OWNER’S MANUAL
Safety, Assembly, Operating, and Maintenance Instructions
Model MT (23.0 HP)
Model MTL (25.0 HP)
Model MTEFI (26.0 HP)
Model MTLEFI (31.0 HP)
™
Please Read and Save These Instructions
For Safety, Read All Safety and Operation
Instructions Prior to Operating Machine
Effective Date: 08-09-09
P/N 8000-16
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Table of Contents
General Information ________________ 1
Operating Instructions_____________ 29
HIGHLIGHTED INFORMATION _____________ 1
GLOSSARY ____________________________ 1
IDENTIFYING NUMBER LOCATIONS________ 1
ENGINE SERIAL NUMBER LOCATION ______ 2
SERVICING OF ENGINE AND
CONTROL IDENTIFICATION,
LOCATION, AND FUNCTION _____________ 29
Operating Controls ___________________ 29
Engine Choke - (Model MT and MTL only) 29
Engine Throttle _____________________ 30
Forward Speed Control (FSC) _________ 30
Steering Levers _____________________ 30
Blade Clutch (PTO) __________________ 30
Parking Brake ______________________ 30
Front Body Latch Release ____________ 32
Transmission Lockout Levers __________ 32
Optional Cold Start Lever _____________ 32
Suspension Seat (MTL and MTLEFI) ____ 33
Instrument Panel _____________________ 35
Hourmeter _________________________ 37
Voltmeter _________________________ 37
Oil Pressure Warning Light ____________ 37
Over Temperature Warning Light
DRIVETRAIN COMPONENTS ______________ 2
Specifications________________________ 3
ENGINE________________________________ 3
ELECTRICAL SYSTEM ___________________ 4
TRANSMISSION_________________________ 4
BLADE DRIVE __________________________ 5
TIRE SIZE ______________________________ 5
TIRE PRESSURE ________________________ 5
DIMENSIONS (Tractor and Mower) _________ 5
MOWER DECK__________________________ 6
CURB WEIGHT__________________________ 6
DRIVE BELTS___________________________ 6
GHS SYSTEM (Optional)__________________ 6
SEAT__________________________________ 7
FRAME/BODY CONSTRUCTION ___________ 7
(Model MT and MTEFI Only) __________ 37
Water Temperature Warning Light
(Model MTL and MTLEFI Only) ________ 38
Water Temperature Gauge
Component Identification___________ 8
Safety Instructions _________________ 13
BEFORE OPERATING___________________ 13
OPERATING___________________________ 15
MAINTENANCE ________________________ 17
SAFETY, CONTROL,
(Model MTL and MTLEFI Only) ________ 38
Engine Service Light
(Model MTEFI and MTLEFI Only) _______ 38
Ignition Switch ______________________ 38
Light Switch (For Optional Lights) _______ 38
Warning Horn ______________________ 38
Circuit Breakers ____________________ 39
STARTING THE ENGINE_________________ 39
ADJUSTING GROUND
SPEED AND STEERING _________________ 40
ENGAGING THE MOWER________________ 42
STOPPING THE MACHINE _______________ 43
ADJUSTING CUTTING HEIGHT ___________ 44
TRANSMISSION LOCKOUT ______________ 44
RECOMMENDATIONS FOR MOWING ______ 45
RECOMMENDATIONS FOR TILT-UP DECK
OPERATION/TRANSPORT _______________ 47
GRASS HANDLING SYSTEM (GHS) _______ 48
General Information __________________ 49
Clogging Checklist ___________________ 50
Using the Tilt-Up Deck ________________ 51
AND INSTRUCTION DECALS _____________ 18
Assembly Instructions _____________ 20
SETUP INSTRUCTIONS _________________ 20
Tire Installation (Tractor)_______________ 20
Battery Service_______________________ 20
Wet Battery Service __________________ 20
Dry Battery Service __________________ 20
Battery Charging ____________________ 21
Battery Installation ___________________ 22
Mower Deck Assembly ________________ 22
Deck Caster Wheels Installation ________ 22
Deck Discharge Chute Installation ______ 22
Deck Discharge Shield Installation ______ 23
PTO Shaft Guard Installation __________ 23
Tilt-Up Roller Wheel Installation ________ 23
Mower Deck Installation on Tractor ______ 23
Deck Installation ____________________ 23
Deck Leveling ______________________ 25
PREOPERATING CHECKLIST ____________ 26
Using the GHS Catcher________________ 51
®
Powerfil
_________________________ 51
“Full” Signal Horn ___________________ 51
Cleaning the GHS Exhaust Screen ______ 51
Dumping the Catcher _________________ 52
Tailgate Dumping ___________________ 52
Using the Dump Bag _________________ 52
Power Dump Option _________________ 53
®
Hi-Dump Option ___________________ 54
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Table of Contents
Mower Deck Gearbox Oil Seals _________ 75
Spark Plugs _________________________ 75
Ignition Wires________________________ 75
Fuel Lines and Clamps ________________ 75
Radiator Hoses and Clamps -
Maintenance Instructions__________ 57
MAINTENANCE SCHEDULE CHART _______ 57
IMPORTANT TIPS FOR CARE
OF THE KOHLER ENGINE _______________ 58
Fuel System _________________________ 58
Starting/Stopping_____________________ 58
Cooling System - MT, MTEFI____________ 58
Cooling System - MTL _________________ 58
Air Cleaner System ___________________ 58
Oil _________________________________ 59
LUBRICATION _________________________ 59
Engine Oil ___________________________ 59
Engine Break-In Oil __________________ 59
Checking Engine Crankcase Oil Level ___ 59
Changing Engine Crankcase Oil/Oil Filter _ 60
Mower Deck Gearbox Lubrication _______ 60
DSD52 or DSD62
Mower Deck Lubrication _______________ 61
Tractor PTO Gearbox Lubrication _______ 62
Checking Gearbox Oil Level ___________ 62
Changing Gearbox Oil ________________ 62
Gear Axle Lubrication _________________ 62
Hydrostatic Transmission Fluid _________ 63
Checking Hydrostatic
MTL and MTLEFI _____________________ 76
Blade Brake Action ___________________ 76
PTO U-Joints ________________________ 76
Safety Switch System _________________ 76
Forward Speed Control Friction Lock ____ 76
REPLACING/REPAIRING ________________ 77
Drive Belts __________________________ 77
Engine PTO Drive Belt _______________ 78
Jackshaft Drive Belt _________________ 79
GHS Blower Drive Belt _______________ 80
Hydrostatic Ground Drive Belt _________ 81
Fuel Filter - Model MT and MTL _________ 82
Fuel Filter - MTEFI and MTLEFI _________ 82
Blade Overload Shear Bolts ____________ 83
PTO Shear Pin _______________________ 83
Mower Blades _______________________ 84
ADJUSTMENTS________________________ 85
Steering Levers ______________________ 85
Tilt-Up Deck Adjustable Stop ___________ 85
GHS Signal Horn Adjustment
Transmission Fluid Level ______________ 63
Grease Fitting and Oil Point Lubrication __ 63
CLEANING ____________________________ 66
Engine Air Cleaner System _____________ 66
Turbine Precleaner __________________ 66
Donaldson Radialseal™ Air Cleaner _____ 67
Engine Cooling System - MT and MTEFI __ 68
Air Intake System ___________________ 68
Cylinder Head Cooling Fins ____________ 69
Engine Cooling System - MTL and MTLEFI 69
Radiator Screen and Cooling Fins ______ 69
Flushing Radiator and Changing Coolant _ 70
Grass Buildup in Mower Housing________ 70
GHS Blower _________________________ 71
GHS Exhaust Screen __________________ 71
Hydrostatic Transmission Cooling Fins __ 71
CHECKING/SERVICING _________________ 72
Engine Cooling System - MTL and MTLEFI 72
Coolant Level ______________________ 72
Security of Air Filtration Components ____ 72
Battery______________________________ 73
Electrolyte Level ____________________ 73
Cleaning the Terminals _______________ 73
Charging the Battery _________________ 73
Tire Pressure ________________________ 74
Wheel Bolt Torque ____________________ 74
Sharpen Mower Blades ________________ 74
Drive Belts __________________________ 75
(When Horn Sounds at Wrong Time)_____ 86
Warranty___________________________ 87
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General Information
HIGHLIGHTED INFORMATION
LEFT HAND (LH) refers to the left-hand side of
the tractor when the operator is seated facing
forward in the tractor seat.
Walker Manufacturing recommends that any service
requiring special training or tools be performed by
an authorized Walker Mower Dealer. There are sev-
eral general practices to be aware of in the area of
safety. Most accidents associated with the opera-
tion or maintenance of a Walker Mower are caused
by disregarding basic safety precautions or specific
warnings. Such accidents, in most cases, can be
prevented by being aware of the dangers present.
POWER TAKE-OFF (PTO) transmits engine
power to run the cutter blades and GHS blower.
POWERFIL spreads the mowed material
throughout the interior of the grass catcher by
an oscillating delivery spout.
RIGHT HAND (RH) refers to the right-hand side
of the tractor when the operator is seated facing
forward in the tractor seat.
Information of special importance has been high-
lighted in bold type in this manual. Refer to Safety
Instructions for the meanings of DANGER, WARN-
ING, CAUTION, IMPORTANT, and NOTE.
SIDE DISCHARGE (SD) mows but does not
collect the mowed material.
GLOSSARY
STEERING LEVERS steer the tractor by con-
trolling the dual hydrostatic transmissions.
There are many terms that are either unique to this
equipment or that are used as acronyms. The
following terms and their definitions will help while
using this manual:
TRACTOR is the prime mover, including the en-
gine, drive train, operator seat, and controls to
operate the mower.
DECK is the mowing attachment mounted on
the front of the tractor which includes the carrier
frame, deck housing, blade drive gearboxes,
and cutter blades.
TRANSMISSION LOCKOUT releases the hy-
drostatic transmissions to permit freewheeling
the tractor.
IDENTIFYING NUMBER LOCATIONS
ELECTRONIC CONTROLUNIT (ECU) controls
engine functions such as spark timing, fuel/air
ratio, etc.
The tractor serial number plate is affixed to the trac-
tor body just below the left rear corner of the seat.
The mower deck serial number plate is affixed
alongside the angle iron framing on the LH side of
the LH mower blade drive. Model and serial num-
bers are helpful when obtaining replacement parts
and maintenance assistance. For ready reference,
please record these numbers in the space provided.
FORWARD SPEED CONTROL (FSC) controls
the maximum forward speed of the tractor;
functioning as a cruise control.
GRASS HANDLING SYSTEM (GHS ) collects
mowed material and deposits it in the catcher.
GRASS-PAK SWITCH is mounted on the
Tractor Model No. _______________________
Tractor Serial No. _______________________
grass delivery spout (in the catcher) and acti-
vates the “full” signal horn when the grass
catcher is full.
Deck Serial No.
_______________________
GROUND DRIVE refers to the dual hydrostatic
transmissions which drive the main wheels.
Engine Model No. _______________________
Engine Serial No. _______________________
Date of Purchase _______________________
HYDROSTATIC TRANSMISSION transmits
and controls power from the ground drive belt to
the main drive wheel.
Fill In By Purchaser
1
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General Information
Serial Number
Serial Number
Tractor Serial Number Location
Engine Serial Number Location
(MTL and MTLEFI)
SERVICING OF ENGINE AND DRIVETRAIN
COMPONENTS
The detailed servicing and repair of the engine,
hydrostatic transmission, and gearboxes are not
covered in this manual. Only routine maintenance
and general service instructions are provided. For
the service of these components during the limited
warranty period, it is important to find a local,
authorized servicing agent of the component manu-
facturer. Any unauthorized work done on these
components during the warranty period may void
the warranty. If you have any difficulty finding an
authorized outlet or obtaining warranty service,
please contact our Service Department for assis-
tance:
Serial Number
Mower Deck Serial Number Location
ENGINE SERIAL NUMBER LOCATION
Refer to the engine manual that accompanies this
manual for the location of the engine serial number.
For the mower model(s) covered by this manual, an
engine manual is available from Kohler covering the
Kohler engines.
Walker Manufacturing Company
5925 E. Harmony Road
Fort Collins, CO 80528
1-970-221-5614
Service manuals are available for each of these
components from their respective manufacturers as
follows:
Kohler Engines
Kohler Company
Kohler, WI 53044
800-544-2444
Hydrostatic
Transmissions
Eaton Corporation
15151 Highway 5
Eden Prairie, MN 55344
Gearboxes (Deck)
Tecumseh Power Co.
1555 S. Jackson Street
Salem, IN 47167
Serial Number
Engine Serial Number Location
(MT and MTEFI)
812-883-3575
2
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Specifications
AIR COOLED
MT (23.0 HP)
MTEFI (26.0 HP)
LIQUID COOLED
MTL (25.0 HP)
MTLEFI (31.0 HP)
MODEL
ENGINE
TM
Manufacturer/Model
Kohler Command Pro
Kohler Aegis LH685, 2 Cyl.,
CH23, 2 Cyl., Gasoline
(Air-Cooled)
Gasoline (Liquid-Cooled)
TM
Kohler Command Pro
Kohler Aegis LH775, 2 Cyl.,
CH26, 2 Cyl., Gasoline (Air-
Cooled), Electronic Fuel
Injection (EFI)
Gasoline (Liquid-Cooled),
Electronic Fuel Injection (EFI)
Displacement
Displacement
Displacement
Displacement
CH23/CH680
CH26/CH735
LH685
41.1 cu. in. (674 cc)
44.0 cu. in. (721 cc)
41.1 cu. in. (674 cc)
45.6 cu. in. (748 cc)
LH775
HP (@ 3600 RPM) CH23/CH680
HP (@ 3600 RPM) CH26/CH735
23.0
26.0
HP (@ 3600 RPM)
HP (@ 3600 RPM)
LH685
LH775
25.0
31.0
Max. RPM (No Load)
Governed RPM
3750
3600
3750
3600
Max. Torque [ft-lb (N·m) @ RPM]
CH23/CH680
CH26/CH735
LH685
37.9 (51.4) @ 2400
41.6 (56.4) @ 2700
35.9 (48.7) @ 2200
45.4 (61.6) @ 2400
LH775
Idle RPM
1200 75
1200 75
Spark Plug Type
Spark Plug Gap
Crankcase Capacity
Crankcase Lubricant
Champion RC12YC
Champion RC14YC
.030 in. (.76 mm)
1.7 qts (1.6 liters)
.030 in. (.76 mm)
1.7 qts (1.6 liters)
API SG, SH, SJ or higher
Grade Oil Only with 10W-30
Viscosity above 0° F (-18° C),
or 5W-20 or 5W-30 Viscosity
below 32° F (0° C)
API SG, SH, SJ or higher
Grade Oil Only with 10W-30
Viscosity above 0° F (-18° C),
or 5W-20 or 5W-30 Viscosity
below 32° F (0° C)
Oil Filter
12 050 01 S
12 050 01 S
Cooling System
Cooling System
Cooling System
CH23/CH680
CH26/CH735
LH685
Air-Cooled
Air-Cooled
Liquid-Cooled
Liquid-Cooled
LH775
Cooling System Capacity
(Approx.)
LH685/LH775
1.25 Gallons (4.73 liters)
Coolant
50/50 Pre-Mix Anti-freeze/
water
Cooling Fan
Electric radiator cooling fan
with reversible self-cleaning
action
Fuel Tank Capacity
Fuel
5 Gallons (19.0 liters)
5 Gallons (19.0 liters)
Regular Grade Unleaded
Gasoline (87 Octane)
Regular Grade Unleaded
Gasoline (87 Octane)
3
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Specifications
AIR COOLED
MT (23.0 HP)
MTEFI (26.0 HP)
LIQUID COOLED
MTL (25.0 HP)
MTLEFI (31.0 HP)
MODEL
ELECTRICAL SYSTEM
Battery
12 Volt, 35AH, 295 CCA
Flywheel Alternator
12 Volt, 41AH, 340 CCA
(Interstate U1-SP40)
Charging System
Charging Output
Flywheel Alternator
25 Amp DC (Regulated)
CH23/CH680
CH26/CH735
15 Amp DC (Regulated)
25 Amp DC (Regulated)
System Polarity
Ignition
Negative Ground
Negative Ground
Electronic Capacitive
Discharge
Electronic Capacitive
Discharge
Starter
12 Volt Electric Ring-Gear
Type, Solenoid Shift
12 Volt Electric Ring-Gear
Type, Solenoid Shift
Interlock Switch
Ignition Lockout by Seat
Switch, Transmission Neutral
and Blade Clutch
Ignition Lockout by Seat
Switch, Transmission Neutral
and Blade Clutch
Circuit Breaker
Auto Reset (30A)
LH685
LH775
Auto Reset (30A)
Auto Reset (40A)
TRANSMISSION
Manufacturer/Model
Dual Hydrostatic, Eaton
Model 7, Each Wheel
Independently Driven
Dual Hydrostatic, Eaton
Model 7, Each Wheel
Independently Driven
Steering
Hand Lever Control /
Individual Wheel
Hand Lever Control /
Individual Wheel
Forward Speed Control
Precision Friction Lock Lever,
Cruise Control, with
Neutral-Park Position
Precision Friction Lock Lever,
Cruise Control, with
Neutral-Park Position
Service Brake
Parking Brake
Neutral
Dynamic Braking through
Hydrostatic Transmission
Dynamic Braking through
Hydrostatic Transmission
Mechanical Pin Lock in
Transmission Gear
Mechanical Pin Lock in
Transmission Gear
Transmission Release by
Manual Dump Valve
Transmission Release by
Manual Dump Valve
Final Drive
Gear Drive Axle
Gear Drive Axle
Transmission Fluid
Factory Service
Mobil 1 Synthetic Motor Oil
(15W-50)
Mobil 1 Synthetic Motor Oil
(15W-50)
Alternate Transmission Fluid
SAE 30W Straight Viscosity
Motor Oil
SAE 30W Straight Viscosity
Motor Oil
Transmission Fluid Capacity
Transmission Cooling
1 qt (1 liter)
1 qt (1 liter)
Cooling Fan Mounted on
Drive Pulley
Cooling Fan Mounted on
Drive Pulley
4
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Specifications
AIR COOLED
MT (23.0 HP)
MTEFI (26.0 HP)
LIQUID COOLED
MTL (25.0 HP)
MTLEFI (31.0 HP)
MODEL
TRANSMISSION (continued)
Ground Travel Speed
Forward m.p.h. (km/h)
Reverse m.p.h. (km/h)
0-5 (0-8) Infinitely Variable*
0-5 (0-8) Infinitely Variable
0-7 (0-11) Infinitely Variable
0-7 (0-11) Infinitely Variable
* 6.5 m.p.h. with Optional Speed-Up Kit
BLADE DRIVE
PTO Shaft
Quick Disconnect Splined
Shaft with Two High-Speed
U-Joints
Quick Disconnect Splined
Shaft with Two High-Speed
U-Joints
Blade Spindle
Each Blade (2) Mounts Direct
on Peerless Right Angle
Gearbox with Tee Gearbox
in Center Connected to PTO
Shaft (Complete Geared
Drive, Peerless Model 1000
Gearboxes)
Each Blade (2) Mounts Direct
on Peerless Right Angle
Gearbox with Tee Gearbox
in Center Connected to PTO
Shaft (Complete Geared
Drive, Peerless Model 1000
Gearboxes)
Blade Drive Clutch and Brake
Manual Belt Tightener Clutch
and Band Brake [Stops
Manual Belt Tightener Clutch
and Band Brake [Stops
Blades within Five (5)
Blades within Five (5)
Seconds of Disengagement]
Seconds of Disengagement]
Max. Blade Speed
[22 in. (56 cm) Blade]
@ 3600 RPM Engine
2900 RPM
[16700 FPM (5090 m/min)]
2900 RPM
[16700 FPM (5090 m/min)]
TIRE SIZE
Deck Caster Wheel
36, 42, 48, 56
52, 62, 74
8 x 3.00-4 Pneumatic (4-Ply)
11 x 4.00-5 Pneumatic
8 x 3.00-4 Pneumatic (4-Ply)
11 x 4.00-5 Pneumatic
Deck Caster Wheel (Optional)
36, 42, 48, 56
8 x 3.00-4 Foamed Rubber
18 x 9.50-8 (4-Ply)
8 x 3.00-4 Foamed Rubber
18 x 9.50-8 (4-Ply)
Drive
Drive (Optional Wide Tire)
Rear (Dual)
18 x 10.50-10 (4-Ply)
13 x 5.00-6 (4-Ply)
18 x 10.50-10 (4-Ply)
13 x 5.00-6 (4-Ply)
TIRE PRESSURE
Deck Caster Wheel
Drive
20 PSI (137 kPa)
15 PSI (103 kPa)
20 PSI (137 kPa)
20 PSI (137 kPa)
15 PSI (103 kPa)
20 PSI (137 kPa)
Rear
DIMENSIONS (Tractor and Mower)**
Length
91 in. (231 cm)
49 in. (124 cm)
49 in. (124 cm)
42-1/4 in. (107 cm)
29-3/4 in. (76 cm)
91 in. (231 cm)
49 in. (124 cm)
49 in. (124 cm)
42-1/4 in. (107 cm)
29-3/4 in. (76 cm)
Width
Height
Wheel Base (Tractor)
Tread Width (Tractor)
5
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Specifications
AIR COOLED
MT (23.0 HP)
MTEFI (26.0 HP)
LIQUID COOLED
MTL (25.0 HP)
MTLEFI (31.0 HP)
MODEL
MOWER DECK
Width of Cut SD/GHS
Cutting Height
42 or 48 in. (107 or 122 cm)
1 to 4 in. (3 to 10 cm)
42 or 48 in. (107 or 122 cm)
1 to 4 in. (3 to 10 cm)
Height Adjustment
7 Positions - 1/2 in. (1 cm)
Increment Hitch Pins Installed
in Multi-Position Deck Support
7 Positions - 1/2 in. (1 cm)
Increment Hitch Pins Installed
in Multi-Position Deck Support
Blade Size (Typical)
42 in. (107 cm) SD
22 in. (56 cm)
2 in. (5 cm) Center Overlap
(Two Blades, CW Rotation)
22 in. (56 cm)
2 in. (5 cm) Center Overlap
(Two Blades, CW Rotation)
48 in. (122 cm) GHS
Deck Suspension
25 in. (64 cm)
2 in. (5 cm) Center Overlap
(Two Blades, Counter Rotate)
25 in. (64 cm)
2 in. (5 cm) Center Overlap
(Two Blades, Counter Rotate)
Torsion-Flex Frame with
Caster Wheels and
Counterweight Springs
Torsion-Flex Frame with
Caster Wheels and
Counterweight Springs
CURB WEIGHT (Approximate)
SD Tractor Only
664 lb (301 kg) MT
706 lb (320 kg) MTL
672 lb (305 kg) MTEFI
718 lb (326 kg) MTLEFI
GHS Tractor Only
786 lb (357 kg) MT
829 lb (376 kg) MTL
796 lb (361 kg) MTEFI
841 lb (382 kg) MTLEFI
Tractor and Mower**
984 lb (446 kg) MT
1027 lb (466 kg) MTL
994 lb (451 kg) MTEFI
1039 lb (471 kg) MTLEFI
DRIVE BELTS
Engine PTO
Walker P/N 8230
Walker P/N 8230
Jackshaft Drive
Gates 3VX375
(or Walker P/N 6250)
Gates 3VX375
(or Walker P/N 6250-1)
Ground Drive, Micro-V
Blower (GHS Model)
Walker P/N 7248
Walker P/N 7248
Gates 3VX280
(or Walker P/N 7234-2)
Gates 3VX280
(or Walker P/N 7234-2)
GHS SYSTEM (Optional)
Blower
4-1/2 x 10-1/2 x 1/2 in.
(11 x 27 x 1 cm) Three-Blade
Paddle Wheel (Driven by
Mower Engine)
4-1/2 x 10-1/2 x 1/2 in.
(11 x 27 x 1 cm) Three-Blade
Paddle Wheel (Driven by
Mower Engine)
Blower Brake
Band Brake [Works in Combi-
nation with PTO Clutch, Stops
Blower within Five (5) Seconds
of PTO Disengagement]
Band Brake [Works in Combi-
nation with PTO Clutch, Stops
Blower within Five (5) Seconds
of PTO Disengagement]
Max. Blower Speed
4000 RPM
4000 RPM
Hi-Dump Option
Max. Lift Capacity
200 lb (91 kg)
200 lb (91 kg)
6
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Specifications
AIR COOLED
MT (23.0 HP)
MTEFI (26.0 HP)
LIQUID COOLED
MTL (25.0 HP
MTLEFI (31.0 HP)
MODEL
GHS SYSTEM (Optional) (continued)
Grass Catcher Capacity
93 Gallons (352 liters)/
10.0 Bushels
93 Gallons (352 liters)/
10.0 Bushels
Optional Grass Catcher
Capacity
65 Gallons (247 liters)/
7.0 Bushels
65 Gallons (247 liters)/
7.0 Bushels
®
Full Signal (Grass-Pak Switch)
Oscillating Vane Switch
Oscillating Vane Switch
Mounted on Grass Delivery
Spout Triggers Horn Signal
Mounted on Grass Delivery
Spout Triggers Horn Signal
®
Powerfil
Oscillating Delivery Spout
Driven by 12 Volt Electric
Gearmotor Spreads Material
throughout Interior of Catcher
@ 25 Cycles/Minute
Oscillating Delivery Spout
Driven by 12 Volt Electric
Gearmotor Spreads Material
throughout Interior of Catcher
@ 25 Cycles/Minute
SEAT
Contour-Molded, with Nylon
Backed Vinyl Cover and
Integral Foam Cushion
Full Spring Suspension with
Dampening and Adjustments
for Back Angle, Lumbar
Support, andOperatorWeight.
Standard with Armrests
FRAME/BODY CONSTRUCTION
Frame
All Welded Unitized Steel
Chassis
All Welded Unitized Steel
Chassis
Body
14 Gauge Steel
11 Gauge Steel
14 Gauge Steel
11 Gauge Steel
Deck
GHS Catcher and Chutes
Molded Cross-Linked
Polyethylene (UV Stabilized)
Molded Cross-Linked
Polyethylene (UV Stabilized)
**Dimensions and weight shown are for 48 in. (122 cm) GHS Model (typical).
Dimensions for Tractor and Mower with 42 in. (107 cm) deck are:
Length = 88 in. (224 cm)
Width = 43 in. (110 cm)
For SD Models, subtract 7 in. (18 cm) from the height.
Deck weight for 48 in. (122 cm) Tilt-Up deck = 205 lb (93 kg). Deck sizes range from 42 to 74 in.
(107 to 188 cm), with corresponding deck weights ranging from 170 to 400 lb (77 to 181 kg).
Optional (7.0 Bushel) Grass Catcher subtracts approx. 5 lb (2 kg) and 5 in. (13 cm) in Height
NOTE: The manufacturer reserves the right to make changes in specifications shown herein at any time
without notice or obligation.
7
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Component Identification
NOTE: Control Identification
shown in Operating
Instructions section.
Grass Handling System
10.0 Bushel Catcher Standard
Turbine
Precleaner
7.0 Bushel Catcher (Optional)
(Not Shown)
Tilt-Up
Latch
Spring Clip
Transmission Control Rod
Adjustment Nut (LH)
Anti-Scuff
Roller
Deck Support Pins
and Height Adjustment
Hitch Pins
Catcher Lift /
Dump Handle
Fuel Tank
and Cap
CounterweightSpring
and Protective Cover
Transmission Control Rod
Adjustment Nut (RH)
Footrests
Deck Lift Handle
(Cutting Height Adjustment)
Deck
Caster Wheels
Tilt-Up
Hook
Deck Support
Arm (LH)
Tilt-Up
Deck Handle
Front View and Right Side View
8
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Component Identification
Removable Grass
Catcher Screen
(Not Visible)
Catcher Door
Gas Spring
Catcher
Door
Catcher Lift /
Dump Handle
Instrument Panel
Guard
Dump
Plate
Instrument Panel Box
(Shock Mounted)
Anti-Scuff
Roller
Catcher
Door Handle
Tailpipe Oil
Muffler
Filter
Left Hand
Drive Wheel
Fuel Filter
(Not Visible)
Oil Drain
Plug
Tailwheel Fork
and Wheels
Rear View and Left Side View
9
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Component Identification
Model MT
Air Intake
Plenum
Donaldson Air Cleaner
Fuel Filter
Fuel Pump
Muffler Grass
Shield
Air Cleaner
Cover
Air Restriction Indicator
Throttle and
Choke Linkage
Fuel Pickup
Line
Air Intake Hose
Fuel Tank
Muffler Heat
Shield
Oil Dipstick/Oil Fill
Rubber Bumper
(Catcher Support)
Precleaner
Tube
Muffler
Jackshaft
PTO Gearbox
Dipstick
20 Amp Fuse
(Starter Solenoid)
GHS Blower
Turbine
Precleaner
RH Transmission
Lockout Lever
RH Hydrostatic
Transmission
30 Amp
Circuit Breaker
Neutral Safety
Switch
LH Hydrostatic
Transmission
PTO
Clutch Lever
Positive (+)
Battery Cable
Negative (-)
Battery Cable
Battery
LH Transmission
Lockout Lever
Top View (Engine Compartment) Model MT
10
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Component Identification
Model MTEFI
Air Cleaner Cover
Fuel Pump
Fuel Line to Engine
(High Pressure)
Donaldson Air Cleaner
Muffler Grass
Shield
Air Restriction Indicator
Throttle Linkage
Fuel Pickup Line
Fuel Return Line
Air Intake Hose
Oil Dipstick/Oil Fill
Muffler
Fuel Tank
Rubber Bumper
(Catcher Support)
Precleaner
Tube
Ignition
Coil
Air Intake
Plenum
Top View (Engine Compartment) Model MTEFI
11
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Component Identification
Model MTL and MTLEFI
Air Restriction Indicator
(Not Visible)
Muffler Grass
Shield
Air Cleaner
Muffler
Donaldson Air Cleaner
Cover
Fuel Pump
(Not Visible)
Overflow
Tank
Radiator
Hose
Overflow
Hose
Radiator Cap
Fuel Pickup
Line (MTL)
Throttle Linkage
(Not Visible)
Fuel Return Line
(MTLEFI)
Oil Pressure
Switch
Air Intake Hose
Oil Dipstick/
Oil Fill
Fuel Tank
Radiator
Guard
Precleaner
Tube
Radiator
Rubber Bumper
(Body Support)
Fuel Line to Engine
(High Pressure)
Bottom of Tank
(MTLEFI)
Air Intake
Plenum
Top View (Engine Compartment) Model MTL and Model MTLEFI (Model MTLEFI Shown)
12
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Safety Instructions
Pay particular attention to any information labeled
DANGER, WARNING, CAUTION, IMPORTANT,
and NOTE in this manual.
Walker Manufacturing cannot predict every poten-
tially dangerous situation. Therefore, items labeled
as such in this manual do not cover all conceivable
situations. Any person using procedures, tools, or
control techniques not recommended by Walker
Manufacturing must take full responsibility for safety.
When you see the Safety Alert Symbol (
),
read, understand, and follow the instructions. Fail-
ure to comply with safety instructions may result in
personal injury.
The Walker Rider Lawnmower has been designed
withmanysafetyfeaturestoprotecttheoperatorfrom
personal harm or injury. However, it is necessary for
the operator to use safe operating procedures at all
times. Failure to follow safety instructions con-
tained in this manual may result in personal in-
jury or damage to equipment or property.
The seriousness or degree of importance of each
type of information is defined as follows:
DANGER
An IMMEDIATE hazard that WILL result in
severe personal injury or DEATH, if warn-
ing is ignored and proper safety precau-
tions are not taken.
If you have any questions concerning setup, opera-
tion, maintenance, or safety, please contact your
authorized Walker Mower dealer or call Walker
Manufacturing Company at (970) 221-5614.
BEFORE OPERATING
1. Read and understand the contents of this
Owner's Manual before starting and operat-
ing the machine. Become thoroughly familiar
with all machine controls and how to stop the
machine and disengage the controls quickly.
Replacement Owner's Manuals are available
by sending the Model and Serial Number to:
WARNING
A POTENTIAL hazard that COULD result in
severe personal injury or DEATH, if warn-
ing is ignored and proper safety precau-
tions are not taken.
Walker Manufacturing Company
5925 East Harmony Road
Fort Collins, CO 80528
CAUTION
2. Never allow children to operate rider mower.
Do not allow adults to operate without proper
instruction.
Possible hazards or unsafe practices that
MAY result in MODERATE personal injury
or property damage, or machine damage, if
warning is ignored and proper safety pre-
cautions are not taken.
3. Clear the area to be mowed of any foreign
objects which may be picked up and thrown by
cutter blades. Pick up all sticks, stones, wire,
and any other debris.
IMPORTANT: Identifies mechanical information
demanding special attention, since it deals with the
possibility of damaging a part or parts of the ma-
chine.
4. Keep everyone, especially children and pets, a
safe distance away from the area being mowed.
Do not mow with bystanders in the area.
5. Do not operate the machine barefoot or wearing
sandals, sneakers, tennis shoes, or similar
lightweight footwear. Wear substantial pro-
tective footwear.
NOTE: Identifies information worthy of special
attention.
13
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Safety Instructions
6. Do not wear loose fitting clothing that could get
caught in moving parts. Do not operate this
machine while wearing shorts; always wear
adequate protective clothing, including long
pants. Wearing safety glasses, safety shoes,
and a helmet is advisable and required by some
local ordinances and insurance regulations.
11. Never attempt to make any adjustments
while the engine is running, except where
specifically instructed to do so.
12. The electrical system battery contains sulfuric
acid. Avoid any contact with skin, eyes, and
clothing. Keep the battery and acid out of reach
of children.
7. Prolonged exposure to loud noise can cause
impairment or loss of hearing. Operator hear-
ing protection is recommended; particularly
for continuous operation of the GHS Model due
to blower noise level. Wear a suitable hearing
protective device, such as earmuffs or earplugs.
WARNING
The engine exhaust from this product
contains chemicals known to the State of
California to cause cancer, birth defects
or other reproductive harm.
8. Keep all protective shields and safety de-
vices in place. If a protective shield, safety
device, or decal is damaged, unusable, or miss-
ing, repair or replace it before operating the ma-
chine.
9. Be sure interlock switches are functioning
correctly, so the engine cannot be started un-
less the Forward Speed Control lever is in the
NEUTRAL-PARK position, and the PTO clutch
is in the DISENGAGED position. Also, the en-
gine should stop if the operator lifts off the seat
with either the Forward Speed Control (FSC)
out of the NEUTRAL-PARK position or the PTO
clutch in the ENGAGED position.
NOTE: There is a 1 to 1-1/2 second time delay
function on the seat switch to avoid engine
power interruption when driving over bumps.
10. Handle gasoline with care. Gasoline is highly
flammable and its vapors are explosive:
a. Use an approved fuel container.
b. Never add fuel to a running engine or hot
engine (allow hot engine to cool several
minutes).
c. Keep matches, cigarettes, cigars, pipes,
open flames, or sparks away from the fuel
tank and fuel container.
d. Always fill the fuel tank outdoors using
care. Fill to about one inch from the top of
the tank. Use a funnel or spout to prevent
spilling.
e. Replace the machine fuel cap and con-
tainer cap securely and clean up any
spilled fuel before starting the engine.
14
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Safety Instructions
OPERATING
7. Do not operate machine if the operator pres-
ence safety switch system is not working.
Verify proper operation by having the operator
lift off the seat with the engine running and mov-
ing two controls, one at a time; (1) Move the
FSC lever out of the NEUTRAL-PARK position,
and (2) Engage the PTO Clutch. Moving either
control should stop the engine after a 1-1/2 sec-
ond delay.
1. Operate the mower only in daylight or in
good artificial light with good visibility of the area
being mowed.
2. Sit on the seat when starting the engine and
operating the machine. Keep feet on the deck
footrests at all times when the tractor is moving
and/or mower blades are operating. Never op-
erate the tractor without a deck or implement
installed.
8. Do not run the engine in a confined area
without adequate ventilation. Exhaust fumes
are hazardous and can be deadly.
3. For a beginning operator, learn to steer (ma-
neuver) the tractor with a slow engine speed
before attempting any mowing operation.
Be aware that, with the front mounted mower
configuration, the back of the tractor swings to
the outside during turns.
9. Do not carry passengers - maximum seating
capacity is one (1) person.
10. Watch for holes, rocks, and roots in the terrain
and for other hidden hazards. When mowing tall
grass, mow higher than desired to expose any
hidden obstacles. Then, clean the area and
mow to the desired height.
DANGER
Do not mow around overhanging tree
branches or bushes at the same height as
the operator’s torso and head where inad-
vertent contact may cause injury.
11. Avoid sudden starts or stops. Before backing
the machine up, look to the rear to be sure no
one is behind the machine. Watch carefully for
traffic when crossing or working near roadways.
12. Disengage the blade drive when transporting
the machine across drives, sidewalks, etc. Ne-
ver raise the mower deck while blades are
rotating.
4. Remember, for an emergency stop, the forward
motion of the tractor can always be stopped by
pulling the Forward Speed Control (FSC) into
the NEUTRAL-PARK position.
5. In case either of the transmission drive belts
break during operation, and if the machine is on
a slope, the machine will freewheel down the
slope. To maintain control, immediately (1)
Release the steering levers and simultaneously
(2) Move the FSC to the NEUTRAL-PARK po-
sition. When the machine is stopped or moving
slowly, engage the parking brake.
DANGER
Do not mow or dump grass within 5 feet
(1.5 meters) of an embankment or retain-
ing wall with drop off.
13. The maximum recommended side slope op-
erating angle is 20 degrees or 33% grade.
When operating the machine on a slope, re-
duce speed and use caution to start, stop, and
maneuver. To prevent tipping or loss of control
of the machine, avoid sharp turns or sudden
changes in direction.
NOTE: The emergency stop procedure is
exactly the same procedure as used to nor-
mally stop and park this machine.
6. Disengage the blade clutch and put the FSC in
the NEUTRAL-PARK position before starting
the engine (an ignition interlock switch normally
prevents starting of the machine if these con-
trols are in the OPERATING position).
14. Never adjust cutting height with the engine
running. Before adjusting cutting height or
servicing, disengage the blade clutch (PTO),
stop the engine, and remove the ignition key.
Wait for all movement to stop before getting off
the seat.
15
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Safety Instructions
NOTE: A blade/blower brake should normally
stop drive line rotation within five (5) seconds of
disengaging the PTO clutch.
20. If the cutting blades strike a solid object or the
machine begins to vibrate abnormally, immedi-
ately disengage the blade clutch (PTO), stop
the engine, and wait for all moving parts to
stop. To prevent accidental starting, disconnect
the spark plug wires. Thoroughly inspect the
mower and repair any damage before restarting
the engine and operating the mower. Make sure
cutter blades are in good condition and blade
nuts are torqued to 60 ft-lb (81.3 N·m).
15. For side discharge mower decks, do not
operate with the grass deflector chute
removed. Keep the deflector in the lowest
possible position.
16. For tractors equipped with tilt-up deck, observe
the following recommendations:
21. Do not touch the engine or muffler while the
engineisrunningorimmediatelyafterstopping
the engine. These areas may be hot enough to
cause serious burns.
a. Do not move tractor with deck in tilt-up po-
sition.
b. Never tilt body forward with deck in tilt-up
position.
22. When leaving the machine unattended, dis-
engage the blade clutch (PTO), stop the en-
gine, and remove the key.
17. For GHS equipped models, do not operate the
machine with the grass catcher in the DUMP
position or with the back door OPEN. Dan-
gerous projectiles may be thrown out of the dis-
charge chute or the back of the grass catcher.
23. For Model MTL and MTLEFI, never remove
the radiator pressure cap when the engine
is hot (hot water may spray and cause
burns).
18. For GHS equipped models, use care when
closing the grass catcher door. Keep fingers
and hands away from the hinge and pinch
points when the door is being closed. Also,
keep fingers and hands clear of the door frame.
The door may slam shut with considerable
force.
CAUTION
Use leg muscles and firm footing when lift-
ing the catcher to dump; avoid bending at
the waist and using back muscles to avoid
back injury.
19. In case of a clogged or plugged mower deck
or GHS catching system:
a. Disengage the blade clutch (PTO) and turn
the engine off before leaving the seat.
b. LOOK to make sure blade drive shaft and
blower drive pulley movement has stopped
before trying to unclog the system.
c. Disconnect the spark plug wires.
d. Never place hands under the deck or in the
GHS blower - use a stick or similar tool to
remove clogged material.
16
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Safety Instructions
MAINTENANCE
11. Use care when charging the battery or per-
forming maintenance on the battery and electri-
cal system:
1. To prevent accidental starting of the engine
when servicing or adjusting the machine, re-
move the key from the ignition switch and dis-
connect the spark plug wires.
a. Make sure the battery charger is unplugged
before connecting or disconnecting cables
to the battery.
2. To reduce fire hazards, keep the engine free of
b. Charge the battery in a well-ventilated
space, so gases produced while charging
can dissipate. Make sure the battery vents
in the caps are open.
grass, leaves, excessive grease, and dirt.
3. Keep all nuts, bolts, and screws tight to ensure
the machine is in a safe, working condition.
Check the blade mounting nuts frequently, mak-
ing sure they are tight.
c. Keep sparks, flames, and smoking materi-
als away from the battery at all times. To
avoid sparks, use care when removing bat-
tery cables from posts.
4. Perform only maintenance instructions de-
scribed in this manual. Unauthorized main-
tenance operations or machine modifications
may result in unsafe operating conditions.
d. Disconnect both battery cables before
unplugging any wiring connectors or mak-
ing repairs on the electrical system.
5. If the engine must be running to perform a main-
tenance adjustment, keep hands, feet, and
clothing away from moving parts. Do not wear
jewelry or loose clothing.
IMPORTANT: Keep all applicable manuals
immediately accessible to anyone who may
operate or service this machine.
6. Always use the proper engine service man-
ual when working on the engine. Unautho-
rized maintenance operations or modifications
to the engine may result in unsafe operating
conditions.
7. Altering the equipment or engine in any manner
which adversely affects its operation, perfor-
mance, durability, or use will VOID the warran-
ty and may cause hazardous conditions.
8. Never attempt to disconnect any safety devices
or defeat the purpose of these safety devices.
9. Do not change the engine governor settings or
overspeed the engine. The governor has been
factory-set for maximum-safe engine operating
speed.
10. Use genuine factory replacement parts.
Substitute parts may result in product malfunc-
tion and possible injury to the operator and/or
others.
17
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Safety Instructions
SAFETY, CONTROL, AND INSTRUCTION DECALS
Safety, Control, and Instruction Decals are installed on the machine;
if any are missing, illegible, or damaged, a replacement should be ordered and installed before
putting the machine into operation. The Decal Part Number is listed below and in the Parts Manual.
Adjacent to Blower Discharge Chute
Each End of Mower Deck (5808 All Decks Except 52, 56, 74)
through Body (5804)
(5808-1 52, 56, 74 Decks)
Engine Shroud (5855)
Rear Cross Member of Front Body (MT and MTEFI, 8825)
Top of Body Grass Shield (MTL and MTLEFI, 8825)
SD Deck Discharge Shield (5848)
Battery Hold-Down Bar (MTEFI and MTLEFI only, 5844-2)
Rear of Grass Catcher Exhaust Screen (5869)
On Body Adjacent to Clutch
Control Lever (5806)
Right Side, Below Operator Seat (7809)
Left Side of Operator Seat (8819)
Front Body Adjacent to
RH Steering Lever (7818)
Right Side, Behind
Operator Seat (8400-6)
Left Side of Operator Seat (7819)
18
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Safety Instructions
SAFETY, CONTROL, AND INSTRUCTION DECALS
Safety, Control, and Instruction Decals are installed on the machine;
if any are missing, illegible, or damaged, a replacement should be ordered and installed before
putting the machine into operation. The Decal Part Number is listed below and in the Parts Manual.
Bridge Assembly and LH Gear Axle (5810-3)
Deck Gearbox Cover (5807-3)
Deck Carrier Frame (8647)
Deck Carrier Frame (8653)
On Engine (6810)
Deck Carrier Frame (5865)
Catcher Safety Latch,
RH Side (5874)
(7.0 Catcher only)
Hydrostat Oil
Reservoir
Top of Blower Housing (5819)
Gear Axle (5810-1)
Catcher Door Hinge Bar,
LH and RH Sides (5868)
Jackshaft Support Adjacent
to Dipstick (7827)
Instrument Panel MT (8823-2), MTEFI (8823-3), MTL (8823-4), MTLEFI (8823-5)
Fender, RH Side (7802)
19
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Assembly Instructions
SETUP INSTRUCTIONS
Raise front mower body up for battery access (refer
to Front Body Latch Release in Operating Instruc-
tions). Check the battery for electrolyte level and
charge. The electrolyte level should be at the bot-
tom of the vent wells [1/4 to 1/2 in. (6 to 13 mm)
above plates]. If the specific gravity is less than
1.225, the battery needs charging. If the battery has
been shipped dry, or is wet but needs service, refer
to the following instructions.
Walker Mowers are shipped partially assembled.
After uncrating the tractor and mower deck, initial
setup is required.
NOTE: During the process of unpacking, any dam-
aged or missing parts should be noted and reported
to the delivering carrier immediately (put in writing
within 15 days). The carrier will provide directions
for proceeding with a claim to receive compensation
for damage.
IMPORTANT: Make sure battery is securely
mounted in the frame. A loose battery may cause
damage to the case resulting in acid leakage and se-
vere damage to the machine. A hazard may be cre-
ated by damage to critical working parts and safety
systems.
Tire Installation (Tractor)
Install the drive tires using the eight (8) lug bolts
that are supplied with the owner's packet of materi-
als. Bolts are torqued to 75 to 85 ft-lb. Drive tires are
18 x 9.50-8, 4-ply; rear tires are 13 x 5.00-6, 4-ply.
Check and adjust the inflation of the tires. The
Wet Battery Service
tire inflation recommendations are:
If the battery has been shipped wet, but the electro-
lyte level is low or the battery needs to be charged
then:
Drive = 15 PSI (103 kPa)
Rear = 20 PSI (137 kPa)
Battery Service
1. Fill each battery cell with distilled water to the
bottom of the vent wells.
CAUTION
2. Charge battery. Refer to Battery Charging in
Important Battery Service, Installation, and
Changing Tips for MTEFI/MTLEFI:
this section.
Dry Battery Service
Do not allow the battery cables to touch
opposing terminals. When connecting
battery cables attach the positive (+) cable
topositive(+)batteryterminalfirst,followed
by negative (-) cable to negative (-) battery
terminal.
DANGER
Activating a battery can be dangerous.
The battery should be taken to a reliable
service station, battery store, or power
equipment dealer where a trained techni-
cian can activate the battery safely. DO
NOT attempt to activate the battery unless
you are experienced in battery service
work. The following activation and charg-
ing instructions are provided for use by a
trained battery technician.
Never start the engine when the cables
are loose or poorly connected to the
battery terminals.
Never disconnect battery while engine is
running.
Never use a quick battery charger to
start the engine.
Never "jump start" the engine using
anothersource. Electricityfluctuations can
damage the ECU (Electronic Control Unit).
Always disconnect negative (-) battery
cable lead before charging battery, and
also unplug harness from ECU before per-
forming any welding on equipment.
20
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Assembly Instructions
Battery Charging
DANGER
DANGER
Battery electrolyte is a poisonous and cor-
rosive sulfuric acid solution.
BATTERIES PRODUCE EXPLOSIVE GASES
Avoid spillage and contact with skin,
Charge the battery in a well-ventilated
area, so that gases produced while charg-
ing can dissipate.
eyes, and clothing - causes severe burns.
To prevent accidents, wear safety gog-
gles and rubber gloves when working with
electrolyte.
Keep sparks, flames, and smoking mate-
rials away from the battery at all times.
Neutralize acid spills with baking soda
Make sure the battery cap vents are
open after the battery is filled with acid
(check manifold vent on each cap).
and water solution.
To fill (activate) battery with electrolyte (if battery has
been shipped dry):
Make sure the battery charger is unplug-
ged before connecting or disconnecting
cables to the battery.
1. Remove the battery hold-down bar, disconnect
the battery cables and lift the battery out of the
tray.
IMPORTANT: On MTEFI and MTLEFI models, al-
ways disconnect the negative (-) battery terminal be-
fore charging. Failure to do so can result in damage
to the ECU.
IMPORTANT: Battery must be removed from
the mower before filling with electrolyte.
IMPORTANT: Obtain and use only battery
grade sulfuric acid electrolyte with a 1.265 spe-
cific gravity to activate the battery. DO NOT use
water or any other liquid during initial activation.
1. Charge the battery at 15 amps for 10 minutes.
DO NOT exceed 20 amps maximum recom-
mended charging rate. Charge until specific
gravity is at least 1.250. Total charging time
should not exceed one (1) hour.
2. Remove the filler caps and carefully fill each cell
until the electrolyte is just above the plates.
2. After charging the battery, adjust the electrolyte
level to the bottom of the vent wells [1/4 to 1/2 in.
(6 to 13 mm) above the plates].
3. After the battery is filled with electrolyte, replace
the filler caps and charge the battery. Refer to
Battery Charging.
IMPORTANT: DO NOT overfill the battery.
Electrolyte will overflow through the vented caps
onto parts of the machine and WILL result in
severe corrosion.
3. Install battery.
21
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Assembly Instructions
3. Insert the 3/8-16 x 4-1/2 in. bolt through the
wheel fork with the bolt head to the outside and
install the 3/8-16 in. Keps nut.
Battery Installation
IMPORTANT: Makesurebatteryissecurelymount-
ed in the frame. A loose battery may cause damage
tothecase resultinginacidleakageandseveredam-
age to the machine. A hazard may be created by
damage to critical working parts and safety systems.
4. Tighten the bolt and nut until the axle spacer
tube bottoms against the inside of the wheel
fork (will not turn) while the wheel and spacer
washers (if used) spin freely without binding.
Install the battery in the mower as shown in Battery
Installation photo. Connect the positive (+) first and
then the negative (-) cable to the proper battery ter-
minal [red cable and boot connects to the Posi-
tive (+) terminal]. Slide the rubber boot up and over
the battery post, making sure it covers the post com-
pletely to prevent an electrical short.
Grease Fitting
Locations
Spacer Washer
WARNING
Axle Spacer Tube
Make sure the battery cap vents are open.
Improper venting of the battery COULD
cause a battery explosion.
Deck Caster Wheel Installation
5. Grease the caster wheel bearings and caster
pivot bearings - one grease fitting for each
wheel and each pivot.
Deck Discharge Chute Installation
(GHS Rear Discharge Models Only)
Battery Clamp
Secured by
Wing Nut(s)
Mount the discharge chute hinge on top of the deck
discharge opening using the 1/4-20 x 1/2 in. socket
button head screw and 1/4-20 ESNA nut. Position
the screw with the head inside of the chute and the
nut on the outside. Attach spring for tilt-up action
from chute to bracket on deck.
(+) Battery Cable
Connection
Battery Protector
Plate in Place
Battery Installation
Mower Deck Assembly
Carrier Frame
Tube Sockets
Attach
Chute
Attach Guard
Deck Caster Wheels Installation
1. Remove the bolt, nut, axle spacer tube, and
spacer washers from each deck caster wheel
fork.
NOTE: Spacerwashersareusedonlywhenthe
optional foamed rubber deck wheels (8 x 3.00)
are installed.
Nut on Top
2. Fit the axle spacer tube through the wheel hub,
position the spacer washer on each side of the
hub (if used), and fit the assembly into the wheel
fork.
Discharge Chute and PTO Shaft Guard
Installation on Rear Discharge Deck
22
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Assembly Instructions
Deck Discharge Shield Installation
(Side Discharge Models Only)
Attach Spring
Attach the deck side discharge shield by positioning
the shield hinge lug in front of the deck mount and
fastening with two (2) 3/8-16 x 1-1/4 in. bolts, 3/8-16
ESNA nuts, and 3/8 in. wave spring washers. The
wave washers fit between the two hinging surfaces.
Tighten the nuts until the shield moves freely but is
not loose.
WARNING
Roller Wheels
Tilt-Up Spring and Roller Wheel
Installation on Rear Discharge Deck
DO NOT operate the machine without the
grass deflector chute attached and in the
lowest possible position.
Mower Deck Installation on Tractor
Deck Installation
1. Lightly grease each deck support arm (2) on the
tractor. Refer to Mower Deck Installation
photo for location of deck support arm.
Attach Shield
2. Engage the deck carrier frame tube sockets on
the tractor support arms (refer to Discharge
Chute and PTO Shaft Guard Installation
photo for socket location), slide the deck onto
the support arms approximately 3 in. (76 mm).
3. Retract spring-loaded coupler ring on the PTO
Tube (provided in owner’s packet) and insert
coupler tool. Refer to Quick Coupler Installa-
tion Tool photo.
Discharge Shield Installation
on Side Discharge Deck
PTO Shaft Guard Installation
Quick Coupler
Installation Tool
Position the shaft guard and mount with two (2)
1/4-20 x 1/2 in. bolts.
Tilt-Up Roller Wheel Installation
Mount the two (2) tilt-up roller wheels on the brack-
ets on the rear skirt of the deck housing using the
P/N 8490 axle bolt, 3/8 in. wave spring washer and
3/8-16 in. Whiz locknut. Tighten the axle bolt until
the wheel rolls freely, but is not loose.
PTO Tube
Pull Back Spring-Loaded
Coupler Ring
Quick Coupler Installation Tool
23
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Assembly Instructions
4. Reaching under the tractor, join the PTO tube to
the PTO shaft (align arrow decals). Slide the
PTO tube onto the spline shaft on the tractor
PTO gearbox.
Spring-Loaded Coupler Ring
In Fully Forward Position
NOTE: When installing the DSD52 Mower
deck, make sure to retract the dolly wheel after
mounting the deck on the tractor.
Grease Deck
Support Arms
Coupler Ring “Locked” Position
8. Raise the mower body (instead of lifting the
front of deck) and clip the counterweight springs
to the receptacle on front of body. Lower the
body to tension the springs. (Refer to Deck
Counterweight Spring Installation photo.)
PTO Connection
Arrows on Shaft and Tube
(used to align when sliding together)
Mower Deck Installation
(PTO Shaft Connection)
9. With the counterweight springs connected, the
weight on the deck caster wheels should be
15 to 25 Ib (6.8 to 11.3 kg); this adjustment is
preset at the factory. If required, the spring ten-
sion can be adjusted by tightening or loosening
the elastic stop nuts located underneath the
lower spring hook, or contact your local dealer if
additional help is required. Refer to Deck
Counterweight Spring Installation photo.
5. Slide the deck the rest of the way on the deck
arms. If the deck is rear discharge (GHS
equipped model), the rear discharge chute will
need to be aligned and connected to the blower
inlet during the last 2 in. (51 mm) of slide action
on the support arms.
NOTE: Raising the mower body may be help-
ful in fitting and guiding the deck chute into the
blower.
Spring Tension Adjustment
Nut Located Under Lower
Spring Hook (Not Visible)
6. Install the hitch pin through the hole on the end
of each support arm to lock the deck in place
(refer to Deck Counterweight Spring Installa-
tion photo). Two (2) hitch pins are included in
the owner's packet of materials.
7. Remove Installation Tool from coupler ring and
make sure the ring has “snapped” securely on
the spline shaft.
Counterweight Springs Clip
Onto Body With Forward
Body Tilted Up
IMPORTANT: DO NOT operate tractor with
Quick Coupler Installation Tool installed.
Hitch Pins
Lock Deck On
Support Arms
IMPORTANT: To prevent damage to the
mower, make sure the PTO shaft assembly is
securely locked on the tractor, with the locking
balls fully seated in the groove and the ring in the
full forward position (refer to the Coupler Ring
“Locked” Position photo). After installation,
pull on the shaft to check for security.
Deck Counterweight Spring Installation
24
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Assembly Instructions
2. Check the side-to-side level. Rotate each blade
sideways and measure the distance from blade
tip to ground on each side. If measurements
vary more than 1/8 in. (3 mm), add a washer
shim under the deck support pins on the low side
to level the deck.
Deck Leveling
1. Position mower on a smooth, level surface. Set
the cutting height to the highest position - 4 in.
(102 mm) - for easy access under the deck to
measure blade height. Refer to ADJUSTING
CUTTING HEIGHT in Operating Instructions.
3. Check the front-to-rear level. Rotate the blades
to point forward. Measure the distance from
blade tip to ground on the front and rear. The
rear of the blade should be 1/8 to 1/4 in.
(3 to 6 mm) higher than the front of the blade;
shim the rear (or front) deck support pins
equally to achieve at least 1/8 in. (3 mm) differ-
ence.
NOTE: A block of wood cut 4 in. (102 mm) high
is a convenient gauge to measure blade height
above ground during the leveling process.
WARNING
The machine must be shut off during this
procedure.
NOTE: The mower deck and support frame are
jig welded; within normal tolerances, very little, if
any, shimming should be required to level the
deck. Tire pressure will influence the levelness
of the deck. Check the tire pressure as a possi-
ble cause of the deck not being level.
4 in. (102 mm)
Wood Block
Should be 1/8 in. (3 mm)
to 1/4 in. (6 mm) higher
at the rear of the blade
Should not vary more
than 1/8 in. (3 mm)
side-to-side
4 in. (102 mm)
Wood Block
Deck Leveling
25
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Assembly Instructions
PREOPERATING CHECKLIST
IMPORTANT: DO NOT mix oil with gasoline. Al-
ways use fresh, automotive grade gasoline. DO
NOT use premium, white, or high-test gasoline. DO
NOT use additives, such as carburetor cleaners, de-
icers, or moisture removing agents. DO NOT use
gasoline blended with methyl alcohol.
Before operating the mower for the first time, and as
a routine before daily operations, it is important to
make sure the mower is properly prepared and
ready for operation. The following is a list of items to
be checked. (For a mower with frequent operation,
some of these items will not need to be checked ev-
ery day, but the operator should be aware of the con-
dition of each.)
CHECK ENGINE CRANKCASE OIL LEVEL
Check the engine crankcase oil level before use and
after each 8 hours of continuous operation. Refer
to LUBRICATION for Checking Engine Crankcase
Oil Level in Maintenance Instructions.
For proper fuels and lubricants refer to Specifica-
tions.
CHECK AND SERVICE ENGINE AIR CLEAN-
ER SYSTEM
FILL FUEL TANK
Fill the fuel tank using clean, fresh automotive grade
Check air restriction gauge to make sure there
unleaded gasoline (87 octane rating minimum).
is no red indication showing.
DANGER
Check condition, cleanliness, and security of
the complete air cleaner system (every 100
hours). For detailed procedures, refer to
CLEANING the Engine Air Cleaner System in
Maintenance Instructions.
Handle gasoline with care. Gasoline is
highly flammable and its vapors are ex-
plosive. Use safe refueling procedures:
CHECK ENGINE COOLING SYSTEM - Model
MT and MTEFI
DO NOT fill fuel tank with the engine run-
ning.
Check that the engine cooling air intake screen is
free of obstruction by grass clippings or debris and
clean if required. Also, cylinder head cooling fins
should be inspected and cleaned if any build-up of
debris is noted [remove two (2) cylinder head ac-
cess panels to inspect and clean].
If the engine is hot, allow to cool before
refueling.
Use an approved fuel container.
Fuel the mower outdoors.
DO NOT smoke while refueling.
Avoid spilling fuel; use a funnel or spout.
Check performance of the cooling system by start-
ing the engine, holding a hand adjacent to the cylin-
der heads, and feeling the cooling airflow.
DO NOT overfill the fuel tank; fill up to
DANGER
about 1 in. (25 mm) below the top of tank.
Make sure to keep hands clear of exhaust
pipe, muffler, and moving parts when
checking airflow.
IMPORTANT: DO NOT permit dirt or other foreign
matter to enter the fuel tank. Wipe dirt from around
the filler cap before removing. Use a clean fuel stor-
age container and funnel.
26
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Assembly Instructions
CHECK ENGINE COOLING SYSTEM - Model
MTL and MTLEFI
CHECK TIRE PRESSURE
Deck Caster Wheel = 20 PSI (137 kPa)
Check the radiator air intake screen to make
sure the screen is clean and free of obstruction.
Also, the radiator cooling fins should be
inspected and cleaned if there is any buildup of
dirt or debris. (Remove the intake screen
assembly to inspect and clean.)
Drive
=
15 PSI (103 kPa)
Rear
=
20 PSI (137 kPa)
CHECK AND CLEAN GRASS BUILDUP
UNDERNEATH MOWER DECK (and inside
GHS blower, if equipped)
Check the coolant levels in the radiator and over-
flow tank. If additional coolant is needed, refer to
CHECKING/SERVICING the Engine Cooling
System - MTL and MTLEFI in Maintenance
Instructions.
Refer to CLEANING the GHS Blower in Mainte-
nance Instructions for blower cleaning information.
DANGER
Never operate cutter blades with deck in
raised position because it is hazardous.
WARNING
DO NOT remove the radiator pressure cap
when engine is hot.
The tilt-up deck can be secured in the raised position
by unlocking the deck lock levers on each side of the
carrier frame and inserting the deck hook into the tilt-
up latch on the tractor body. Before operating the
tractor, make sure to re-engage the deck lock levers
after lowering the deck to the normal operating po-
sition.
CHECK GEAR AXLE OIL LEVEL
Refer to LUBRICATION for Gear Axle Lubrication
in Maintenance Instructions.
INSPECT FOUR (4) DRIVE BELTS
Tilt-Up Latch
Engine PTO Drive, Jackshaft Drive, Hydrostatic
Ground Drive, and GHS Blower Drive (if equipped).
CHECK HYDROSTATIC TRANSMISSION OIL
LEVEL
Tilt-Up Latch
Refer to LUBRICATION for Checking Hydrostatic
Transmission Fluid Level in Maintenance Instruc-
tions.
Tilt-Up Hook
on Deck
CHECK FUNCTIONS OF INSTRUMENT PANEL
AND WARNING HORN
Deck Lock Lever
Turn the ignition key to the RUN position. Voltmeter,
Oil Pressure Light, and Warning Horn should all op-
erate, indicating normal function.
Deck Secured in TILT-UP Position
CAUTION
CHECK FUNCTION OF SAFETY INTERLOCK
SWITCHES
Do not operate machine with deck tilt-up
pivot joint unlocked.
Refer to Operating Instructions to check for proper
operation of safety switches, both during engine
starting and with this operator leaving the seat with
tractor moving forward or with the mower blades en-
gaged.
27
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Assembly Instructions
CHECK DRIVE WHEEL BOLT TORQUE
DANGER
The lug bolts mounting the drive tires should be
tightened to 75 to 85 ft-lbs. (101.7 to 115.2 N·m).
Do not operate the mower with deck in tilt-
up position. Do not move the tractor with
the deck in the tilt-up position.
PERFORM ANY ADDITIONAL PROCEDURES
called for on the MAINTENANCE SCHEDULE
CHART in Maintenance Instructions.
CHECK MOWER BLADE CONDITION, SHARP-
NESS, AND SECURITY OF MOUNTING
The blade mounting nut should be tightened to
60 ft-lb (81.3 N·m). If blade sharpening is required,
refer to CHECKING/SERVICING for Sharpen
Mower Blades in Maintenance Instructions.
ADJUST MOWER CUTTING HEIGHT, IF RE-
QUIRED
Position the hitch pins in the four deck support pins.
Refer to the “Cutting Height Adjustment” decal on
the deck gearbox cover.
28
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Operating Instructions
CONTROL IDENTIFICATION, LOCATION, AND
FUNCTION
Engine Choke - (Model MT and MTL only)
The choke control lever (black knob) is located on
the left side of the seat. To start a cold engine, move
the choke control forward to the ON position. After
engine starts, move the choke control toward the
OFF position, keeping enough choke to allow the
engine to run smoothly as it warms up. As soon as
possible, move the choke to the OFF position. A
warm engine requires little or no choke for starting.
Operating Controls
CAUTION
Before operating the mower, become fa-
miliar with the location and function of all
operator controls. Knowing the location,
function, and operation of these controls
is important for safe and efficient opera-
tion of the mower.
IMPORTANT: Make sure the choke is in the OFF
position during normal engine operation; running
with the choke in the ON position CAN damage the
engine.
Forward Speed Control
(FSC)
Steering Levers
Front Body
Latch Release
(not visible)
Parking
Brake
Blade Clutch (PTO)
Operating Controls
29
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Operating Instructions
Steering Levers
Each drive wheel is controlled by its own indepen-
dent steering lever, for both steering function and
FORWARD/REVERSE motion. The FSC lever sets
the maximum forward speed, and also sets the for-
ward position of the steering levers. The steering le-
vers operate only with a backward pulling
movement of the lever, which causes the drive
wheel for that lever to first slow down, stop, and then
reverse with a full backward lever stroke. The levers
are released to the FORWARD position for “straight-
ahead” ground travel.
Throttle
Choke
NOTE: Pushing forward on the steering levers will
not cause any change in tractor motion - there will
be no steering lever reaction and there will be no
machine damage.
Choke and Throttle Location (MT and MTL)
Engine Throttle
The throttle control lever (red knob) is located on the
left side of the seat and is used to control engine
speed. Moving the lever forward toward the FAST
position increases engine speed; moving it back-
ward toward the IDLE position decreases engine
speed.
Blade Clutch (PTO)
The blade clutch lever has two positions. Pulling the
lever UP engages the PTO that drives the mower
blades. Pushing the lever DOWN disengages the
PTO and engages the blade brake.
Forward Speed Control (FSC)
®
NOTE: On GHS equipped models, the Powerfil
®
motor and Grass-Pak full signal switch are activat-
Forward Speed Control (FSC) has two functions:
One is to set forward travel speed, and the other is
to establish the NEUTRAL-PARK position. When
the FSC lever is moved into the FORWARD posi-
tion, a friction lock holds any forward speed setting
from 0 to 5 mph (0 to 8 km/h). The ground speed is
proportional to the lever position; the further the le-
ver is advanced forward, the faster the tractor
moves. It is not necessary to hold the FSC in posi-
tion since the friction lock maintains the selected le-
ver position. Pulling back on the steering levers
overrides the FSC setting and slows or stops for-
ward travel. Releasing the steering levers allows
the tractor to resume forward travel at the speed set
by the FSC lever. To stop and park the machine, the
FSC lever is moved backward to the NEUTRAL-
PARK position.
ed by engaging the blade clutch. Refer to Using the
GHS Catcher in this section for a complete descrip-
tion of GHS operation.
Parking Brake
The parking brake functions by locking a pin into the
hydrostatic transmission pinion gear teeth. Moving
the lever FORWARD engages the parking brake;
moving the lever BACKWARD releases the brake.
IMPORTANT: Stop the tractor completely before
engaging the parking brake. The parking brake
uses a positive mechanical lock similar to the PARK
position on an automotive automatic transmission.
If the tractor is moving when the brake is engaged, it
will result in sudden stoppage and possible internal
damage to the axle drive.
NOTE: If pressure on the parking brake pin (e.g.
parked on a hill) makes it impossible to release the
parking brake with the parking brake lever, move the
mower gently forward or backward to release the
pin.
30
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Operating Instructions
The Forward Speed Control also Establishes the Neutral-Park Position of the Steering Levers
LEFT WHEEL
STEERING LEVER
RIGHT WHEEL
STEERING LEVER
FORWARD SPEED
CONTROL LEVER (FSC)
Full Forward
Ground Speed
Position
Forward Position
(No Control Change)
Intermediate
Ground Speed
Position
Neutral-Park
Position
Reverse Drive
Wheel Motion
Position
Neutral-Park
Position
Engaged
Position
PARKING
BRAKE
Disengaged
Position
MTL
MTEFI
Fast
MT
Disengaged
Position
Throttle
Position
Idle
Position
THROTTLE
MTLEFI
ON Position
Engaged
Position
BLADE CLUTCH (PTO)
Pull Up to Engage
OFF Position
CHOKE (MT & MTL)
MT, MTEFI, MTL, and MTLEFI Operating Controls (Top View from Drivers Point of View)
31
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Operating Instructions
Front Body Latch Release
NOTE: The transmission plunger on the side of the
transmission case (activated by the LOCKOUT LE-
VER) must be completely released during operation
of the mower, otherwise operation of the transmis-
sion will be erratic.
The front portion of the tractor body hinges forward
for maintenance access and is latched down in the
OPERATING position. To raise the body, move the
latch release forward.
Optional Cold Start Lever
(Jackshaft Drive Belt Release)
The cold start lever is used for starting the machine
in cold weather [below 40° F (4° C)]. Pulling the le-
ver UP disengages the jackshaft drive belt. When
the jackshaft drive belt is released, the hydrostatic
transmissions are removed from the engine starter
cranking load.
Front Body
Latch Release
Front Body Latch Release
Cold Start Lever
Disengaged
Transmission Lockout Levers
The transmission lockout levers disengage the hy-
drostatic transmissons. By lifting the lever on top of
the transmission and locking it into place with the
lockout cam, the hydrostatic transmissions are re-
leased to permit freewheeling. By releasing the cam
and lowering the lever, the transmissions are en-
gaged for normal operation. The transmission lever
in the LOCKOUT position is used to enable moving
the machine without the engine running (e.g., for
service). Refer to TRANSMISSION LOCKOUT in
this section for operating instructions.
Optional Cold Start Lever
Normal Operating Position
Cold Start Lever
Engaged
Lockout
Levers
Optional Cold Start Lever
Cold Start Position
Transmission
Plunger
Lockout Lever Location
32
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Operating Instructions
Suspension Seat (MTL and MTLEFI)
CAUTION: Before the tractor is used, the safety
switch must be checked for proper function. The
operation of the switch is checked by having the op-
erator lift off the seat with the tractor moving forward
and/or the blades engaged -- this action should
cause the machine to stop. If a malfunction is de-
tected the tractor must not be driven, it should be re-
paired or replaced before operating the mower.
A fully adjustable suspension seat is standard on
Models MTL and MTLEFI. This seat is adjustable
for back pitch, weight, lumbar support and armrest
inclination. Proper adjustment for each operator is
essential to safe operation and operator comfort.
Read operating instructions in full before you use
the seat.
CAUTION
NOTE: Driver seats that have been adjusted incor-
rectly have little or no vertical travel with the operator
in the seat. To prevent damage to the driver’s back
and to the seat, the seat must be adjusted for the
driver’s weight before use and before every
change of driver. To prevent injury, no objects
should be placed within the moving area of the
driver seat.
Except for the driver’s weight during nor-
mal use, no loads must be placed on
seats with a built-in switch detecting seat
occupation, as the vehicle may otherwise
start to move by itself.
For armrest inclination adjustment, the inclina-
tion of the armrests can be modified by turning the
adjustment knob. Refer to Figure 1.
CAUTION
To eliminate any risk of accident, the set-
tings must be checked to ensure they are
correctly engaged before the mower is
driven.
Turning the knob to the right lifts the armrest in front,
turning it to the left, lowers it in front.
For weight adjustment, the weight of the respec-
tive driver must be set while sitting on the seat. Fold
out the weight adjustment handle completely, hold it
at the front and move it upwards or downwards (10
movements from minimum to maximum).
Adjustments must not be made while driving.
If you make any changes to the suspension seat
(for example fitting parts which are not original
GRAMMER parts) it may no longer meet the safety
standards to which it is tested. Functions may be
impaired, threatening your safety. For this reason,
any change in design of the seat must be ap-
proved by GRAMMER (Seat Manufacturer).
Before every new movement, bring the handle back
to the starting position (audible locking sound). The
driver’s weight has been set correctly, when the ar-
row is in the middle of the viewing window. Refer to
Figure 2.
IMPORTANT: To prevent injury to the operator and/
or damages to the seat, the setting for the driver’s
weight must be checked and adjusted as necessary
before the mower is driven.
IMPORTANT: Fasteners must be checked regu-
larly for tightness. If the seat wobbles there may
be loose bolts or other faults.
If you note that the seat does not function correctly
(for example a defective seat suspension; improper
curving of the lumbar support or damaged bellows),
contact your Walker dealer immediately to ar-
range for repairs to be carried out. If you fail to do
so, your health may be affected and the risk of ac-
cident increased.
When the minimum/maximum weight adjustment
has been reached, you will notice an empty move-
ment in the handle.
When you have set the weight, fold the handle com-
pletely into the locking position.
33
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Operating Instructions
For Backrest adjustment, moving the adjustment
handle upwards loosens the notching of the back-
rest adjustment. Refer to Figure 3.
For adjusting the height of the armrest, pry out the
round cap (arrow) of the cover and loosen the hexa-
gon nut (size 13mm) situated behind it. Set the arm-
rests in the desired position (5 steps) and tighten the
hexagon nut. Replace the cap onto the nut. Refer
to Figure 4.
After the adjustment, the handle must lock in the de-
sired position. It should not be possible to move the
backrest into another position when it is locked.
For Lumbar Support adjustment, turning the knob
upwards sets the curve in the upper part of the back
upholstery. Turning the knob downwards sets the
curve in the lower part of the upholstery. Refer to
Figure 5.
For Armrest height adjustment, the armrests can
be folded back if required and the height individually
adjusted.
IMPORTANT: Dirt can impair the function of the
seat, so make sure you keep your seat clean!
For cleaning, use a standard commercially avail-
able upholstery or plastics cleaning agent. Test
first for compatibility on a small, concealed area.
Figure 5
Figure 1
Remove
Cover
Figure 4
Figure 2
Figure 3
34
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Operating Instructions
Instrument Panel
This illustration shows the configuration of the
switches and indicators located on the instrument
panel.
Oil Pressure
Warning Light
Over Temperature
Warning Light
Voltmeter
Hourmeter
Ignition
Switch
MT
7 AMP
Circuit Breaker
Light Switch
(Optional)
Warning
Horn
Over Temperature
Warning Light
Oil Pressure
Warning Light
Voltmeter
MTEFI
Service
Engine
Soon Warning
Light
Light Switch
(Optional)
7 AMP
Circuit Breaker
Warning
Horn
Hourmeter
Ignition
Switch
Instrument Panel
35
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Operating Instructions
Water
Temperature
Water Temperature
Warning Light
Oil Pressure
Warning Light
Gauge
Voltmeter
Ignition
Switch
MTL
7 AMP
Circuit Breaker
10 AMP
Circuit Breaker
Warning
Horn
Light Switch
(Optional)
Hourmeter
Water
Temperature
Gauge
Water Temperature
Warning Light
Oil Pressure
Warning Light
Voltmeter
Ignition
Switch
MTLEFI
Service
Engine
Soon Warning
Light
7 AMP
Circuit Breaker
10 AMP
Circuit Breaker
Light Switch
(Optional)
Hourmeter
Warning
Horn
36
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Operating Instructions
Hourmeter
Voltmeter
The hourmeter, which is located on the instrument
panel, displays operating time accumulated while
the ignition switch is in the ON position.
The voltmeter displays battery and charging system
voltage. An indication of low or high voltage (the red
area) indicates an electrical system failure. The
cause of the failure should be determined and cor-
rected.
The hourmeter provides maintenance reminders
after certain hours of operation. The hourmeter
screen will start flashing the reminder one hour prior
to the recommended interval and will continue until
one hour after the recommended interval (two
hours). The hourmeter does not have a manual
reset function.
Oil Pressure Warning Light
The oil pressure warning light indicates that engine
oil pressure is below the safe operating level [below
3 to 5 PSI (21 to 34 kPa)]. This light (and warning
horn)willcomeonwhentheignitionisturnedON, but
should go off after the engine is started. If the light
failstocomeonwhentheignitionswitchisturnedON,
it could indicate a burned out bulb. If the light comes
on during engine operation, stop the engine imme-
diately and correct the source of the problem before
further engine operation.
Procedure
Interval*
Reminder
C
H
G
Oil Change
(Break-In)**
4-6 Hours
OIL
Lubricate
and Check
Levels
24-26 Hours
LUBE
IMPORTANT: Continued operation of the engine
with an illuminated oil pressure warning light MAY
cause severe engine damage (if a low oil pressure
condition exists).
C
H
G
Oil Change
49-51 Hours***
OIL
*
These intervals reflect the actual time that the
reminder will flash (one hour prior to and one
hour after the recommended interval).
Over Temperature Warning Light
(Model MT and MTEFI Only)
** This reminder is only used one time.
The over temperature warning light indicates that
engine oil temperature and/or cylinder head temper-
ature are above the safe operating limit and the en-
gine is overheating [above 305° F (152° C) oil or
450° F (232° C) cylinder head]. If this light comes
on, there may be a problem with:
*** In normal operating conditions, oil changes in
100-hour intervals are acceptable. Walker and
the engine manufacturers recommend engine
oil changes every 50 hours in extremely dirty
or dusty conditions or for units with less than
100 hours annual use.
Engine cooling system (material packed into cyl-
NOTE: The blinking hour glass on the display
means that the meter is operating properly.
inder head cooling fins, clogged air intake screen)
Low oil level in crankcase
Stop the engine and correct the source of the prob-
lem before further operation.
IMPORTANT: Continued operation of the engine
with an illuminated over temperature warning light
MAY cause severe engine damage (if a high oil tem-
perature or head temperature condition exists).
Hourmeter
37
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Operating Instructions
Water Temperature Warning Light
(Model MTL and MTLEFI Only)
Ignition Switch
The ignition switch is used to start and stop the en-
gine. The switch has three positions: “O” is the OFF
position, RUN is the position the key returns to after
starting, and “S” is the START position. When start-
ing the engine, turn the key clockwise to the “S” po-
sition. Do not hold the key in the “S” position longer
than 10 seconds. If the engine does not start, return
the key to the “O” position for at least 60 seconds be-
fore making a restart attempt. Prolonged cranking
can damage the starter motor and shorten battery
life. Release the key when the engine starts, and it
will return to the “RUN” position. To stop the engine,
rotate the key counterclockwise to the “O” position.
The water temperature warning light indicates that
engine coolant temperature is above the safe oper-
ating limit and the engine is overheating. If this
light comes on, there may be a problem with:
Radiator cooling air flow (material packed into
radiator cooling fins, clogged air intake screen)
Cooling fan not operating
Low coolant quantity in cooling system
Water Temperature Gauge
(Model MTL and MTLEFI Only)
OFF
The water temperature gauge monitors engine
cooling system temperature. If engine coolant
temperature exceeds 230° F (110° C), an overheat
condition exists; the water temperature light will
come on and the warning horn will sound.
ON
WARNING
If engine cooling system overheating is
indicated, continued operation of the en-
gine, even for a short time, COULD result
in fire, risk of personal injury, and severe
damage to equipment.
START
Ignition Switch
Engine Service Light
Light Switch (For Optional Lights)
(Model MTEFI and MTLEFI Only)
Operates headlights (when installed).
The engine service light indicates the Engine Con-
trol Unit (ECU) has detected a fault in the engine
performance. When this light illuminates during op-
eration, contact an authorized Kohler Service dealer
to diagnose the fault.
Warning Horn
The warning horn sounds to alert the operator that
an unsafe engine condition is being indicated -
when engine temperature is too high or engine oil
pressure is too low. If the horn sounds, check the
indicator lights and correct the problem before fur-
ther operation.
IMPORTANT: Continued operation of the engine
with an illuminated engine service light will result in
sub-standard performance and MAY cause engine
damage if not corrected as soon as possible.
38
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Operating Instructions
Circuit Breakers
CAUTION
Depending on model, either one or two manual reset
circuit breakers are located on the instrument panel.
Each has a button that pops out if the circuit breaker
trips. For Models MT, MTEFI and MTLEFI, the 7 amp
circuit breaker protects the safety circuits and GHS.
For Model MTL, the 7 amp circuit breaker protects
the warning lights/horn, safety circuits and GHS. For
Model MTL, the 10 amp circuit breaker protects the
headlights. For Model MT, the 30 amp circuit breaker
(located near the battery) protects the instrument
panel and headlights. For Model MTL, the two (2) 30
amp circuit breakers protect the instrument panel,
starter solenoid and ’fan’ control module. ForModels
MTEFI and MTLEFI, the 30 amp circuit breaker pro-
tects the instrument panel, headlights, and starter
solenoid, and a 20 amp fuse protects the ECU.
A safety interlock switch system PRE-
VENTS CRANKING the engine with either
the Forward Speed Control or the blade
clutch (PTO) out of neutral. If the engine
cranks otherwise, the safety system is not
working and should be repaired or ad-
justed before operating the mower. DO
NOT disconnect safety switches; they are
for the operator’s protection.
NOTE: For starting in cold weather [below 40° F
(4° C)], use the optional cold start lever to release
the jackshaft drive belt and remove the hydrostatic
transmission from the starter cranking load. After
the engine has been started and warmed up, lower
the lever to re-engage the jackshaft drive belt.
STARTING THE ENGINE
CAUTION
Before operating the mower, read and un-
derstand all Safety Instructions and Operat-
ing Instructions.
Cold Start Lever
Engaged
WARNING
NEVER run the engine in an enclosed or
poorly ventilated area. Engine exhaust
contains carbon monoxide, an odorless
and deadly gas.
Optional Cold Start Lever
2. For Model MT and MTL, move the choke lever to
the ON position and move the throttle 1/4 to 1/2
open (toward FAST). Turn the ignition switch to
the START position to start the engine. Release
the key to RUN position as soon as the engine
starts.
1. Before attempting to start the engine, make
sure the operator is in the seat, the Forward
Speed Control is in NEUTRAL-PARK position,
and the blade clutch and parking brake are
DISENGAGED.
NOTE: For Model MT and MTL, the choke
may not be required if the engine is warm.
NOTE: Release parking brake to prevent extra
load on the starter if the transmission neutral is
slightly out of adjustment.
IMPORTANT: If the engine fails to start after
approximately 10 seconds of cranking, the en-
gine should be checked before further cranking.
Turn the key to the OFF position and allow a
60 second cool-down period between starting
attempts. Failure to follow these guidelines can
damage the starter motor and shorten battery
life. Consult your Walker dealer or Authorized
Kohler dealer for additional help.
39
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Operating Instructions
3. After the engine starts, make sure the oil pres-
sure light goes off. If not, stop the engine imme-
diately and find the cause of the problem. Make
sure the oil pressure light is off prior to engaging
the mower blades and beginning operation.
CAUTION
A safety interlock switch (seat switch) will
cause the engine to stop if the FSC is out
of the NEUTRAL-PARK position and the
operator is not in the seat. The function of
this switch should be checked by the op-
erator raising off the seat with the tractor
moving forward (allow 1 to 1-1/2 seconds
off the seat for the time delay function);
the engine should stop. If the safety sys-
tem is not working, it should be repaired
or replaced before operating the mower.
DO NOT disconnect the safety switches;
they are for the operator's protection.
4. For Model MT and MTL, gradually move the
choke to the OFF position, keeping enough
choke on to allow the engine to run smoothly
as it warms up. As soon as possible, move the
choke to the OFF position.
IMPORTANT: For Model MT and MTL, make
sure the choke is in the OFF position during nor-
mal engine operation; running with the choke in
the ON position CAN damage the engine.
ADJUSTING GROUND SPEED AND STEERING
NOTE: If the FSC lever will not stay in the
selected position, the friction lock needs to be
adjusted. Contact your Walker dealer.
IMPORTANT: If the DSD52 or DSD62 Mower deck
is installed on the tractor, make sure the dolly wheel
is retracted BEFORE moving.
2. Steer by pulling the lever on the side of desired
direction of turn, e.g., pull the LH lever to turn
left. To minimize the possibility of overcontrol,
use only one hand on both steering levers.
CAUTION
Learn to START, STOP, and MANEUVER
the mower in a large, open area.
If the operator has not operated a ma-
chine with LEVER STEERING OR DUAL
HYDROSTATIC TRANSMISSIONS, steer-
ing and ground operation should be
learned and practiced until the operator is
completely comfortable handling the ma-
chine BEFORE ATTEMPTING TO MOW.
DANGER
Keep feet on footrests at all times when
the machine is moving. Never operate the
tractor without a deck or implement in-
stalled.
1. Move the FSC out of NEUTRAL-PARK
position to the desired forward speed. DO
NOT hold forward on steering levers. It is not
necessary to hold the FSC lever in position
since a friction lock maintains the selected
lever position (and forward travel speed).
40
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Operating Instructions
Pull Steering Levers
With Left Hand
Beginning Recommendations are:
Learn operation of the mower in an open
area away from buildings, fences, and ob-
structions. Learn operation on flat ground
BEFORE operating on slopes.
Start maneuvering the mower with SLOW
engine speed and SLOW Forward Speed
Control setting until familiar with all operat-
ing characteristics.
Forward Speed Control
(FSC)
Remember it is not necessary to hold the
steering levers forward (a unique Walker
feature); always PULL on the levers for
steering or for reverse motion of the mower.
Keep Feet On Footrest
When Moving
Correct Operator Hand Position
Learn to operate the mower with your left
hand on the steering levers and right hand
on Forward Speed Control. The use of two
hands on the steering levers tends to cause
overcontrol.
on the Controls
3. Reverse direction of the mower by pulling both
levers backward.
NOTE: Smooth action on the steering levers
will produce smooth mower operation. Remem-
ber to keep the engine and ground speed slow
until learning the control response.
Learn to operate the steering levers with
smooth action. Jerky movements are hard
on the transmission and lawn. For sharp
turns, do not allow the inside wheel to stop
and twist on the grass. Pull the steering le-
ver controlling the inside wheel into reverse
for a smooth “rolling” turn (one wheel roll-
ing forward while the other rolls backward).
4. The FSC may be adjusted forward for faster
ground speed and backward for slower ground
speed. When mowing, ground speed should be
adjusted to match the load on the cutter blades,
i.e., as the engine pulls down in heavy cutting,
pull back on the FSC lever to reduce ground
speed. Adjusting ground speed helps maintain
a balance between engine power and blade
speed for high-quality cutting action.
Practice maneuvering the mower until
you can make it go exactly where you are
aiming.
Remember, for an emergency stop, or in
case of loss of control, machine movement
can always be stopped quickly by pulling
the Forward Speed Control into the NEU-
TRAL-PARK position.
5. Stop ground travel by pulling both steering le-
vers backward to the NEUTRAL position (trac-
tor not moving) and then moving the FSC lever
to the NEUTRAL-PARK position.
NOTE: If the tractor creeps forward or back-
ward with the FSC lever in the NEUTRAL-PARK
position, the transmission control needs to be
adjusted. Contact your Walker dealer.
41
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Operating Instructions
ENGAGING THE MOWER
1. Set the engine throttle at about 1/3 speed. Do
not attempt to engage the blade clutch at
high engine speeds. This will drastically short-
en drive belt life. Use only moderate engine
speed when engaging the blade clutch.
2. Pull the blade clutch lever SLOWLY up to en-
gage the mower blades.
CAUTION
A safety interlock switch (seat switch) will
cause the engine to stop if the blade
clutch is engaged and the operator is not
in the seat. The function of this switch
should be checked by the operator rais-
ing off the seat and engaging the blade
clutch; the engine should stop. If the
switch is not working, it should be re-
paired or replaced before operating the
mower. DO NOT disconnect the safety
switches; they are for the operator’s pro-
tection.
Engaged
Position
Blade Clutch Engaged
IMPORTANT: DO NOT engage the blade clutch
when transporting the mower across drives, side-
walks, loose materials, etc. DO NOT engage the
blade clutch with the PTO shaft disconnected
(the mower deck removed from tractor).
CAUTION
Disengaged
Position
If the cutting blades strike a stationary ob-
ject while mowing, stop the mower imme-
diately, disconnect the spark plug wires,
lift the deck, and inspect the deck and
blades thoroughly for damage. Make sure
that the blade timing has not been dis-
turbed (the blades should be at 90 degrees
to each other). Refer to REPLACING/RE-
PAIRING the Blade Overload Shear Bolts
in Maintenance Instructions if blades are out
of time. Also, make sure the blade retain-
ing nuts are torqued to 60 ft-lb (81.3 N·m).
Blade Clutch Disengaged
42
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Operating Instructions
STOPPING THE MACHINE
IMPORTANT: The hydrostatic transmissions
lock to prevent the mower from rolling freely with
the engine stopped. However, if the mower is
parked on a slope, it is necessary to ENGAGE
the parking BRAKE to prevent the mower from
creeping. This is due to a small amount of slip-
page in the hydrostatic transmissions, especially
when transmission fluid is warm.
1. Pull the steering levers to the NEUTRAL posi-
tion and then move the FSC lever backward to
the NEUTRAL-PARK position.
2. Slow the engine to a fast idle; put the throttle in
the 1/2 throttle position.
3. Disengage the blade clutch.
WARNING
IMPORTANT: DO NOT disengage the blade
clutch with high engine speed (above 1/2 throt-
tle) since the brake action on the blade drive will
cause premature wear of the brake band.
In case either of the transmission drive
belts break during operation, and if the
machine is on a slope, the machine will
freewheel down the slope. To maintain
control, immediately (1) Release the
steering levers and simultaneously (2)
Move the FSC to the NEUTRAL-PARK
position. When the machine is stopped or
moving slowly, engage the parking brake.
WARNING
A brake stops the cutter blades (and blow-
er on GHS equipped models) from free-
wheeling within five (5) seconds after
disengaging the clutch. If the brake sys-
tem malfunctions and the blades do not
stop within five (5) seconds, the brake
should be adjusted or repaired before op-
erating the mower. Contact your Walker
dealer.
NOTE: The emergency stop procedure is ex-
actly the same procedure as used to normally
stop and park the machine.
4. Turn the ignition switch OFF. When stopping
the engine, do not reduce the throttle below 1/2
speed. Since the engine is equipped with a
shutdown solenoid, stopping at low idle may
cause engine run-on or backfiring.
WARNING
Remove the key from the ignition switch
when leaving the mower unattended. This
will prevent children and inexperienced
operators from starting the engine.
5. Engage the parking brake. Also, engaging the
parking brake is recommended when stopping
or parking the machine in a confined space with
little tolerance for movement.
43
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Operating Instructions
ADJUSTING CUTTING HEIGHT
3. The mower will “freewheel” with the levers in the
LOCKOUT position. The levers must be in the
highest position to completely unlock the trans-
missions.
WARNING
The engine must be stopped before ad-
justing cutting height. Disengage the
blade clutch (PTO), stop the engine, and
remove the ignition key. Wait for all move-
ment to stop before getting off the seat.
Lockout Lever
Cutting height is adjusted by positioning the four re-
tainer hitch pins in a series of seven vertical holes
on the deck support pins. Lift handles have been
provided on each end of the deck to assist in raising
the deck while positioning the hitch pins. Cutting
heights range from 1 in. (25 mm) [top holes] to 4 in.
(102 mm) [bottom holes] in 1/2 in. (13 mm) incre-
ments.
Plunger
Depressed
Cam in
LOCKOUT
Position
Lift Handle
Lockout Lever - Freewheel Position
4. After moving the mower, release the locking
cam, placing the lever DOWN in the normal OP-
ERATING position. Make sure the transmission
lockout plunger on the side of the transmission
case (activated by the lockout lever) is com-
pletely released, otherwise the transmission
operation will be erratic.
Deck Support
Pin
Hitch Pin
Lockout Lever
Cutting Height Adjustment
TRANSMISSION LOCKOUT
IMPORTANT: DO NOT TOW the tractor with the
transmission lockout engaged. Towing can produce
excessive internal pressure and damage the trans-
mission.
Cam in
UNLOCKED
Position
Plunger
Released
To move the mower with the engine NOT running
(dead battery, maintenance, etc.), the hydrostatic
transmissions are unlocked (released).
1. Raise the front body.
2. Lift the transmission lockout lever on both the
RH and LH transmissions and secure into place
with the locking cam.
Lockout Lever - Normal Operating Position
44
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Operating Instructions
RECOMMENDATIONS FOR MOWING
When mowing, operate the engine at or near full
throttle for the best cutting action and performance
of the grass handling system (GHS). Mowing with a
lower engine RPM causes the mowing blade to not
cut clean and tear the grass. The engine is
designed to be operated at full speed.
DANGER
Do not mow around overhanging tree
branches or bushes at the same height as
the operator’s torso and head where inad-
vertent contact may cause injury.
When mowing in adverse conditions (tall and/or
wet grass), mow the grass twice. Raise the mower
to the highest setting - 4 in. (102 mm) - for the first
pass and then make a second pass cutting to the
desired height.
Use a slow setting on the FSC for trimming
operations.
Make sure the mower is leveled properly for a
smooth cut. Refer to Deck Leveling in Assembly
Instructions.
Use an alternating stripe mowing pattern for
best appearance and vary the direction of the stripe
each time the grass is mowed to avoid wear patterns
in the grass.
Avoid damage to the grass by slipping and skid-
ding of the drive tires. Use smooth control move-
ments of the steering levers since the hydrostatic
transmissions are “power boosted controls” and
jerking the levers can easily slip the tires. For sharp
turns, do not allow the inside wheel to stop and twist
on grass; pull inside steering lever into reverse for a
smooth “rolling” turn (one wheel rolling forward while
the other rolls backward).
Avoid Low Hanging Branches
IMPORTANT: Operate the engine at full throttle
when mowing, to allow the engine to produce full
horsepower and to increase efficiency of the engine
cooling system.
Keep the mower deck and discharge chute clean.
Mow with sharp blades. A dull blade tears the
grass (resulting in poor lawn appearance) and uses
extra power (slowing the mowing speed).
It is preferable to cut grass when it is dry and not
too tall. Mow frequently and do not cut grass too
short. (For best appearance, cut off 1/3 or less of
existing grass height.)
45
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Operating Instructions
When using a side discharge mower deck, the
side discharge shield must not be removed and
must be kept in the lowest possible position to
deflect grass clippings and thrown objects down-
ward. Orient the side discharge away from side-
walks or streets to minimize cleanup of clippings.
When mowing close to obstacles, orient the side dis-
charge away from obstacles to reduce the chance of
damage to property by thrown objects.
Maximum Recommended
Side Slope - Do Not Operate
on Steep Slopes
Discharge
Shield
Maximum Recommended Side Slope
Side Discharge Shield in Lowest Position
When operating on a slope, reduce speed and
use caution to start, stop, and maneuver. Avoid
sharp turns or sudden changes in direction. The
maximum recommended side slope operating
angle is 20 degrees or 33% grade.
DANGER
Do not mow or dump grass within 5 feet
(1.5 meters) of an embankment or retain-
ing wall with drop off.
5 FT
MINIMUM
No Driving Zone
46
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Operating Instructions
RECOMMENDATIONS FOR TILT-UP DECK
OPERATION/TRANSPORT
To avoid potential deck and/or tractor damage while
using the tilt-up deck, the following recommenda-
tions are offered:
Do not move the tractor with the deck in the tilt-
up position since both the roller wheels (on the back
of the deck) and the GHS discharge chute may be
damaged by moving the tractor. The tilt-up configu-
ration should only be used when the tractor is
parked.
The tractor body should never be tilted for-
ward with the deck in the tilt-up position. This can
cause the deck to unhook from the tractor and fall
with considerable force, potentially causing deck or
tractor damage and/or bodily injury.
When transporting a tractor with the deck in the
tilt-up position (on a truck or trailer), the deck
should be secured to the vehicle with a strap or
rope (stop vertical movement). This will prevent the
deck from bouncing on the rear roller wheels (caus-
ing breakage). This will also prevent the deck from
unhooking from the tractor and falling, potentially
causing deck or tractor damage. Damage to other
items parked in front of the deck may also occur.
47
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Operating Instructions
GRASS HANDLING SYSTEM (GHS)
GHS Model Only
Exhaust Screen
(Removable)
®
Grass-Pak
Vane Switch
®
Powerfil
Delivery Spout
Catcher
Door Spring
®
Powerfil
Drive Motor
Actuator
Rod
“Full” Signal
Horn
Catcher
Door
PTO
Clutch
Shear Pin
PTO and Blade
Gear Drive
Shear
Grass Catcher
Bolt
Dump Handle
Body Chute
Assembly
Blower
Deck
Discharge Chute
Rear Discharge
Mower Deck
GHS Flow and Components
48
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Operating Instructions
NOTE: When a side discharge or mulching mow-
er deck is installed on the GHS model, a blower
intake cover should be installed in the blower intake
tube. This cover “unloads” the blower and seals
the intake to effectively eliminate power loss and
blower noise when the blower is not being used.
General Information
The Grass Handling System (GHS) consists of a
rear discharge mower deck connected to a 10.5 in.
(27 cm) blower and a rear mounted grass catcher
with 10.0 bushel (352 liters) capacity or optional 7.0
bushel (246 liters) capacity. The GHS blower oper-
ates any time the mower blade clutch is engaged
and moves grass through the rear discharge deck
chute into the grass catcher. Blower airflow is ex-
hausted out the back of the grass catcher, through a
filtering screen. When the grass catcher is full and
needs to be emptied, a “full” signal horn alerts
the operator. When the “full” signal horn sounds, it
is important to stop mowing to prevent overfilling
and clogging of the blower system.
Blower
Intake Cover
IMPORTANT: Normally, the GHS blower operates
with no maintenance or cleaning required. However,
under certain operating conditions, the inside of the
blower housing may accumulate a deposit of dirt,
causing wear and binding of the blower wheel.
Normally, dirt buildup occurs when mowing a com-
bination of dirty and damp grass, especially in
the springtime. When operating in these condi-
tions, check the blower wheel frequently for
binding and clean the blower housing as required.
Refer to CLEANING the GHS Blower in Mainte-
nance Instructions.
Blower Intake Cover
NOTE: An alternative to using the blower intake
cover when a side discharge or mulching deck is
installed on a GHS model is the blower lockout kit
(P/N 7541). The blower lockout kit releases ten-
sion on the blower drive belt and does not require
the blower intake cover.
NOTE: In Autumn, when using the GHS mower to
vacuum leaves, it is recommended to raise the front
of the mower deck 2 to 3 notches [1 to 1-1/2 in. (25
to 38 mm)] higher than the rear. This will avoid
“bulldozing” leaves, particularly when the leaves
are piled in a thick layer. To make this adjustment,
the hitch pins in the two (2) front deck support pins
are repositioned 2 to 3 notches higher while leaving
the rear pins in their original position.
DANGER
ROTATING BLOWER BLADES
NEVER operate the GHS blower with the
blower discharge chute uncovered (grass
catcher in the dump position) since dan-
gerous projectiles may be thrown. NEVER
put hands into the blower discharge chute
for any reason. Use a stick or similar in-
strument to remove any material if clog-
ging has occurred.
DANGER
NEVER operate the GHS catcher with the
back door open. Objects may be thrown
out the back of the catcher with sufficient
force to cause serious injury to bystand-
ers or property damage. NOTE: For non-
catching operation, the "No-Catch" De-
flector is an available accessory item.
CAUTION
NEVER leave grass clippings in the grass
catcher after mowing. Damp clippings
generate heat as they decompose. This
MAY cause spontaneous combustion.
49
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Operating Instructions
Check the amount of flat section remaining at
blade tip. This is the area that is ground away (re-
moved) when the blades are sharpened. If too much
of the flat section is removed, the “air lift” perfor-
mance or “shovel” effect of the blade deteriorates to
the point that discharge of grass clippings into the
blower chute is marginal. Replace cutter blades if
less than 3/4 in. (19 mm) flat section remains at the
blade tip.
Clogging Checklist
In case of clogging, there will be a distinct change
in the sound of the blower, i.e., the blower sound
will stop. Also, the mower deck will begin to leave a
trail of grass clippings. When this occurs, stop the
engine, disconnect the spark plug wires, and make
sure all movement has stopped before attempt-
ing to unclog.
Check that the interior of the deck housing and
baffling is reasonably clean and free of grass and
dirt buildup. While some degree of material
buildup can be tolerated, a point is finally reached
where the flow of air and grass clippings is
restricted.
DANGER
NEVER place hands under the mower
deck or in the GHS blower discharge
chute. Use a stick or similar tool to re-
move any clogged material.
NOTE: One condition that quickly causes a
buildup of material in the deck housing is mowing
grass and/or weeds which are “juicy.” The material
collects under the deck with sticky, green juice. Clo-
ver and weeds are especially a problem. The mow-
er deck will need to be cleaned frequently when op-
erating in these conditions.
Normally, any clogging will first develop at the back
of the mower deck in the discharge opening into the
blower chute. Clogging at this point does not indi-
cate a particular problem in this part of the
system, but is a symptom of something restrict-
ing the flow of material throughout the entire
system. The following list of items should be
checked if a pattern of clogging begins to develop.
All of these items are capable of causing clogging at
the back of the deck.
Check the deck cutting height setting. When
working in thick, tall grass, lower deck settings
[1 to 2 in. (25 to 51 mm) cutting heights] tend to
restrict airflow from moving into and under the
deck. Raising the deck cutting height will signifi-
cantly increase airflow and reduce clogging when
working in thick, tall grass.
Check to see if the RH and LH mower blades are
installed for the correct rotation - install blades so
the cutting edges move toward each other.
Check the interior of the chute connecting the
mower deck to the blower for smoothness and
freedom from obstruction.
Blades Must Operate at
Right Angles (90 Degrees)
FORWARD
Check the blower wheel for bent blades and
excessive clearance between the blade tip and the
blower housing. A clearance greater than 1/8 in.
(3 mm) will cause a significant loss of blower
performance.
Check the blower discharge chute into the grass
catcher for smoothness and freedom from ob-
struction.
Mounting Nut
Torque = 60 ft-lb
Check the elbow inside the grass catcher for a
buildup of material in the radius of the elbow. In
certain conditions (damp/dirty grass) a considera-
ble “clump” of material can accumulate at this point,
greatly restricting material and airflow.
Rear Discharge
(81.3 N·m)
Chute
Blade Rotation for GHS Mower Deck
(View from Underneath)
50
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Operating Instructions
Check that the openings in the removable air
exhaust screen in the grass catcher are not
plugged. If the screen is clogged, refer to Cleaning
the GHS Exhaust Screen in this section.
WARNING
®
DO NOT test the Grass-Pak switch with
the engine running. Projectiles may be
thrown out of the grass delivery spout,
and COULD cause serious injury.
NOTE: An optional exhaust screen with larger
holes (3/4") is available for use when mowing in wet
grass; the screen provides less airflow restriction
and more clog resistance (use standard screen in
dry conditions to avoid excessive material blowing
out of the catcher).
The “full” signal horn is designed to operate (sound)
when the grass catcher is almost full. The timing of
the signal is adjustable by changing the position of
®
Remember, anything that restricts airflow or material
flow along the entire path from the mower deck to
the grass catcher can cause clogging.
the vane on the Grass-Pak switch. If the signal is
coming on too soon (catcher not completely full) or
too late (grass clogging in catcher spout and deliv-
ery chute), refer to ADJUSTMENTS for GHS Signal
Horn Adjustment in Maintenance Instructions.
Using the Tilt-Up Deck
Refer to CLEANING of Grass Buildup in Mower
Housing in Maintenance Instructions.
NOTE: The horn signal should be adjusted to
sound BEFORE the catcher is completely full to
give the operator time to react and stop mowing. An
indication the horn signal is coming on too late (de-
layed too much) is if grass clippings are falling out of
the grass catcher delivery chute when the catcher is
dumped.
Using the GHS Catcher
®
Powerfil
The GHS catcher has an oscillating grass delivery
®
spout (POWERFIL ) which is designed to spread
Cleaning the GHS Exhaust Screen
grass clippings throughout the interior of the grass
catcher (even when mowing wet, heavy grass). The
oscillating action may be checked by turning the
ignition switch to the ON position and moving the
blade clutch to the ENGAGED position. The spout
should oscillate approximately 25 cycles per
minute.
To remove the grass catcher screen for cleaning,
open the catcher door, push forward and pull down
on the grass catcher screen knobs (on either side of
the screen), and slide the screen out. Use a high
pressure washer or water spray and brush to clean
the screen.
Keeping the catcher exhaust screen clean and open
is essential to good performance of the catching
system. In some mowing conditions, e.g., wet and
dirty, it will be necessary to clean the screen fre-
quently to avoid clogging the mower deck, blower,
and chutes due to airflow restriction.
NOTE: If the grass spout fails to oscillate, the
clutch switch should be checked for function (the
switch closure is adjustable).
“Full” Signal Horn
The GHS catcher has a “full” signal horn to alert
the operator to dump the catcher when it is full (to
prevent overfilling and clogging). The “full” signal
®
horn is activated by a vane switch (Grass-Pak
Grass Catcher
Screen
switch) mounted on the grass delivery spout. Oscil-
lating action of the spout triggers the vane switch as
grass begins to fill in around the spout when the
catcher is almost full.
The “full” signal function may be checked by turning
the ignition switch ON, engaging the blade clutch
(engine not running), opening the catcher back door,
Removal
Knobs
®
and triggering the Grass-Pak vane by hand as it
(Not Visible)
oscillates. The horn should sound as the switch is
moved in both directions.
Grass Catcher Screen Removal for Cleaning
51
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Operating Instructions
4. Close the door by holding the door handle.
The door will close smoothly with the assis-
tance of the gas springs. If the dampening
springs are not functioning properly, they
should be replaced to prevent the door from
slamming closed and possibly causing a pinch
point. (When using the optional 7.0 bushel
catcher, close the door by holding the door
handle with the left hand and releasing the
safety latch on the door hinge mechanism
with the right hand. The safety latch is re-
leased by pressing in on the top of the latch.)
Dumping the Catcher
DANGER
Do not mow or dump grass within 5 feet
(1.5 meters) of an embankment or retain-
ing wall with drop off.
For dumping, the catcher either tailgate dumps into
a disposal area or dumps into the optional dump
bag. The dump bag is a reusable nylon fabric bag
designed to conveniently move grass clippings from
the catcher to a remote disposal area or container.
Using the Dump Bag
1. Open the back door by lifting on the door handle.
CAUTION
NOTE: When using the optional 7.0 bushel
catcher, a safety latch locks the door open
in the fully opened position while the catcher
is being dumped to prevent accidental door
closure.
Use leg muscles and firm footing when lift-
ing the catcher to dump; avoid bending at
the waist and using back muscles to avoid
back injury.
2. Orient the dump bag with one (or two) of the
handle straps on the bag opening facing up.
Tailgate Dumping
1. Open the back door by lifting on the door handle.
Tailgate
Door
Handle
NOTE: When using the optional 7.0 bushel
catcher, a safety latch locks the door open
in the fully opened position while the catcher
is being dumped to prevent accidental door
closure.
2. Tilt the catcher back to dump by lifting on the
catcher lift handle on the lower front corner of
the catcher.
Hook Bag
on Bumper
3. Lower the catcher smoothly down to the normal
operating position. DO NOT allow the catcher
to drop down - the gas spring, that holds the
catcher in the raised position, is not a shock
absorber for lowering the catcher.
Positioning Dump Bag on Catcher
52
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Operating Instructions
3. Hook the bottom of the bag over the rear
bumper while lifting on the handle strap(s).
6. Close the door by holding the door handle.
The door will close smoothly with the assis-
tance of the gas springs. If the dampening
springs are not functioning properly, they
should be replaced to prevent the door from
slamming closed and possibly causing a pinch
point. (When using the optional 7.0 bushel
catcher, close the door by holding the door
handle with the left hand and releasing the
safety latch on the door hinge mechanism
with the right hand. The safety latch is re-
leased by pressing in on the top of the latch.)
4. Tilt the catcher back to dump into the bag by
lifting on the catcher lift handle on the lower
front corner of the catcher with the one hand
while continuing to hold up on the bag
strap(s) with the other hand. Refer to photos
for positioning the bag and dumping.
Power Dump Option
When equipped with the optional power dump sys-
tem, the operator dumps the catcher while sitting in
the seat. A toggle switch operating a power ram is
used to raise and lower the catcher. The back door
automatically opens and closes during the dump
cycle.
Hold the toggle switch UP or DOWN to RAISE or
LOWER the catcher. When the catcher reaches the
full raised or lowered position, the power ram clutch
will make a ratcheting sound. Release the toggle
switch as soon as this sound is heard. DO NOT op-
erate the ram with the clutch ratcheting for an
extended time as this will cause extra wear on the
clutch mechanism.
Catcher Lift/
Dump Handle
CAUTION
The operator should be in the seat and
bystanders stay clear when the power
dump is operating. The power dump is
used ONLY for tailgate dumping. Do not
attempt to use the optional dump bag or
any other bag with the power dump.
Dumping Catcher into Dump Bag
5. Lower the catcher smoothly down to the normal
operating position. DO NOT allow the catcher
to drop down - the gas spring, that holds the
catcher in the raised position, is not a shock
absorber for lowering the catcher.
NOTE: If grass tends to hang up in the catcher af-
ter raising the catcher with the power dump, “jiggle”
the steering levers and make the tractor bounce a lit-
tle to unstick the grass and make it slide out of the
catcher.
NOTE: With the power dump mechanism in the
normal operating position (catcher down), the
catcher can be manually raised for access to the
engine and the catcher can be manually dumped.
53
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Operating Instructions
®
Hi-Dump Option
CAUTION
®
When equipped with the optional Hi-Dump system,
the operator raises and dumps the catcher while sit-
ting in the seat. Two toggle switches operate
independent hydraulic cylinders to raise and lower
the catcher. The back door automatically opens and
closes during the dump cycle.
The operator should be in the seat with
the machine in the NEUTRAL-PARK Posi-
tion and the parking brake engaged and
bystanders stay clear when the Hi-Dump
is operating. Do not attempt to use the
optional dump bag or any other bag with
®
®
NOTE: The ignition switch must be in the ON posi-
tion for the Hi-Dump system to operate.
the Hi-Dump .
®
NOTE: If grass tends to hang up in the catcher af-
®
ter raising the catcher with the Hi-Dump , “jiggle”
the steering levers and make the tractor bounce a lit-
tle to unstick the grass and make it slide out of the
catcher.
Toggle Switch
Toggle Switch
(Dump)
(Lift)
®
NOTE: With the Hi-Dump mechanism in the nor-
mal operating position (catcher down), the catcher
cannot be manually raised. In the case of a dead
battery, use the auxiliary power terminals to charge/
(+) Auxiliary
Power Terminal
®
jump the battery to operate the Hi-Dump .
(-) Auxiliary
Power Terminal
Lift/Dump Control Switches and
Auxiliary Power Terminals
Hold the Lift toggle switch UP or DOWN to RAISE or
LOWER the catcher.
54
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Operating Instructions
Catcher
Door
Upper
Arm
Catcher Door
Gas Spring
Grass Catcher
Cable
Guide
Lift Channel
Power Dump
Ram Actuator
Lower
Arm
Fork
Door Arm
Actuator
Cable Assembly
Gas
Spring
Actuator Mount
Assembly
Dog Leg
Assembly
Rubber
Bumper
Power Dump Components
55
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Operating Instructions
Catcher Door
Catcher Door
Upper
Arm
Grass Catcher
Gas Spring
Cable
Guide
Lift Channel
Gas Spring
Assembly
Lower
Arm
Door Arm
Actuator
Cable Assembly
Catcher
Pivot Arm
Dump
Control
Lift Rod
Cylinder
Control
Lift Rod
Hydraulic
Valves
Hydraulic
Valve Box
Reservoir/Power
Unit
Safety
Lockout Arm
Dump Toggle
Switch
Junction
Blocks
(not visible)
Lift
Cylinder
Lift Toggle
Switch
Coil with
Connectors
®
Hi-Dump Components
56
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CAUTION
Maintenance Instructions
Maintenance procedures requiring special training or
tools should be performed by a trained technician.
MAINTENANCE SCHEDULE CHART - RECOMMENDED SERVICE INTERVALS - MODEL MT, MTL, MTEFI, MTLEFI
25
100
200
Every
Ref.
Service Item
Daily
Hours Hours Hours Yearly 2Years Page
Check Engine Crankcase Oil Level
Check/Clean Engine Air Cooling System*
Check Coolant Level, Radiator/Overflow Tank (MTL)
Clean Radiator Screen and Cooling Fins* (MTL)
Check Security of Air Filtration Components
Check Air Filter Restriction Gauge
Clean Grass Buildup Under Deck
Clean GHS Exhaust Screen*
x
x
x
x
x
x
x
x
x
x
59
68
72
69
72
67
70
51
71
74
Clean GHS Blower*
Service Mower Blades
Check Functions of Instrument Panel and
Warning Horn
x
27
Lubricate Grease Fittings and Oil Points*
x
x
x
x
x
63
62
73
63
74
Check PTO Gearbox Oil Level**
Check Battery Electrolyte Level
Check Hydrostatic Transmission Fluid
Check Tire Pressure
Check Drive Belts (Jackshaft, Engine PTO,
GHS Blower, Ground Drive)
x
75
Check Gearbox Oil Seals
Check Safety Switch System
Check Turbine Precleaner*
Check Blade Brake Action
Check Air Filter Element***
Check Oil Level in Gear Axle
Clean Hydrostatic Transmission Cooling Fins
Clean Engine Cooling Fins (MT, MTEFI)
Change Engine Crankcase Oil (MT, MTEFI)
Check Wheel Bolt Torque (75 to 85 ft-lbs)
Change Engine Oil Filter (MT, MTEFI)
Change Engine Crankcase Oil (MTL)
Change Engine Oil Filter (MTL)
Check Radiator Hoses and Clamps (MTL)
Check/Regap Spark Plugs
x
x
75
76
66
76
67
62
71
69
60
74
60
60
60
76
75
x
x
x
x
x
x
x
x
x
x
x
x
x
Replace Air Filter Element, Safety Filter,
Vacuator™ Valve***
x
67
Replace Fuel Filter
Flush Radiator and Change Coolant (MTL)
Service Battery
x
x
x
x
x
x
x
82
70
73
76
76
75
62
76
75
Check FSC Friction Lock
Service Solenoid Shift Starter
Check PTO U-Joints for Wear/Looseness
Check Fuel Lines andClamps
Change Gear Axle Oil
x
x
x
x
x
Change Hydrostatic Transmission Fluid
Replace Radiator Hoses and Clamps (MTL)
Replace Fuel Lines and Clamps
Replace Ignition Wires
75
More often in extremely dusty or dirty conditions (refer to notes about air cleaner element in
IMPORTANT TIPS FOR CARE OF KOHLER ENGINE)
Change PTO gearbox oil after first 100 hours of operation (break-in period)
Air cleaner is remote mounted Donaldson Radialseal™ unit, replace filter every year
Change engine oil and filter after first 5 hours of operation of a new engine (break-in period)
Change every 2 years or 1000 hours
See your Walker dealer for this service or refer to the Walker Service Manual
Hydrostatic transmissions are sealed - DO NOT OPEN RESERVOIR CAPS - refer to Hydrostatic
Transmission Fluid
57
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Maintenance Instructions
KOHLER TIPS
IMPORTANT TIPS FOR CARE OF THE KOHLER
ENGINE
Operate the engine at full speed when mowing.
This allows the engine to produce full horsepower
and move more cooling air through the engine cool-
ing fins.
Fuel System
Fuel must be clean - free from water, dirt, and or-
Cooling System - MTL
ganic material.
Fill the cooling system with a pre-mixed solution
of 50/50 antifreeze (ethylene glycol) and distilled
water.
Change fuel filter on a regular basis and when
contamination is suspected or found in the fuel.
On the Model MTEFI, the fuel system is pressur-
ized. Do not attempt to service this fuel system. Con-
tact your Walker dealer or authorized Kohler service
dealer for work on the fuel system.
IMPORTANT: Solution must be pre-mixed before
putting it in the engine (adding pure antifreeze into
the radiator may cause damage to the engine by
causing overheating).
Starting/Stopping
Maintain proper fluid levels in the radiator and
overflow tank.
For starting in cold weather [below 40° F (4° C)],
use the optional cold start lever to release the hydro-
static transmissions from the starter cranking load.
Operate the engine at full speed when mowing.
This will allow the engine to produce full horsepower
and move more cooling air through the radiator.
Start engine with the throttle advanced off idle
(1/4 to 1/2 throttle). This will aid starting, especially
in cold weather.
Air Cleaner System
Use only Donaldson air cleaner elements. After-
market elements may not seal in the air cleaner
housing, allowing dirt to enter the engine. Also, af-
termarket filters often skimp on the filtration media
and require more frequent replacement (see follow-
ing instructions).
Keep the battery fully charged.
Match crankcase oil viscosity to the ambient tem-
perature, allowing the engine to crank faster and
start easier.
Use the air flow restriction gauge to indicate the
Use fast idle for stopping engine to avoid run-on
need to service the air filter.
or backfiring.
Cooling System - MT, MTEFI
Do frequently check the Turbine Precleaner for
free movement of the internal fan.
Keep engine air intake screen and cylinder head
fins free of grass clippings, chaff, and dirt. Inspect
intake screen and cooling fins for cleanliness and no
damage.
DO NOT overservice or frequently “disturb” the
air filter. A dirty air filter actually cleans better than
a new one. Changing the air filter too often can ac-
tually reduce filter efficiency and increase the oppor-
tunity for traces of dust to enter the engine. Wait
until the element really needs servicing as indicated
by the air flow restriction gauge.
Periodically remove two access panels in the en-
gine shroud to inspect and clean cylinder head cool-
ing fins.
Check performance of the cooling system by
starting the engine, holding a hand adjacent to the
cylinder head, and feeling the cooling airflow.
When the air filter element is removed or re-
placed, make sure all dust is cleaned out of the air
cleaner housing and hose. Use a damp cloth and
wipe the interior of the canister and hose clean (a lit-
tle dirt left here will be sucked into the engine and
reduce engine life). When the filter is reinstalled,
make sure the element is held tight and straight in
the canister for proper seating and sealing.
DANGER
Make sure to keep hands clear of exhaust
pipe, muffler, and moving parts when
checking airflow.
Periodically check the air intake hose for cuts,
nicks, etc., and the hose clamps for tightness.
58
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Maintenance Instructions
KOHLER TIPS/LUBRICATION
Oil
IMPORTANT: NEVER check or add oil with the
engine running.
Use only multi-viscosity oils as specified with the
viscosity matching ambient temperatures for the en-
gine operating conditions. This will aid starting in
cold weather and assure proper lubrication in hot
weather.
2. Before removing the dipstick, clean the area
around the dipstick to keep any dirt or debris out
of the engine.
3. Remove the dipstick, wipe off with a clean rag,
then reinsert the dipstick into the tube and press
all the way down.
Use only Kohler oil filters. Aftermarket filters
may not seal properly and/or have the incorrect
pressure relief valve for proper lubrication.
4. Remove the dipstick again and check the oil lev-
el on the dipstick. The oil level should be within
the “Operating Range” on the dipstick (between
the “L” mark and the “F” mark).
LUBRICATION
WARNING
IMPORTANT: DO NOT operate engine without
a sufficient oil supply in the crankcase. DO NOT
operate with the oil level below the “L” mark or
above the “F” mark on the dipstick.
DO NOT attempt to lubricate the machine
with the engine running. Disengage the
PTO clutch, shut off the machine, and re-
move the ignition key.
5. If additional oil is needed, refer to Specifications
for proper crankcase lubricant. Fill up to, but
not above, the “F” mark on the dipstick.
Proper lubrication is an important maintenance pro-
cedure. It reduces wear and makes the machine
quieter and easier to operate.
IMPORTANT: DO NOT overfill the crankcase
(oil above “F” mark) as this CAN result in en-
gine overheating, loss of power, and possible
engine damage.
Engine Oil
Engine Break-In Oil
No special break-in oil is required. The engine is
serviced with 10W-30, Service Class SG oil from the
factory. Change the oil after the initial engine break-
in period of 5 hours. Thereafter, change oil after
every 100 hours of operation (200 hour interval for
MTL).
Checking Engine Crankcase Oil Level
Check the engine crankcase oil level before use and
after each 8 hours of continuous operation.
IMPORTANT: The importance of checking and
maintaining the proper crankcase oil level cannot be
overemphasized. Check the oil level BEFORE
EACH USE.
Full Mark
1. Park the mower on a level surface with the en-
gine stopped. Also, make sure the engine is
cool and oil has had time to drain into the sump
[allow at least five (5) minutes after stopping
the engine].
Low Mark
Dipstick Operating Range
59
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Maintenance Instructions
LUBRICATION
Changing Engine Crankcase Oil/Oil Filter
6. Install the new oil filter on the engine. Turn the
filter clockwise until the rubber gasket contacts
the sealing surface, then tighten an additional
1/2 turn.
For Model MT and MTEFI, change the engine crank-
case oil after every 100 hours of operation and re-
place the oil filter every other oil change (every 200
hours of operation).
7. Reinstall the drain plug. Make sure it is tight-
ened to 10 ft-lb (13.6 N·m).
For Model MTL, change the engine crankcase oil af-
ter every 200 hours of operation and replace the oil
filter at the same time.
8. Fill the crankcase through the oil filler tube (dip-
stick opening) with new, clean oil. Use only
crankcase lubricants recommended by the en-
gine manufacturer. Refer to Specifications in
this manual or the engine owner’s manual. Use
the recommended oil viscosity for the expected
ambient temperature. Oil with the correct vis-
cosity will aid startingin cold weather and assure
proper lubrication in hot weather. Fill up to, but
not above, the “F” mark on the dipstick.
Crankcase capacity is 1.85 quarts (1.75 liters)
plus 1/2 pint (0.24 liters) for the new oil filter.
1. Park the mower on a level surface with the en-
gine stopped. The engine oil should be warm
before draining. If not warm from operation,
start the engine and run a few minutes to warm
the oil.
2. Remove the dipstick and the oil drain plug and
drain the oil into a suitable container. Be sure to
allow ample time for complete drainage.
IMPORTANT: Check the dipstick reading be-
fore adding the last 1/2 pint of oil and fill only to
the “F” mark. DO NOT overfill the crankcase
(oil above “F” mark) as this CAN result in en-
gine overheating, loss of power, and possible
engine damage.
Oil Filter
Drain Plug
9. Start the engine and check for oil leaks around
the oil filter. Stop the engine, recheck the oil
level, and add oil if necessary. (When the en-
gine is first operated with a new oil filter, the oil
level drops slightly as the filter is filled with oil.)
Oil Drain/Oil Filter Location
Mower Deck Gearbox Lubrication
3. Before removing the oil filter, clean the area
around the filter to keep dirt and debris out of
the engine.
NOTE: These instructions apply to all mower
decks with gear-driven blades. Refer to DSD52 or
DSD62 Mower Deck Lubrication in this section for
the DSD52 or DSD62 deck with belt-driven blades.
4. Remove the old oil filter and wipe off the filter
mounting surface on the engine.
The mower deck gearboxes (tee gearbox and blade
drivegearboxes)areconnectedasaunitizedassem-
bly, and oil flows freely between them. The gearbox-
es are permanently lubricated (oil filled) and sealed
requiring no scheduled lubrication. However, the
gearbox oil seals should be checked every 25 hours
for indication of an oil leak; particularly the lower
seals on the blade drive gearboxes should be in-
spected, since they operate in a dirty environment. If
an oil leak is noted, replace the oil seal and relubri-
cate the gearbox assembly as follows:
5. Apply a thin coating of clean oil to the rubber
gasket on the replacement oil filter.
IMPORTANT: Use ONLY oil filters from the en-
gine manufacturer (Kohler 12-050-01). After-
market oil filters may not seal properly and/or
may not have the correct pressure relief valve
for proper lubrication.
1. Remove gearbox cover (footrest). Deck orien-
tation should be the normal operating position.
60
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Maintenance Instructions
LUBRICATION
DSD52 or DSD62 Mower Deck Lubrication
Blade Drive
Gearboxes
There are several special lubrication requirements
for the DSD52 or DSD62 mower deck in addition to
the requirements detailed in the Chassis and Deck
Lubrication illustration. Lubricate the locations
shown in the Gearbox, Dolly Wheel, and U-Joint
Lubrication photo and check and maintain oil in the
belt drive gearbox.
1. Check the oil level in the belt drive gearbox ev-
ery 100 hours (or sooner if a visible oil leak has
developed). With the deck in the normal oper-
ating position, remove the level plug in the side
of the gearcase. Add SAE E.P. (Extreme Pres-
sure) 80W-90 (API GL-5) gear lube to maintain
the oil level to the plug. If the oil level is low,
check the gearbox for any indication of an oil
leak. If an oil leak is noted, the gearbox will
need to be removed and rebuilt.
Tee
Gearbox
Mower Deck Gearboxes
(Shown with Gearbox Cover
Removed for Clarity)
2. Clean the area around the individual gearbox
cover plates to prevent contaminants from en-
tering the gearcase.
2. Lubricate the dolly wheel pivot every 25 hours
with general purpose grease.
3. Remove the screws securing the cover plates
on the blade drive gearboxes.
3. Lubricate the U-Joint in the drive shaft every
8 hours with SAE general purpose lithium or
molybdenum base grease.
4. Check the level of lubricant in the gearboxes. If
the lubricant is low, add SAE E.P. (Extreme
Pressure) 80W-90 (API GL-5) gear lube until
the oil level is up to (submerges) the horizontal
shaft in the gearbox (shaft parallel to cover
plate).
Belt Drive
Gearbox
NOTE: In case the gearboxes are completely
drained of oil, approximately 5 fl. oz. (15 cl) of oil
per gearbox is required to refill the gear drive
assembly.
Dolly Wheel
Pivot
NOTE: Since the gearboxes are connected as
a unit by connector tubes, it is necessary to add
oil slowly. Allow a few minutes after adding oil
for the oil to flow throughout the assembly and
the oil level to stabilize before reassembly.
U-Joint
Gearbox, Dolly Wheel, and U-Joint Lubrication
IMPORTANT: DO NOT overfill the deck gear-
boxes. The gearbox assembly is not vented,
and overfilling with oil will cause excessive pres-
sure and result in oil leaks.
5. Check condition of the cover gasket and replace
if worn or damaged. Reinstall gearbox cover
plates; torque screws to 24 in-lb (2.7 N·m).
61
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Maintenance Instructions
LUBRICATION
Tractor PTO Gearbox Lubrication
Changing Gearbox Oil
The tractor PTO gearbox is oil filled. No scheduled
oil change is required. However, changing the oil af-
ter the first 100 hour break-in period will extend
gearbox life and is recommended.
Checking Gearbox Oil Level
Check the gearbox oil level every 25 hours, and if
necessary, add oil [SAE E.P. (Extreme Pressure)
80W-90 (API GL-5) gear lube] to maintain oil level to
the FULL mark on the dipstick.
1. Remove the drain plug in the bottom of the
gearcase, drain the oil, and reinstall the plug.
IMPORTANT: DO NOT overfill the PTO gearbox to
avoid oil leakage out of the dipstick standpipe.
2. Refill the gearbox through the dipstick stand-
pipe using 7 to 8 fl. oz. (21 to 24 cl) of SAE E.P.
(Extreme Pressure) 80W-90 (API GL-5) gear
lube. Remove plug in top of gearcase to vent air
when refilling.
If the oil level is low, check the gearbox for any indi-
cation of an oil leak. If an oil leak is noted, the gear-
box will need to be removed and rebuilt.
3. Check that the oil level is at the FULL mark on
the dipstick. DO NOT overfill.
Gear Axle Lubrication
Jackshaft
Dipstick
The gear axle oil lubrication is SAE E.P. 80W-90
(API GL-5) gear lube.
Check the axle oil level after every 100 hours of
operation by removing the oil level plug. If additional
oil is needed, remove the breather vent on top of ax-
le and fill until oil is at the level plug.
PTO
Gearbox
Change axle oil every 1000 hours or two (2)
years.
Vent Plug
Dipstick Location, Tractor PTO Gearbox
62
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Maintenance Instructions
LUBRICATION
Hydrostatic Transmission Fluid
Grease Fitting and Oil Point Lubrication
Checking Hydrostatic Transmission Fluid Level
Lubricate the grease fittings and oil points after ev-
ery 25 hours of operation. Lubricate more often
when operating in dusty or dirty conditions. Use
SAE general purpose lithium or molybdenum base
grease for grease fittings and light machine oil (SAE
10) to lubricate oil points. Lubricate the locations
shown in the Chassis and Deck Lubrication
Points illustration.
The hydrostatic transmissions are sealed units
and do not need to be opened to check the fluid
level. Hydrostatic fluid level should be checked ev-
ery 25 hours of machine operation. It is preferable
to check the fluid when the fluid is cold. Check
fluid levels as follows:
IMPORTANT: Removing or breaking the seal on
the hydrostatic reservoir cap within the first
1000 hours will VOID THE TRANSMISSION WAR-
RANTY.
NOTE: PTO universal joints (on the deck and trac-
tor) require routine lubrication after every 8 hours of
running time. Remove tractor PTO quick disconnect
tube assembly for easy access to grease fittings.
1. Park the mower on a level surface. Stop the
engine and wipe dirt and contaminants from
around the base of the reservoir to better see
the COLD mark.
NOTE: The best way to lubricate the PTO tube half
of the universal joint assembly is to remove it from
the tractor. See instructions for removing and install-
ing PTO quick coupler, refer to Deck Installation in
Mower Deck Installation on Tractor in the Assem-
bly Instructions.
2. The level of the oil can be seen through the side
of the opaque reservoir (DO NOT REMOVE
RESERVOIR CAP); using a light next to the
reservoir will help make the level more visible.
Reservoir Cap
Cold Level
Air Bleed Plug
Transmission Reservoir and
Air Bleed Plug Location
3. The reservoir has a fluid level COLD mark. The
reservoir oil level should ALWAYS be at or
slightly above the COLD mark.
4. If the fluid is below the COLD mark (or the trans-
mission is not performing properly, contact your
local dealer. Attempting to add fluid or ser-
vice the transmission may VOID THE TRANS-
MISSION WARRANTY.
63
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Maintenance Instructions
LUBRICATION
Ident
No.
Lubrication
Type
No.
Places
Ident
No.
Lubrication
Type
No.
Places
Location
Location
1
2
Deck Caster Wheel Fork Pivot Grease
2
2
25 Brake Actuator Rod and Brake Oil
Band Pivot Pins (Clevis)
3
Deck Caster Wheel Bearing
Grease
26 Brake Actuator Pivot
27 Catcher Hinge Point
28 Rear Wheel Bearings
Grease
Oil
Grease
1
2
2
3
4
Tee Gearbox, Deck
Oil*
Oil*
1
2
Blade Drive Gearbox
5
6
7
8
9
Universal Joint Shaft Assembly Grease**
1
4
2
2
2
1
1
29 Engine Oil
Oil***
Oil
1
2
Pivot Assembly, Tilt-Up Deck
Deck Support Arm Socket
Body Hinge Point
Grease
Grease
Oil
Oil
Grease
Grease
30 Choke Control Cable Ends
(Models MT and MTL only)
31 Belt Tightener Pivot,
Blower Drive (GHS Model Only)
32 Belt Tightener Pivot,
Ground Drive
Grease
Grease
1
1
FSC Actuator Rod Pivot Pins
10 FSC Lever Pivot
11 FSC Lever Fork
(Grease Slide Area)
33 PTO Gearbox Dipstick
Oil***
Oil***
Oil
1
12 (FSC) Friction Body Pivot
13 Steering Lever Pivot
14 Deck Support Arm Pivot
15 Deck-to-PTO Coupling
(Grease Slide Area)
Grease
Grease
Grease
Grease
1
4
2
1
34 Hydrostatic Drive
2
1
35 Choke Control Pivot
(Models MT and MTL only)
36 Throttle Control Pivot
Oil
1
16 Universal Joint Tube Assembly Grease**
17 Universal Joint Quick Connect Grease
Spline (Grease Slide Area)
1
1
*
Gearboxes are permanently lubricated and
sealed requiring no scheduled lubrication.
Oil level should be checked only when an oil
leak is noted. Refer to Mower Deck Gear-
box Lubrication in this section.
18 Parking Brake Lever
Grease
1
2
1
19 Gear Axle
20 Belt Tightener Pivot,
Jackshaft Drive
Oil***
Grease
** Grease every eight (8) hours.
21 Throttle Control Cable Ends
22 Clutch Actuator Push Rod
23 PTO Clutch Lever Pivot
24 Belt Tightener Pivot,
PTO Clutch
Oil
2
2
1
1
Grease
Grease
Grease
*** Refer to Gear Axle Lubrication, Engine
Oil, Tractor PTO Gearbox Lubrication, and
Hydrostatic Transmission Fluid in this sec-
tion.
NOTE: DGHS42 Tilt-Up Deck is shown for reference.
For other Deck Lubrication Points, Refer to
Deck and Carrier Frame Illustrated Parts
Manual.
64
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Maintenance Instructions
LUBRICATION
1
1
2
3
2
4
5
4
6
7
6
7
6
8
6
9
10
12
8
11
13
14
13
14
15
16
17
19
34
21 & 36
30 & 35
34
18
19
33
32
31
20
30
29
21
23
22
22
26
25
24
27
28
27
Chassis and Deck Lubrication Points
65
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Maintenance Instructions
CLEANING
CLEANING
Turbine Precleaner
The turbine precleaner is mounted on a remote air
intake tube connected to the Donaldson air cleaner.
A spinning fan driven by the intake airflow separates
dust from the air, giving the initial stage of air clean-
ing. Dust particles are exhausted through a single
small vent in the side of the housing. Since no dust
is trapped, the precleaner operates without clean-
ing. The only maintenance required is to check the
operation of the internal fan every 100 hours. Verify
operation:
Engine Air Cleaner System
There are two main components in the engine air
cleaner system: a turbine precleaner and a Donald-
son Radialseal™ air cleaner. Each component is
checked, cleaned and maintained on a different
schedule based on the filtering action required.
Each component is serviced as follows:
1. Look into the exhaust vent while shining a light
into the intake.
2. Start the engine and watch the fan begin to spin
as the throttle is advanced.
If the fan is not spinning, service or replace the pre-
cleaner as required.
Turbine
Precleaner
Donaldson Air
Cleaner Cover
Air Restriction
Gauge
Air Cleaner
Cartridge
Precleaner
Tube
Vacuator™
Valve
Safety
Filter
Donaldson Air
Cleaner
Hose
Clamp
Air Intake
Hose
Engine
Engine Air Cleaner System Components
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Maintenance Instructions
CLEANING
Donaldson Radialseal™ Air Cleaner
Push Button to Reset
Indicator After Service
A remote mounted Donaldson Radialseal™ air
cleaner provides the air filtering function. The paper
filter element slides over an outlet tube inside the air
cleaner canister with radial sealing action, reducing
the possibility of dust leaks due to improper filter
installation. Intake design, internal baffling, and a
Vacuator™ valve provide dust separation and auto-
matic precleaning action. Daily or frequent servic-
ing of the air cleaner is not required. Use the air
restriction gauge on the air cleaner outlet to indicate
when the air filter needs servicing -- a red flag will
appear when the filter is overly restricting airflow into
the engine.
Air Restriction
Gauge
Air Restriction Gauge Location
IMPORTANT: Use only Donaldson air filter ele-
ments for replacement (Donaldson P822686 or
Walker 5090-1). Aftermarket filters may not seal
properly or filter efficiently.
Inspect the paper element after every 100 hours of
service and replace the element and safety filter
yearly (or when dirty or damaged). More frequent
replacement may be required when operating in ex-
tremely dusty conditions as indicated by the air re-
striction gauge. Service the air cleaner as follows:
Cover
Canister
1. Release the top and bottom cover latches and
remove the air cleaner cover. Wash the cover
and Vacuator™ valve. Check that these com-
ponents are in good condition. The Vacuator™
valve is subject to wear and deterioration and
should be replaced yearly or when damaged.
The lips of the valve should close and fit togeth-
er; any cracks, deformation, or wear in the valve
is cause for replacement.
Vacuator™
Valve
Radialseal™
Filter Element
2. Remove the filter element by pulling it out of the
canister. There will be some initial resistance as
the filter seal breaks loose and slides off of the
outlet tube. Gently move the end of the filter up
and down and side to side or twist to loosen the
seal. Use gentle action to minimize the amount
of dust dislodged as the filter is removed.
Cover Latch
Air Cleaner Components
(Shown with Cover Being Removed)
IMPORTANT: The Donaldson air cleaner uses a dry
paper-type air filter element. NEVER apply oil to the
paper element.
3. Replace the filter element.
NOTE: Washing the element in water or clean-
ing solution is not recommended. Do not try to
clean the element with compressed air.
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Maintenance Instructions
CLEANING
4. Use a bright light inside the element to inspect
for damage. Check the element very carefully
for pin holes or other damage that will allow
dirt to leak through the paper media. Replace
element if necessary.
10. Install the cover with the word “TOP” properly
oriented to the top of the canister. Give the cov-
er a slight twist as it reaches the canister to
make sure the tab inside the cover goes into a
slot, otherwise the cover will not fit properly.
Make sure both the top and bottom cover latch-
es are securing the cover in place.
5. Without removing, visually inspect the condition
of the safety filter for damage or holes. The
safety filter should only be removed for yearly
replacement (or when dirty or damaged).
Cover Latch
Orient to Top
of Canister
6. Check the condition and resilience of the radial
sealing surface (inside of the open end) of the
filter. Replace the filter if any cracks, tears, or
other damage to the sealing surface are noted.
7. Use a clean, damp cloth and wipe the interior of
the air cleaner canister clean. Use special care
to clean both the inside and outside surfaces
of the outlet tube.
Vacuator™
Valve
Cover Latch
IMPORTANT: Any dust left on the inside of the
outlettubewillgointotheengineandcausewear.
Proper Orientation of Air Cleaner Cover
11. Check the air intake hose for cuts, nicks, cracks,
etc., and the hose clamps for tightness.
8. Check the outside surface of the outlet tube for
smoothness and cleanness (this is the sealing
surface).
12. Reset the air restriction indicator (press button
on the end of indicator).
9. Insert and seat the safety filter and Radialseal™
element carefully into the canister, applying
pressure at the outer rim of the filter; not at the
flexible center. Make sure the filter element is
completely in place before installing the cover.
Engine Cooling System - MT and MTEFI
Air Intake System
IMPORTANT: DO NOT use the cover latches
to force the filter into the canister -- the cover
should fit on with no extra force.
To prevent engine overheating and possible engine
damage, clean grass clippings, chaff, and dirt from
the rotating engine air intake screen after every 8
hours of operation. In certain mowing conditions
(dry grass, leaves, tree “cotton”, etc.), it may be nec-
essary to check and clean the screen several times
each day to prevent engine overheating.
NOTE: DO NOT use petroleum based lubri-
cants on the sealing surfaces of the filter; use tal-
cum powder or dry silicone lubricants if required
for filter installation.
CAUTION
Radialseal™
Canister
Filter Element
Operating the engine with a blocked air
intake screen, dirty or plugged cooling
fins, and/or cooling shrouds removed will
cause engine damage from overheating.
Safety Filter
Outlet Tube
Radial Sealing
Surface
Air Filter Element Replacement
68
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Maintenance Instructions
CLEANING
Cylinder Head Cooling Fins
It is essential for performance and longevity of the
air-cooled engine to keep the cylinder head cooling
fins clean and free of obstruction. After every 8
hours of operation, check the performance of the
cooling system by starting the engine, holding a
hand adjacent to the cylinder head, and feeling the
cooling airflow. If there is little or no airflow, clean the
cooling fins as described below.
Check Airflow
with Hand
Cylinder
Head
DANGER
Make sure to keep hands clear of exhaust
pipe, muffler, and moving parts when
checking airflow.
Cooling System Airflow
Engine Cooling System - MTL and MTLEFI
Radiator Screen and Cooling Fins
Every 100 hours, inspect and clean the cooling fins
(more often when operating in extremely dusty, dirty
conditions). Remove the two (2) cooling fin access
panels in the engine shroud and clean the cooling
fins and external surfaces using compressed air.
Make sure to reinstall the access panels before op-
erating the engine.
To prevent the engine from overheating and possi-
ble engine damage, clean grass clippings, chaff,
and dirt from the fine mesh radiator intake screen
daily. In certain mowing conditions (dry grass,
leaves, tree “cotton”, etc.), it may be necessary to
check and clean the screen several times during use
to prevent engine overheating.
NOTE: If dirt is packed into the cooling fins it may
be necessary to remove the engine shroud in order
to thoroughly clean the cooling fins.
1. Remove the screen. To clean the screen, wash
with soapy water or blow out with compressed
air.
2. Inspect the radiator cooling fins for material
lodged in this area which would restrict cooling
airflow. Use pressurized air or water to clean.
DO NOT use any tool, like a screwdriver or
knife, to clean material out of the fins as this
may damage the cooling fins. DO NOT use cold
water on a hot radiator.
Engine Cooling
Fin Access Panels
Kohler Engine
Shroud
NOTE: Directing pressurized air or water from
the fan side of the radiator outward is recom-
mended to dislodge material packed on the out-
side of the cooling fins. DO NOT use cold water
on a hot radiator.
Engine Air
Intake Screen
Engine Air Intake Screen
and Cooling Fin Access Panels
WARNING
Radiator and engine parts can become ex-
tremely hot during operation. Wear gloves
and avoid touching hot parts while clean-
ing the radiator screen and cleaning de-
bris away from the engine and cooling
system.
69
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Maintenance Instructions
CLEANING
Flushing Radiator and Changing Coolant
Tilt-Up Latch
Change engine coolant every year. Drain the cool-
ant from the engine and radiator:
1. Remove the radiator cap.
Tilt-Up Latch
2. Open the drain cocks on the engine block and
radiator (see the Kohler Owner's Manual for lo-
cation of the drain cocks). Also, drain the cool-
ant recovery tank.
Tilt-Up Hook
on Deck
3. If there is any indication of deposits or scaling
inside the radiator, use a commercial scale re-
mover and flush the cooling system thor-
oughly before adding fresh coolant.
Deck Lock Lever
Deck Secured in TILT-UP Position
Use a pre-mixed 50/50 solution of antifreeze (ethyl-
ene glycol) and distilled water to refill the cooling
system.
DANGER
Do not operate the mower with deck in tilt-
up position. Do not move the tractor with
the deck in the tilt-up position.
IMPORTANT: The solution of antifreeze and water
must be thoroughly pre-mixed before putting it in the
engine. Adding pure antifreeze into the radiator may
cause damage to the engine from overheating.
3. Clean grass buildup underneath the deck using
a pressure washer (and scraper if required).
IMPORTANT: Maintain proper coolant level in the
radiator and coolant recovery tank. The coolant lev-
el should be maintained between FULL and LOW
marks on the coolant recovery tank. Recheck the
coolant level after the first time the engine has been
operated after filling the coolant system (it would be
normal to add a little coolant after initial operation).
NOTE: While some degree of material buildup
in the mower deck housing can be tolerated, a
point is finally reached where cutting quality
deteriorates and clogging begins to occur
because of too much buildup on the baffling and
housing.
Grass Buildup in Mower Housing
4. Lower the deck to the normal operating position
and re-engage the deck lock levers.
DANGER
Before raising or removing the mower
deck for cleaning, stop the engine, re-
move the ignition key, and disconnect the
spark plug wires.
CAUTION
Do not operate machine with deck tilt-up
pivot joint unlocked.
1. Raise the deck lock lever handle on each side
of the carrier frame and pull out to release car-
rier frame for tilting action.
2. Using the carrier frame lift handle, raise deck to
the TILT-UP position and insert the deck hook
into the tilt-up latch on the tractor body.
70
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Maintenance Instructions
CLEANING
GHS Blower
Normally, the GHS blower operates with no mainte-
nance or cleaning. However, when mowing grass
that is dirty and damp (especially springtime mow-
ing), a deposit of dirt may accumulate inside the
blower housing, causing wear and binding of the
blower wheel. When operating in these conditions,
inspect the blower frequently for dirt buildup.
GHS Blower
Drive Belt
Blower
Pulley
Blower
Drive Pulley
NOTE: A visual clue of binding of the blower wheel
is the blower blade tips are polished from rubbing
on dirt.
Depress Idler Pulley
Down to Relax Belt
When a dirt deposit is found, use a high pressure
washer or water spray to clean the inside of the
housing as follows:
Belt Tightener
Idler Pulley
DANGER
Collapse Blower Belt Tightener
to Remove GHS Blower Drive Belt
Before attempting to wash the blower,
stop the engine, remove the ignition key,
and disconnect the spark plug wires.
Wear goggles or face shield.
GHS Exhaust Screen
Refer to Cleaning the GHS Exhaust Screen in Op-
erating Instructions.
1. Remove the GHS blower drive belt tension by
depressing the idler pulley on the tightener arm.
Roll the belt off the blower pulley. The belt
should be clear of the blower pulley, allowing
free movement of the blower wheel.
Hydrostatic Transmission Cooling Fins
Keeping the cooling fins on the hydrostatic transmis-
sions clean and free of obstruction is essential to
avoid overheating the transmission fluid and short-
ening transmission life. The cooling fins should be
checked every100hours;andcleanedifnecessary.
IMPORTANT: With the belt removed, the blow-
er wheel must spin freely. Any binding or drag-
ging of the wheel is an indication of dirt
buildup. This buildup must be cleaned to
avoid abrasive wear of the blower blades, ex-
cessive power loss and eventual loss of blower
performance (clogging).
To clean the fins, use compressed air and/or a pres-
sure washer. The cooling fins extend all the way
around the housing -- the fins underneath need to be
clean as well as the more visible fins above. Also,
pay close attention to the area under the drive pulley.
2. Use a pressure washer or water spray, and di-
rect the spray inside the blower housing against
the blower blades. Water pressure will cause
the blower wheel to begin to spin and the com-
bination of spinning action and water will effec-
tively wash the inside of the housing. Spray
may be directed against the blower blades ver-
tically and horizontally to cause rotation in both
directions for thorough washing action. Wash
blower until the blower wheel spins freely in
both directions.
IMPORTANT: In case an oil leak develops on the
input shaft, the cooling fan blowing dusty air and oil
on the transmission will quickly pack the cooling
fins with oily dirt. If this condition occurs, replace
the seal immediately to avoid overheating and dam-
aging the transmission. The input shaft assembly
and seal are easily replaced without removing the
transmission from the machine.
3. Reinstall the GHS blower drive belt by reversing
the removal procedure.
71
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CLEANING/
CHECKING/SERVICING
Maintenance Instructions
An additional procedure in maintaining transmission
cooling is to inspect the cooling fans. Replace the
fan(s) if blades are missing or damaged.
Recovery Tank
Cooling Fan
Cooling Fins
Model MTL Overflow Tank
Check the coolant level in the coolant recovery tank
and maintain the coolant level between the FULL
and LOW marks on the recovery tank. When the
engine is cold, the coolant level should be at or
slightly above the LOW mark on the recovery tank.
Hydrostatic Transmission Cooling Fins
CHECKING/SERVICING
If the coolant level is low, remove the radiator cap
and fill to the overflow port level and then fill the re-
covery tank above the LOW mark. Use a pre-mixed
50/50 solution of antifreeze (ethylene glycol) and
distilled water to fill the cooling system.
DANGER
To prevent accidental starting of the en-
gine when servicing or adjusting the ma-
chine, remove the key from the ignition
switch and disconnect the spark plug
wires.
IMPORTANT: The coolant solution of antifreeze
and distilled water must be thoroughly pre-mixed be-
fore putting it in the engine (adding pure antifreeze
into the radiator may cause damage to the engine by
causing overheating).
Engine Cooling System - MTL and MTLEFI
Security of Air Filtration Components
Coolant Level
NOTE: The following inspection is only an exter-
nal inspection and should be done without “dis-
turbing” the filtration components.
WARNING
NEVER remove the radiator pressure cap
when the engine is hot — hot water could
spray and cause a burn if the cap is taken
off too soon.
On a daily basis, visually inspect the external condi-
tion of the complete air cleaner system. The follow-
ing items should be inspected:
1. Check the Donaldson Radialseal™ air cleaner
canister for damage. Make sure the cover is in
place and the cover latches are secure - do not
run the engine without the air cleaner cover in
place and secure.
2. Inspect both air intake hoses for cracks, nicks,
cuts, etc., and check the hose clamps for tight-
ness.
3. Check to make sure the air flow indicator is in
place and tight.
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Maintenance Instructions
CHECKING/SERVICING
Battery
IMPORTANT: DO NOT overfill the battery. Electro-
lyte will overflow through the vented caps onto parts
of the machine and WILL result in severe corrosion.
NOTE: For initial battery service during setup, re-
fer to Battery Service in Assembly Instructions.
Cleaning the Terminals
IMPORTANT: Make sure battery is securely mount-
ed in the frame. A loose battery may cause damage
tothecase resultinginacidleakageandseveredam-
age to the machine. A hazard may be created by
damage to critical working parts and safety systems.
If battery terminals are corroded, remove battery
from the mower. Using a wire brush, remove corro-
sion with a solution of one part baking soda and
four parts water. Rinse with clean water. Coat the
terminals with petroleum jelly or terminal protector
spray to retard further corrosion.
CAUTION
Charging the Battery
Important Battery Service, Installation, and
Changing Tips for MTEFI/MTLEFI:
Check the battery charge by measuring the specific
gravity of electrolyte; if specific gravity is less than
1.225, the battery will need to be charged as follows:
Do not allow the battery cables to touch
opposing terminals. When connecting
battery cables attach the positive (+) cable
topositive(+)batteryterminalfirst,followed
by negative (-) cable to negative (-) battery
terminal.
IMPORTANT: On MTEFI and MTLEFI models, al-
ways disconnect the negative (-) battery terminal be-
fore charging. Failure to do so can result in damage
to the ECU.
Never start the engine when the cables
are loose or poorly connected to the
battery terminals.
1. Charge the battery at 15 amps for 10 minutes.
DO NOT exceed 20 amps maximum recom-
mended charging rate. Charge until specific
gravity is at least 1.250. Total charging time
should not exceed one (1) hour.
Never disconnect battery while engine is
running.
Never use a quick battery charger to
2. After charging the battery, use distilled water to
adjust the electrolyte level to the bottom of the
vent wells [1/4 to 1/2 in. (6 to 13 mm) above the
plates].
start the engine.
Never "jump start" the engine using
anothersource. Electricityfluctuations can
damage the ECU (Electronic Control Unit).
DANGER
Always disconnect negative (-) battery
cable lead before charging battery, and
also unplug harness from ECU before per-
forming any welding on equipment.
BATTERIES PRODUCE EXPLOSIVE
GASES
Charge the battery in a well-ventilated
area, so that gases produced while charg-
ing can dissipate.
Electrolyte Level
The battery electrolyte level should be checked af-
ter every 25 hours of operation. To check electro-
lyte level:
Keep sparks, flames, and smoking ma-
terials away from the battery at all times.
1. Remove battery cell filler caps.
Make sure the battery cap vents are open
(check manifold vent on each cap).
2. Check the electrolyte level. If the level is below
the bottom of the vent well, fill with drinking wa-
ter to the bottom of the vent wells [1/4 to 1/2 in.
(6 to 13 mm) above the plates].
Make sure the battery charger is un-
plugged before connecting or discon-
necting cables to the battery.
3. Replace filler caps.
73
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Maintenance Instructions
CHECKING/SERVICING
Tire Pressure
WARNING
Inflate tires to pressures shown below:
DO NOT try to straighten a blade that is
bent. NEVER weld a broken or cracked
blade. ALWAYS replace with a new blade
to assure safety.
Deck Caster Wheel = 20 PSI (137 kPa)
Drive = 15 PSI (103 kPa)
Rear = 20 PSI (137 kPa)
Wheel Bolt Torque
4. If the blade cutting edge is dull or nicked, it
should be sharpened. Remove blades for
sharpening by grasping the end of the blade us-
ing a rag or a thick, padded glove, while loosen-
ing and removing the nut, lock washer, and flat
washer that mounts the blade.
Every 100 hours check the eight (8) lug bolts that
mount the drive tires. They should be torqued to 75
to 85 ft-lbs (101.7 to 115.2 N·m).
Sharpen Mower Blades
Check mower blade(s) for straightness, sharp-
ness, condition of the cutting edge, and balance
every 10 hours of operation (or more often when
mowing abrasive type grass or operating on sandy
soils). Replace blades if worn, bent, cracked, or
otherwise damaged (refer to REPLACING/RE-
PAIRING the MowerBladesinthissection). Usethe
following procedure to check and sharpen blades:
5. Grind cutting edge at the same bevel as the
original. Sharpen only the top of the cutting
edge to maintain sharpness.
NOTE: Blades can be sharpened with an elec-
tric blade sharpener, conventional electric grind-
er, or a hand file.
NOTE: Keep blades sharp - cutting with dull
blades not only yields a poor mowing job but slows
the cutting speed of the mower and causes extra
wear on the engine and blade drive by pulling hard.
CAUTION
ALWAYS wear eye protection and gloves
when sharpening a blade.
1. Stop the engine, remove ignition key, and dis-
connect the spark plug wires before raising the
mower deck to service blades.
Intersection
Wear Area
Sharpen at
Original 30° Angle
2. Raise the deck and secure it in the TILT-UP po-
sition. Refer to CLEANING the Grass Buildup
in Mower Housing in this section for deck rais-
ing instructions.
Wing
Tip
DANGER
30°
NEVER operate cutter blades with the
deck in the raised position.
Do Not Grind or
Sharpen on Underside
NOTE: PTO shaft must be disconnected be-
fore checking blades for straightness.
Mower Blade Profile for Sharpening
3. Check the blades for straightness by marking
the blade tip position inside the deck housing,
and then rotating the opposite end of the blade
to the same position and comparing. If the dif-
ference in blade tip track is more than 1/8 in.
(3 mm), the blade is bent and should be re-
placed.
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Maintenance Instructions
CHECKING/SERVICING
6. Check blade balance by positioning the blade
horizontally on a blade balancer or use a nail
or shaft through the center hole. If either end of
the blade rotates downward, grind (remove)
metal on that end until the blade will
balance. The blade is properly balanced when
neither end drops. Balance of a blade is gener-
ally maintained by removing an equal amount of
material from each end of the blade when
sharpening.
Mower Deck Gearbox Oil Seals
The mower deck gearbox seals should be inspect-
ed every 25 hours for evidence of oil leaking; par-
ticularly the lower oil seal on the blade drive
gearbox. This seal is protected by the trash guard
on the blade hub and seal protector plate on the
housing, but is still vulnerable to seal damage due
to operating in an adverse environment. The mow-
er blade must be removed for inspection of the
seal, so it is recommended to inspect the gearbox
seals when blades are removed for sharpening.
If an oil leak is noted, the seal should be replaced
and the gearbox assembly relubricated. Refer to
LUBRICATION for Mower Deck Gearbox Lubri-
cation in this section.
Spark Plugs
Every 200 hours of operation, remove the spark
plugs, inspect, clean, and reset the gap (or replace
with new plugs). Before removing the spark plugs,
clean the area around the base of the plugs to keep
dirt and debris out of the engine. Clean spark plugs
with a wire brush. DO NOT use an abrasive grit
Blade Balancer
type cleaner. If the electrodes are burned short or
pitted, replace plugs with Champion
type RC12YC
Blade Balanced on Magnetic
Wall-Mounted Balancer
[MT & MTEFI (or equivalent)] or RC14YC [MTL &
MTLEFI (or equivalent)]. Check spark plug gap with
a wire-type feeler gauge and set the gap at 0.030 in.
(0.76 mm). Reinstall and tighten to between 18 and
22 ft-lb (24.4 to 29.8 N·m).
7. Mount the blade with wing tips pointing up into
the housing. Reinstall the blade, washer, lock
washer, and nut. Tighten the nut to 60 ft-lb
(81.3 N·m).
Ignition Wires
NOTE: When reinstalling blades on GHS
models, remember, the blades turn toward
each other (counter-rotate) and the RH and LH
blade cannot be switched. Check for proper
blade rotation before installing blades on the
deck. Refer to Blade Rotation for GHS Mower
Deck illustration shown in Clogging Checklist
in Operating Instructions for correct blade
rotation.
Good preventive maintenance calls for complete re-
placement of spark plug wires every two (2) years.
Fuel Lines and Clamps
NOTE: The MTEFI system is pressurized and
should be serviced by a Walker dealer or Authorized
Kohler engine service outlet.
Every year, inspect the fuel supply line from the tank
to engine for deterioration or damage. Also, inspect
the fuel line clamps for tightness. Good preventive
maintenance calls for complete replacement of fuel
lines and clamps every two (2) years.
Drive Belts
Raise the body and inspect the condition of the
four (4) belts (3 belts on SD models) every 25 hours
of operation - engine PTO drive, jackshaft drive, hy-
drostatic ground drive, and GHS blower drive. If the
belts show signs of cracking or deteriorating, the
belts should be replaced. Refer to REPLACING/
REPAIRING the Drive Belts in this section.
75
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Maintenance Instructions
CHECKING/SERVICING
Radiator Hoses and Clamps - MTL and MTLEFI
NOTE: There is a 1 to 1-1/2 second time delay
function on the seat switch to avoid engine power in-
terruption when driving over bumps.
Inspect the radiator hoses every 200 hours for de-
terioration or damage. Also check the tightness of
the hose clamps. Good preventive maintenance
calls for complete replacement of the radiator hos-
es and clamps every two (2) years.
If any of the following conditions occur during start-
ing or operating, a safety interlock switch may be
malfunctioning. Contact your Walker dealer for trou-
bleshooting and/or replacement.
Blade Brake Action
With an operator in the seat, the engine starts
with the Forward Speed Control (FSC) and/or the
PTO engaged.
WARNING
It is important to check and maintain blade
brake action for safe operation of the ma-
chine.
With an operator in the seat, the engine starts but
dies soon after the Forward Speed Control (FSC) or
PTO is engaged.
Without an operator on the seat, the engine
starts and continues to run with the Forward Speed
Control (FSC) and/or PTO engaged.
Check the function of the cutter blade brake (and
blower brake on GHS models) by engaging the blade
clutch(PTO),operatingtheengineatfullthrottle,then
disengaging the clutch and measuring how quickly
the blades stop. Watch the rotation of the blade drive
shaft and blower pulley as a visual indication that
movement has stopped. If the brake is working
properly, all rotation will stop five (5) seconds af-
ter disengagement of the clutch. If the brake sys-
tem malfunctions - blades do not stop in five (5)
seconds - adjust or repair the brake before operating
the mower. Contact your Walker dealer for this ser-
vice or refer to the Walker Service Manual.
With an operator in the seat, the Forward Speed
Control (FSC) and PTO disengaged and panel horn
works, but the starter is not engaging.
Forward Speed Control Friction Lock
The FSC friction lock is designed to hold the select-
ed forward travel speed when the steering levers
are moved and yet the friction is not too heavy to
make moving the FSC control difficult (too much
friction). The procedure for checking the FSC fric-
tion lock is as follows:
PTO U-Joints
1. Place the FSC in the full FORWARD position
and pull both steering levers back; the FSC le-
ver should not move. If the FSC lever moves
back when the steering levers are pulled back,
the friction needs to be increased.
The PTO U-joints should be inspected yearly for
looseness and wear. If either is noticed, the respec-
tive shaft or tube should be replaced. A worn U-joint
can cause vibration and extensive damage to the
PTO and deck gearboxes.
2. With the steering levers held back, move the
FSC lever back from the FORWARD position.
With a proper amount of friction adjusted, the
FSC lever should move back with a slight
amount of resistance (friction). If the FSC lever
movement is “stiff”, the friction needs to be de-
creased.
Safety Switch System
WARNING
It is important to check and maintain the
safety switch system for safe operation of
the machine.
If the FSC friction lock needs to be adjusted, contact
your Walker dealer or refer to the Walker Service
Manual.
There are three (3) safety interlock switches on the
tractor; Seat Switch, FSC Neutral - Park Switch, and
PTO Switch.
76
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Maintenance Instructions
REPLACING/REPAIRING
REPLACING/REPAIRING
Drive Belts
There are four (4) individual belts on GHS models
or three (3) belts on SD models:
DANGER
Jackshaft Drive Belt
To prevent accidental starting of the en-
gine when replacing parts or repairing the
machine, remove the key from the ignition
switch and disconnect the spark plug
wires.
Engine PTO Drive Belt (3 Groove Power Band)
GHS Blower Drive Belt (GHS Model Only)
Hydrostatic Ground Drive Belt
IMPORTANT: ALWAYS use genuine factory re-
placement parts. Substitute parts CAN result in
product malfunction and possible injury to the oper-
ator and/or others.
The belts may be removed and replaced using the
procedures described on the following pages.
Jackshaft
Drive Belt
Engine PTO
Belt
GHS Blower Belt
(GHS Model Only)
Hydrostatic Ground
Drive Belt
Belt Locations
77
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Maintenance Instructions
REPLACING/REPAIRING
Engine PTO Drive Belt (3 Groove Power Band)
c. Raise the clutch lever (engage position) to
lift the clutch idler away from the belt.
1. To remove the engine PTO drive belt:
d. Next remove the belt from the engine pul-
ley and then the PTO drive pulley.
a. Remove the jackshaft drive belt from its
idler pulley (by pushing down on idler pul-
ley) and let the belt drop down out of the
way.
2. Install the PTO drive belt by reversing the re-
moval procedure.
NOTE: Step (a) is not essential to removing
the PTO belt, but it makes more room to work
with the PTO belt.
IMPORTANT: Make sure the belt is installed
inside the four (4) belt guide pins.
Check and make the following adjustments:
a. Clutch engagement for proper belt tension.
b. Clutch disengagement and brake action.
b. Push the clutch idler pulley down (until the
PTO belt tightener stop block contacts the
frame) and then shift the belt off the idler
pulley (to the inside).
Clutch
Linkage
PTO Belt
Tightener Arm
Pull UP to Engage
PTO Belt Tightener
Stop Block
Engine
PTO Belt
Belt
Guide
Blade Clutch Lever
in the DOWN Position
Engine
Pulley
Belt Guides
(Bottom Guide Not Visible)
Clutch Idler
Pulley
Belt
Guide
Brake Band
Mount Bracket
PTO Drive
Pulley
Micro-V Pulley
(GHS Blower Drive)
Engine PTO Drive Belt Removal
78
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Maintenance Instructions
REPLACING/REPAIRING
Jackshaft Drive Belt
b. Relax the belt by depressing the spring-
loaded idler arm.
1. To remove the jackshaft drive belt:
c. Roll the belt off the jackshaft pulley and
remove.
a. Remove the engine PTO drive belt, as
described in previous section.
Push Idler Pulley Down to Relax Belt
Jackshaft
Idler Pulley
Engine
Pulley
Jackshaft
Drive Belt
Tension Spring
Jackshaft Drive Belt (Disengaged)
2. Reverse the removal procedure to replace the
jackshaft drive belt.
Jackshaft
Idler Arm
Engine
Pulley
Jackshaft
Drive Belt
Tension Spring
Jackshaft Drive Belt (Engaged)
79
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Maintenance Instructions
REPLACING/REPAIRING
GHS Blower Drive Belt
1. Remove the GHS blower drive belt tension by
depressing the idler pulley on the tightener
arm. Roll the belt off the blower pulley and
remove.
Blower Drive
Pulley
GHS Blower
Drive Belt
Blower
Pulley
Depress Idler Pulley
Down to Relax Belt
Belt Tightener
Idler Pulley
(Disengaged)
GHS Blower Drive Belt Assembly (Disengaged)
2. Reverse the procedure to install the GHS blow-
er drive belt.
Belt Tightener
Idler Pulley
(Engaged)
GHS Blower Drive Belt Assembly (Engaged)
80
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Maintenance Instructions
REPLACING/REPAIRING
Hydrostatic Ground Drive Belt
b. Slide belt off pulleys, then release the idler.
1. To remove the hydrostatic ground drive belt:
a. Raise the spring-loaded belt tightener arm
and idler pulley to relax belt.
Belt Tightener Arm
Idler Pulley
Jackshaft
Transmission
Drive Pulley
Spring
Hydrostatic
Ground Drive Belt
Hydrostatic Ground Drive Belt Assembly (Disengaged)
2. Reverse the procedure to install the hydrostatic
ground drive belt.
Belt Tightener Arm
Idler Pulley
Spring
Hydrostatic
Ground Drive Belt
Hydrostatic Ground Drive Belt Assembly (Engaged)
81
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Maintenance Instructions
REPLACING/REPAIRING
Fuel Filter - Model MT and MTL
Fuel Filter - MTEFI and MTLEFI
Models MT and MTL are each equipped with an in-
line fuel filter. Visually inspect the filter periodically,
and replace the filter yearly.
WARNING
The MTEFI fuel system operates under
high pressure. This system should be
serviced by a Walker dealer or authorized
Kohler service dealer.
Model MTEFI is equipped with a high-volume, high-
pressure, 10-15 micron, in-line fuel filter. Replace-
ment of this filter is recommended every 1500
hours of operation or more frequently under ex-
tremely dusty or dirty conditions. Because the
MTEFI has a pressurized fuel system, fuel filter re-
placement should be done by a Walker dealer or au-
thorized Kohler service dealer.
In-Line
Fuel Filter
Fuel Filter Location
IMPORTANT: Replace the fuel filter only in a clean
area where the fuel line and connections will not be
contaminated by any dust and dirt.
DANGER
Gasoline is extremely flammable and can
be highly explosive. To minimize danger:
Use only an approved fuel container for
gasoline.
DO NOT allow open flames or sparks
near the machine while performing main-
tenance or refueling; DO NOT smoke
while working with fuel.
Wipe up spilled gasoline immediately
and completely.
1. Expand and slide clamps on either side of the
filter away from filter and pull fuel lines off filter.
2. Replace filter.
82
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Maintenance Instructions
REPLACING/REPAIRING
Blade Overload Shear Bolts
PTO Shear Pin
The PTO drive shaft connection to the deck gearbox
has a shear pin to provide shock load protection to
the mower deck drive. This system provides prima-
ry shock protection in case of blade impact and will
normally shear before the individual shear bolts on
the blade hub.
NOTE: Shear bolts are not used on the DSD52 or
DSD62 mower deck.
The cutting blade is keyed to the blade hub by two
(2) shear bolts (10-24 x 5/8 in. stainless steel ma-
chine screws). These bolts are designed to shear
and protect the blade drive gearbox from damage if
the blade encounters a shock load.
When the PTO pin has sheared, use the following
procedure to replace it:
1. Loosen the two bolts securing the PTO shaft
guard on the deck; lift the guard off. (Holes in
guard are slotted for easy removal.)
2. Rotate U-joint on shaft to align the shear pin
hole with the hole (and shear pin fragment) in
the shaft. Use a punch to drive the remaining
portion of the old shear pin out.
Cutting Blade
Shear Bolts
3. Install new shear pin and secure with cotter pin.
Split Spring Pin
(Retains U-Joint Held on Shaft
with Broken Shear Pin)
Cutting Blade Shear Bolts
Shear Pin
NOTE: Tightening the 5/8-18 blade mounting nut
to 60 ft-lb (81.3 N·m) is also important for proper
shock load protection. It is important to not over-
tighten the mounting nut since this defeats (over-
rides) the function of the shear bolts.
U-Joint
Tube Assembly
U-Joint
Shaft Assembly
If these bolts shear, remove the blade and install new
bolts. Refer to CHECKING/SERVICING in this sec-
tion for Sharpen Mower Blades which describes the
blade removal and installation procedure.
Cotter Pin
PTO Shear Pin
After reinstalling the blade, check blade timing by
moving blades through one (1) complete revolu-
tion. Make sure blade tips pass clear of each other.
If timing is incorrect, contact your Walker dealer.
IMPORTANT: Use only Walker P/N 8067-13
shear pins for replacement to provide proper
shock protection -- these pins are hardened to
shear under a specific amount of load.
4. Reinstall the PTO shaft guard.
NOTE: Use Walker P/N 8067-10 for heavy duty
gearboxes.
Before operating the deck, inspect the blade over-
load shear bolts and also check blade timing (on
gear driven decks) by moving blades through one
(1) complete revolution. Make sure blade tips
pass clear of each other. If timing is incorrect, con-
tact your Walker dealer.
83
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Maintenance Instructions
REPLACING/REPAIRING
Mower Blades
Check the blades for straightness by marking
blade tip position inside the deck housing and then
rotating the opposite end of the blade to the same
position and comparing. If the difference in blade tip
track is more than 1/8 in. (3 mm), the blade is bent
and should be replaced.
Mower blades are removed and remounted as de-
scribed in Sharpen Mower Blades instructions.
During the course of sharpening and inspecting
mower blades, if there are any of the following
conditions of wear or damage, blades should be
replaced for reasons of safety and performance of
the machine:
Inspect the blade surface, especially in formed
areas, for cracks. Replace the blade if any cracks
are found.
An excessive amount of the flat section of the
blade has been ground away (removed) when the
blade is sharpened. Replace the blade when less
than a 3/4 in. (19 mm) flat section remains at the
blade tip.
WARNING
DO NOT try to straighten a blade that is
bent. NEVER weld a broken or cracked
blade. ALWAYS replace with a new blade
to assure safety.
Examine ends of the blade carefully, especially
the intersection where the flat section of the blade
turns up to form the “wing tip” (refer to Mower Blade
Profile for Sharpening illustration in Sharpen
Mower Blades instructions). Since sand and abra-
sive material can wear metal away in this area, the
blade should be replaced when metal thickness
has worn to 1/16 in. (1.6 mm) or less.
Reinstall the blades following procedure in
CHECKING/SERVICING for Sharpen Mower
Blades instructions. If blades are replaced, always
use Walker original equipment blades to ensure
safety and optimum performance. The quality and
performance of replacement blades offered by
other manufacturers cannot be guaranteed, they
could be dangerous.
DANGER
When blades are operated over sandy
soil, and if blades are allowed to wear, a
“slot” may be worn into the wing tip of
blade. Eventually a piece of the blade may
break off creating a serious potential for
injury or damage.
CAUTION
ALWAYS use genuine factory replacement
parts. Substitute parts CAN result in prod-
uct malfunction and possible injury to the
operator.
84
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Maintenance Instructions
ADJUSTMENTS
ADJUSTMENTS
Steering Levers
Tilt-Up Deck Adjustable Stop
When the carrier frame hinge joint is properly adjust-
ed, the deck lock levers should move in and out of the
engaged and disengaged positions freely. Adjust-
ments are made by loosening the jam nut and tight-
ening or loosening the set screws on the Deck Mount
Pivot Brackets. Retighten the jam nut when the ad-
justment is complete.
An adjustment range of approximately 3 in. (76 mm)
is available on the steering levers - the levers can be
adjusted forward or aft depending on the arm length
of the operator. The levers can be adjusted by loos-
ening the locknut at the pivot point and the locknut
holding the lever in position in the adjustment slide.
Adjust levers into most comfortable position and
tighten both locknuts.
Jam Nut
Adjustment
Set Screw
Slide
Locknut
(Position)
Tilt-Up Deck Adjustable Stop
Locknut
(Pivot Point)
Steering Lever Adjustment
85
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Maintenance Instructions
ADJUSTMENTS
GHS Signal Horn Adjustment
(When Horn Sounds at Wrong Time)
Exhaust
Screen
®
The vertical position of the Grass-Pak switch is crit-
ical to make sure the catcher box does not overfill
causing the delivery chute to clog. The vertical po-
sition can be adjusted by bending the mounting
®
bracket for the Grass-Pak switch.
4 to 4-1/2 in.
(10.16 to 11.43 cm)
1. Position the discharge chute so that it is point-
ing straight back.
a. Turn the ignition switch ON and move the
blade clutch to the ENGAGED position
(engine not running).
b. Open the catcher back door and monitor
the spout position (as it oscillates) and
move the blade clutch to the DISEN-
GAGED position and turn the ignition
switch to the OFF position.
Bend
Point
®
Adjusting the Grass-Pak Switch
(Side View of Catcher Box)
WARNING
®
3. If adjustment is required, hold the Grass-Pak
switch mount bracket firmly, grasp the switch
and bracket and bend it down. Adjustments
should be done in very small increments check-
ing the measurement each time until the recom-
®
DO NOT test the Grass-Pak switch with
the engine running. Projectiles CAN be
thrown out of the grass delivery spout and
CAN cause serious injury to bystanders or
property damage.
mended measurement is achieved.
This
measurement is applicable to all catcher box
sizes.
2. Measure from the exhaust screen (top of catch-
®
NOTE: It will not be possible to adjust the
switch to give a signal at the precise instant the
catcher is full for a wide variety of mowing con-
ditions. For example, wet heavy grass will fill the
catcher differently than dry fluffy grass, causing
the signal to come on a little sooner or later than
usual. Primarily, the switch should be adjusted
to give the “full” signal with a little advance
warning before overfilling and clogging of
the grass delivery chute begins (regardless of
mowing conditions).
er) to the top of the Grass-Pak switch actuator
®
vane, refer to Adjusting the Grass-Pak
Switch illustration. The proper measurement
should be between 4 and 4-1/2 inches (10.16
and 11.43 cm).
86
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LIMITED WARRANTY
FOR
WALKER
COMMERCIAL RIDER MOWER
1.
WHAT THIS WARRANTY COVERS, AND FOR HOW LONG:
Walker Manufacturing company will, at its option, repair or replace, without charge, any part covered by this warranty
which is found to be defective in material and/or workmanship within one (1) year* after date of sale to the original retail
purchaser unless the product is used for rental purposes, in which case this warranty is limited to ninety (90) days. At
Walker's request, customer will make the defective part available for inspection by Walker and/or return the defective part
to Walker, transportation charges prepaid. All parts and components of the Walker Mower are covered by this warranty
except the following components which are warranted separately by their respective manufacturers:
Kohler Engine
Kubota Engine
Kawasaki Engine
Eaton Hydraulic Transmission
Peerless Gearboxes
Battery
Tires
The available warranties covering these items are furnished with each mower. Walker does not assume any warranty obli-
gation, liability or modification for these items, which are covered exclusively by the stated warranty of the respective man-
ufacturers noted above.
* An extended three (3) year warranty is offered on the Walker P/N 6200-9 Gear Axle Assembly.
2.
WHAT THIS WARRANTY DOES NOT COVER:
A. This warranty does not cover defects caused by depreciation or damage caused by normal wear, accidents, improper
maintenance, improper use or abuse of the product, alterations, or failure to follow the instructions contained in the
Owner’s Manual for operation and maintenance.
B. The customer shall pay any charges for making service calls and/or for transporting the mower to and from the place
where the inspection and/or warranty work is performed.
3.
4.
HOW TO OBTAIN SERVICE UNDER THIS WARRANTY:
Warranty service can be arranged by contacting the dealer where you purchased the mower or by contacting Walker Man-
ufacturing Company, 5925 East Harmony Road, Ft. Collins, CO 80528. Proof of the date of purchase may be required to
verify warranty coverage.
WARRANTY LIMITATION:
A. THERE IS NO OTHER EXPRESS WARRANTY. ANY WARRANTY THAT MAY BE IMPLIED FROM THIS
PURCHASE INCLUDING MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE IS HEREBY
LIMITED TO THE DURATION OF THIS WARRANTY AND TO THE EXTENT PERMITTED BY LAW ANY AND ALL
IMPLIED WARRANTIES ARE EXCLUDED. Some states do not allow limitations on how long an implied warranty
lasts, so the above limitations may not apply to you.
B. WALKER WILL NOT BE LIABLE FOR ANY INCIDENTAL, CONSEQUENTIAL, OR SPECIAL DAMAGES AND/OR
EXPENSES IN CONNECTION WITH THE PURCHASE OR USE OF THE MOWER. Some states do not allow the
exclusion or limitation of incidental or consequential damages, so the above limitation(s) or exclusion(s) may not
apply to you.
C. Only the warranty expressed in this limited warranty shall apply and no dealer, distributor, or individual is authorized
to amend, modify, or extend this warranty in any way. Accordingly, additional statements such as dealer advertising
or presentations, whether oral or written, do not constitute warranties by Walker, and should not be relied upon.
D. This warranty gives you specific legal rights, and you may also have other rights which vary from state to state.
87
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Sound - Model MT
Sound - Model MTEFI
Sound Test
Sound Test
Sound test conducted was in accordance
with Council Directive 2000/14/EEC and
was performed on 28 February 06 under the
conditions listed:
Sound test conducted was in accordance
with Council Directive 2000/14/EEC and
was performed on 28 February 06 under the
conditions listed:
Lwa
100
Lwa
100
General Condition:
Temperature:
Wind Speed:
Humidity:
Clear
General Condition:
Temperature:
Wind Speed:
Humidity:
Clear
o
o
LpA
LpA
18 (C), (65 F)
18 (C), (65 F)
85
85
< 2 m/s
20%
< 2 m/s
20%
OPERATOR
OPERATOR
Barometric Pressure: 83.8 kPA
Barometric Pressure: 83.8 kPA
Sound - Model MTL
Sound - Model MTLEFI
Sound Test
Sound Test
Sound test conducted was in accordance
with 79/113/EEC and was performed on 26
June 02 under the conditions listed:
Sound test conducted was in accordance
with Council Directive 2000/14/EEC and
was performed on 28 February 06 under the
conditions listed:
Lwa
101
Lwa
100
General Condition:
Temperature:
Wind Speed:
Humidity:
Clear
General Condition:
Temperature:
Wind Speed:
Humidity:
Clear
LpA
o
o
50 (F) 10 (C)
o
LpA
90
18 (C), (65 F)
< 5 mph (< 8 kmh)
52%
85
< 2 m/s
20%
OPERATOR
OPERATOR
B a r o m e t r i c P r e s s u r e : 2 4 . 9 " H G ( 7 5 9 m m H g )
Barometric Pressure: 83.8 kPA
Vibration - Model MTEFI
Vibration - Model MT
Vibration Level
Vibration Level
Vibration levels at the operators handles
were measured in the vertical, lateral, and
longitudinal directions using calibrated vibra-
Vibration levels at the operators handles
were measured in the vertical, lateral, and
longitudinal directions using calibrated vibra-
tion test equipment.
0.8g
0.8g
tion test equipment.
Vibration - Model MTLEFI
Vibration - Model MTL
Vibration Level
Vibration Level
Vibration levels at the operators handles
were measured in the vertical, lateral, and
longitudinal directions using calibrated vibra-
Vibration levels at the operators handles
were measured in the vertical, lateral, and
longitudinal directions using calibrated vibra-
0.4g
0.8g
tion test equipment.
tion test equipment.
TM
WALKER MFG. CO. 5925 E. HARMONY ROAD, FORT COLLINS, CO 80528 (970) 221-5614
FORM NO. 080909
PRINTED IN USA
©2009 WALKER MFG. CO
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