OPERATOR’S
MANUAL
Turf Tiger
Models: STT52V-27CH
STT61V-27CH
STT61V-27KA
STT61V-29DFI-SS
STT61V-35BVAC-SS
STT-29DFI-SS
STT-35BVAC-SS
C ongra tula tions on owning a Sc a g mower! This ma nua l c onta ins the opera ting
instruc tions a nd sa fety informa tion for your Sc a g mower. Rea ding this ma nua l
c a n provide you with a ssista nc e in ma intena nc e a nd a djustment proc edures to
keep your mower performing to maximum efficiency. The specific models that
this book c overs a re listed on the inside c over. Before opera ting your ma c hine,
plea se rea d a ll the informa tion enc losed.
© 2008
PART NO. 03248 Rev.2
PRINTED 9/2008
PRINTED IN USA
Sc a g Power Equipment
Division of Meta lc ra ft of Ma yville, Inc .
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Table of Contents
Table of Contents
SECTION 1 - GENERAL INFORMATION...................................................................................1
1.2 DIRECTION REFERENCE...........................................................................................................................1
SECTION 2 - SAFETY INFORMATION......................................................................................3
2.2 SIGNAL WORDS..........................................................................................................................................3
2.5 ROLL-OvER PROTECTION SYSTEM.........................................................................................................6
2.7 USING A SPARK ARRESTOR.....................................................................................................................8
2.8 SAFETY AND INSTRUCTIONAL DECALS.................................................................................................9
3.6 WEIGHTS AND DIMENSIONS...................................................................................................................12
SECTION 4 - OPERATING INSTRUCTIONS ...........................................................................13
4.1 CONTROLS AND INSTRUMENT IDENTIFICATION ................................................................................13
4.2 SAFETY INTERLOCK SYSTEM................................................................................................................14
4.6 ENGAGING THE DECK DRIvE (CUTTER BLADES)................................................................................16
4.8 PARKING THE MOWER.............................................................................................................................17
4.9 AFTER OPERATION..................................................................................................................................17
4.11 MOvING MOWER WITH ENGINE STOPPED..........................................................................................18
4.12 RECOMMENDATIONS FOR MOWING....................................................................................................18
I
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Table of Contents
6.1 PARKING BRAKE ADJUSTMENT ............................................................................................................24
6.3 THROTTLE CONTROL AND CHOKE ADJUSTMENTS............................................................................26
7.5 ENGINE FUEL SYSTEM............................................................................................................................36
SECTION 8 - ILLUSTRATED PARTS LIST ..............................................................................43
52v CUTTER DECK.........................................................................................................................................44
61v & 72vS CUTTER DECKS.........................................................................................................................46
DECK DRIvE COMPONENTS.........................................................................................................................58
ENGINE AND ATTACHING PARTS - KOHLER...............................................................................................60
ENGINE & ATTACHING PARTS - 27HP, 29DFI KAWASAKI & 35BvAC ........................................................62
FUEL AND HYDRAULIC SYSTEM..................................................................................................................66
BDP-16A HYDRAULIC PUMP ASSEMBLY.....................................................................................................70
BDP-16A HYDRAULIC PUMP ASSEMBLY WITH COOLING FAN(29DFI & 35BvAC)) .................................72
II
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Table of Contents
ELECTRICAL SYSTEM - 27HP KAWASAKI...................................................................................................76
STT ELECTRICAL SCHEMATIC (KOHLER)...................................................................................................82
ELECTRICAL SCHEMATIC - 29DFI KAWASAKI............................................................................................84
III
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Section 1
GENERAL INFORMATION
USE ONLY SCAG APPROvED ATTACHMENTS AND
ACCESSORIES.
1.1 INTRODUCTION
Your mower was built to the highest standards in the
industry. However, the prolonged life and maximum
efficiency of your mower depends on you following the
operating, maintenance and adjustment instructions in
this manual.
Attachments and accessories manufactured by companies
other than Scag Power Equipment are not approved for
use on this machine. See Section 8-1.
WARNING
If additional information or service is needed, contact your
Scag Power Equipment Dealer.
For pictorial clarity, some illustrations and figures
in this manual may show shields, guards or plates
open or removed.Under no circumstances should
your mower be operated without these devices
in place.
We encourage you to contact your dealer for repairs.
All Scag dealers are informed of the latest methods to
service this equipment and provide prompt and efficient
service in the field or at their service shop. They carry a
full line of Scag service parts.
All information is based upon product information available
at the time of approval for printing. Scag Power Equipment
reserves the right to make changes at any time without
notice and without incurring any obligation.
- IMPORTANT -
The replacement of any part on this product
by other than the manufacturer's authorized
replacement part may adversely affect the
performance, durability or safety of this
product.
1.2 DIRECTION REFERENCE
Use of other than original Scag replacement
parts will void the warranty.
The “Right” and “Left”, “Front” and “Rear” of the machine
are referenced from the operator’s right and left when
seated in the normal operating position and facing the
forward travel direction.
When ordering parts, always give the model and serial
number of your mower. The serial number plate is located
between the seat and the controls where shown in Figure
1-1.
1.3 SERvICING THE ENGINE AND DRIvE
TRAIN COMPONENTS
SERIAL NUMBER
PLATE LOCATION
The detail servicing and repair of the engine, hydraulic
pumps and gearboxes are not covered in this manual;
only routine maintenance and general service instructions
are provided. For service of these components during the
limited warranty period, it is important to contact your
Scag dealer or find a local authorized servicing agent
of the component manufacturer. Any unauthorized work
done on these components during the warranty period
may void your warranty.
5,832,708
5,865,018
4,991,382
4,998,948
5,118,617
5,826,416
OF THE FOLLOWING PATENTS:
MANUFA4,
48 ,006ED UNDER ONE OR MORE
4,885,903
4,920,733
4,967,543
R
C
TUR
7
PATENTS PENDING
MODEL
SERIA
Mayville, Wisconsin 53050
Division oPfaMe
L
tenttaslcIsrasfute
o a
df MandyvPilelen,dIinncg.
Figure 1-1. Mower Serial Number Plate Location
1
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Section 1
1.4 SYMBOLS
SYMBOL
DESCRIPTION
SYMBOL
DESCRIPTION
Choke
Transmission
Parking Brake
Spinning Blade
Spring Tension on Idler
Oil
48071S
On/Start
Off/Stop
Falling Hazard
Fast
Thrown Object Hazard
Slow
Continuously Variable - Linear
Pinch Point
Cutting Element - Basic Symbol
Cutting Element - Engage
Cutting Element - Disengage
CE Mark
481039S
Hour meter/Elapsed Operating Hours
STT MODELS
Seat must be installed under the seat
hold down bracket during installation.
Failure to secure the seat under the hold
down bracket could result in serious
injury or death in a roll over.
Thrown Object Hazard
Keep Bystanders Away
Read Operator's Manual
2
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Section 2
SAFETY INFORMATION
2.1 INTRODUCTION
DANGER
Your mower is only as safe as the operator. Carelessness
or operator error may result in serious bodily injury
or death. Hazard control and accident prevention are
dependent upon the awareness, concern, prudence, and
proper training of the personnel involved in the operation,
transport, maintenance and storage of the equipment.
Make sure every operator is properly trained and
thoroughly familiar with all of the controls before operating
the mower.The owner/user can prevent and is responsible
for accidents or injuries occurring to themselves, other
people or property.
The signal word “DANGER” denotes that an extremely
hazardous situation exists on or near the machine that
could result in high probability of death or irreparable
injury if proper precautions are not taken.
WARNING
The signal word “WARNING” denotes that a hazard exists
on or near the machine that can result in injury or death if
proper precautions are not taken.
READ THIS OPERATOR’S MANUAL BEFORE
ATTEMPTING TO STARTYOUR MOWER.
A replacement manual is available from your authorized
Scag Service Dealer or by contacting Scag Power
Equipment, Service Department at P.O. Box 152, Mayville,
WI 53050 or contact us via the Internet at www.scag.com.
The manual for this machine can be downloaded by using
the model and serial number or use the contact form to
make your request. Please indicate the complete model
and serial number of your Scag product when requesting
replacement manuals.
CAUTION
The signal word “CAUTION” is a reminder of safety
practices on or near the machine that could result in
personal injury if proper precautions are not taken.
Your safety and the safety of others depends significantly
upon your knowledge and understanding of all correct
operating practices and procedures of this machine.
2.2 SIGNAL WORDS
2.3 BEFORE OPERATION
CONSIDERATIONS
1. NEVER allow children to operate this riding mower.
Do not allow adults to operate this machine without
proper instructions.
This symbol means “Attention! Become Alert! Your
Safety is Involved!" The symbol is used with the following
signal words to attract your attention to safety messages
found on the decals on the machine and throughout this
manual. The message that follows the symbol contains
important information about safety. To avoid injury and
possible death, carefully read the message! Be sure to
fully understand the causes of possible injury or death.
2. Do not mow when children and/or others are
present. Keep children out of the mowing area and
in the watchful care of a responsible adult other than
the operator. Be alert and turn machine off if a child
enters the area.
3. DO NOT allow children to ride or play on the
machine, it is not a toy.
SIGNAL WORD:
4. Clear the area to be mowed of objects that could be
picked up and thrown by the cutter blades.
It is a distinctive word found on the safety decals on the
machine and throughout this manual that alerts the viewer
to the existence and relative degree of the hazard.
5. DO NOT carry passengers.
6. DO NOT operate the machine under the influence of
alcohol or drugs.
3
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Section 2
7. If the operator(s) or mechanic(s) cannot read English
or Spanish, it is the owner's responsibility to explain
this material to them.
12. DO NOT add fuel to a running or hot engine. Allow
the engine to cool for several minutes before adding
fuel. Never fuel indoors or inside enclosed trailers.
8. DO NOT wear loose fitting clothing. Loose clothing,
jewelry or long hair could get tangled in moving
parts. Do not operate the machine wearing shorts;
always wear adequate protective clothing including
long pants. Wearing safety glasses, safety shoes and
a helmet is advisable and is required by some local
ordinances and insurance regulations.
13. Keep flammable objects (cigarettes, matches, etc.),
open flames and sparks away from the fuel tank and
fuel container. Use only approved containers.
14. Equipment must comply with the latest requirements
per SAE J137 and/or ANSI/ASAE S279 when driven
on public roads.
- NOTe -
If the mower is driven on public roads, it must
comply with state and local ordinances as well as
SAE J137 and/or ANSI / ASAE S279 requirements.
Contact your local authorities for regulations and
equipment requirements.
WARNING
Always wear hearing protection. Operating this
machine over prolonged periods of time can
cause loss of hearing.
15. Do not operate without the side discharge chute
installed and in the down position or with an optional
grass catcher or mulch plate completely installed.
9. Keep the machine and attachments in good
operating condition. Keep all shields and safety
devices in place. If a shield, safety device or decal
is defective or damaged, repair or replace it before
operating the machine.
16. Check the blade mounting bolts at frequent intervals
for proper tightness.
17. Make sure all hydraulic fluid connections are tight
and all hydraulic hoses and lines are in good
condition before starting the machine.
WARNING
2.4 OPERATION CONSIDERATIONS
This machine is equipped with an interlock system
intended to protect the operator and others from
injury. This is accomplished by preventing the
engine from starting unless the deck drive is
disengaged, the parking brake is on, the steering
control levers are in the neutral position and the
operator is in the seat. The system shuts off the
engine if the operator leaves the seat with the deck
drive engaged and/or the steering control levers
are not in the neutral position and the parking
brake is not engaged. Never operate equipment
with the interlock system disconnected or
malfunctioning.
1. Know the function of all controls and how to stop
quickly.
WARNING
DO NOT operate on steep slopes.To check a slope,
attempt to back up it (with the cutter deck down).
If the machine can back up the slope without the
wheels slipping, reduce speed and use extreme
caution. Under no circumstances should the
machine be operated on slopes greater than 15
degrees. ALWAYS FOLLOW OSHA APPROvED
OPERATION.
10. Be sure the interlock switches are functioning
correctly.
2. Reduce speed and exercise extreme caution on
slopes and in sharp turns to prevent tipping or loss
of control. Be especially cautious when changing
directions on slopes.
11. Fuel is flammable; handle it with care. Fill the fuel
tank outdoors. Never fill it indoors. Use a funnel or
spout to prevent spillage. Clean up any spillage
before starting the engine.
4
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Section 2
3. To prevent tipping or loss of control, start and stop
smoothly, avoid unnecessary turns and travel at
reduced speed.
15. The machine and attachments should be stopped
and inspected for damage after striking a foreign
object, and damage should be repaired before
restarting and operating the machine.
4. When using any attachment, never direct the
discharge of material toward bystanders or allow
anyone near the machine while in operation.
CAUTION
Do not touch the engine or the muffler while the
engine is running or immediately after stopping.
These areas may be hot enough to cause a
burn.
5. Before attempting to start the engine, with the
operator in the seat, disengage power to the cutter
deck, place the steering control levers in the neutral
position and engage the parking brake.
6. If the mower discharge ever plugs, shut off the
engine, remove the ignition key, and wait for all
movement to stop before removing the obstruction.
WARNING
DANGER
DO NOT use your hand to dislodge the clogged
discharge chute. Use a stick or other device to
remove clogged material after the engine has
stopped running and the blades have stopped
turning.
DO NOT run the engine inside a building or
a confined area without proper ventilation.
Exhaust fumes are hazardous and contain
carbon monoxide which can cause brain injury
and death.
7. Be alert for holes, rocks, roots and other hidden
hazards in the terrain. Keep away from any drop-
offs. Beware of overhead obstructions (low limbs,
etc.), underground obstacles (sprinklers, pipes, tree
roots, etc.). Cautiously enter a new area. Be alert for
hidden hazards.
16. Keep hands and feet away from cutter blades and
moving parts. Contact can injure.
17. Transport the mower using a heavy duty trailer
or truck. Insure the trailer or truck has all of the
necessary lighting and markings as required by
laws, codes, and ordinances. Secure a trailer with a
safety chain.
8. Disengage power to cutter deck before backing up.
Do not mow in reverse unless absolutely necessary
and then only after observation of the entire area
behind the mower. If you must mow in reverse,
maintain a constant lookout to the rear of the
machine and mow slowly.
18. Be cautious when loading and unloading onto
trailers or trucks. Use only a full width ramp. Ramp
angle should be no more than 15 degrees. Back up
the ramp and drive down forward.
19. When transporting the mower, make sure the park
brake is engaged, the steering control levers are in
the neutral position, the engine is off with the key
removed, and the wheels have been blocked.
9. DO NOT turn sharply. Use care when backing up.
10. Disengage power to cutter deck before crossing
roads, walks or gravel drives.
11. Mow only in daylight or good artificial light.
20. Tie the mower down securely using straps, chains,
cable, or ropes. Both front and rear straps must be
directed down and outward from machine.
12. NEVER raise the deck with the blades engaged.
13. Take all possible precautions when leaving the
machine unattended, such as disengaging the
mower, lowering the attachments, setting the parking
brake, stopping the engine, and removing the key.
21. Use care when approaching blind corners, shrubs,
trees, or other objects that may obscure vision.
22. NEVER leave the machine running unattended.
14. Disengage power to the attachments when
transporting or when not in use.
5
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Section 2
Any or all parts of the Roll-Over Protection System MUST
NOT be removed. Failure to adhere to this guideline could
result in injury or death.
2.5 ROLL-OvER PROTECTION SYSTEM
WARNING
FOLDABLE ROLL-OvER PROTECTION SYSTEM
(IF EqUIPPED)
Reduce speed when turning, operating on slopes,
slick or wet surfaces. Allow extra distance to
stop.
WARNING
Keep the roll bar in the raised and locked position
and the seat belt securely fastened during
operation. Failure to do so could cause serious
injury or loss of life.
Stay off of slopes too steep for safe operation.
To check a slope, attempt to back up it (with the
cutter deck down). If the machine can not back
up the slope without the wheels slipping, do not
operate the machine on this slope. Under no
circumstances should the machine be operated
on slopes greater than 15 degrees.
Lower the roll bar only when absolutely necessary.
DO NOT mow near drop-offs, ditches or
embankments. The machine could suddenly roll
over if a wheel goes over the edge or if the edge
caves in.
WARNING
Operate the machine smoothly, no sudden turns,
starts or stops on a slope.
There is no roll-over protection when the roll bar
is in the down position.
NEvER tow on slopes. The weight of the towed
equipment may cause loss of traction and loss
of control.
Lower the roll bar only when absolutely
necessary.
Raise the roll bar as soon as clearance permits.
DO NOT permit untrained personnel to operate
the machine.
DO NOT wear the seat belt when the roll bar is in
the down position.
Be cautious when loading and unloading onto
trailers or trucks.
ALWAYS wear seat belt when roll bar is in the up
position.
Use only a full width ramp.
Operate the machine smoothly, no sudden turns,
starts or stops.
Ramp angle should be no more than 15
degrees.
Check the area carefully before mowing for proper
overhead clearance (i.e. branches, doorways,
etc.).
Back up the ramp and drive down forward.
This mower has been designed for good traction and
stability under normal mowing conditions. However,
caution must be used when traveling on slopes, especially
when the grass is wet. Do not mow on wet grass. Wet
grass reduces traction and steering control.
DO NOT contact any overhead object with the
roll bar.
1. To lower the roll bar, loosen the tension knob on both
the left hand and right hand bar. See Figure 2-1.
6
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Section 2
2. Remove the hairpin cotter pins and remove the two
(2) lock pins. See Figure 2-2.
WARNING
3. Lower the roll bar to the down position.
Failure to properly inspect and maintain the seat
belt can cause serious injury or loss of life.
4. To raise the roll bar, lift the bar to the upright
position.
5. Install the two (2) lock pins through the hole, secure
with the two (2) hairpin cotter pins and tighten the
tension knobs. See Figure 2-2. Remove the seat belt
from the retainer brackets.
1. Check the full length of the seat belt webbing for
cuts, wear, fraying, dirt and stiffness. See Figure 2-3.
2. Check the seat belt webbing in areas exposed to
ultra violet rays from the sun or extreme dust or
dirt. If the original color of the webbing in these
areas is extremely faded and/or is packed with dirt,
the physical strength of this webbing may have
deteriorated. If this condition exists, replace the seat
belt system.
UPRIGHT AND
LOCKED POSITION
3. Check the buckle and latch for proper operation
and determine if the latch plate is excessively worn,
deformed, or if the buckle is damaged or cracked.
See Figure 2-3.
TENSION
KNOBS
INSPECT BUCKLE
& LATCH
INSPECT WEBBING
Figure 2-1. Foldable Roll-Over Protection System
HAIR PIN
Figure 2-3. Seat Belt Inspection
TENSION
KNOB
LOCK PIN
Figure 2-2. ROPS Hinge
The potential exposure of the seat belt to severe
environmental conditions make it crucial to inspect the
seat belt system regularly.
It is recommended that the seat belt be inspected on a
daily basis for signs of damage. Any seat belt system
that shows cuts, fraying, extreme or unusual wear,
significant discoloration due to UV exposure, dirt or
stiffness, abrasion to the seat belt webbing, or damage
to the buckle, latch plate, hardware or any other obvious
problem should be replaced immediately.
7
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Section 2
2.6 MAINTENANCE CONSIDERATIONS &
STORAGE
WARNING
1. Never make adjustments to the machine with the
engine running unless specifically instructed to do
so. If the engine is running, keep hands, feet, and
clothing away from moving parts.
Hydraulic fluid is under high pressure. Keep body
and hands away from pinholes or nozzles that
eject hydraulic fluid under high pressure. If you
need service on your hydraulic system, please
see your authorized Scag dealer. If hydraulic
fluid is injected into the skin, it must be surgically
removed within a few hours by a doctor or
gangrene may result.
2. Disengage drives, lower implement, set parking
brake, stop engine and remove key or disconnect
spark plug wire to prevent accidental starting of the
engine when servicing or adjusting the machine.
Wait for all movement to stop before adjusting,
cleaning or repairing.
3. Disconnect battery or remove spark plug wire before
making any repairs. Disconnect the negative terminal
first and the positive last. Reconnect the positive first
and the negative last.
13. Let the engine cool before storing.
14. DO NOT store the machine near an open flame.
15. Shut off fuel while storing or transporting.
16. DO NOT store fuel near flames or drain indoors.
4. Keep all nuts, bolts and screws tight, to ensure the
machine is in safe working condition. Check blade
mounting bolts frequently to be sure they are tight.
17. Charge batteries in an open, well ventilated area,
away from spark and flames. Unplug charger before
connecting or disconnecting from battery. Wear
protective clothing and use insulated tools.
5. Do not change the engine governor settings or
overspeed the engine. See the engine operator's
manual for information on engine settings.
6. To reduce fire hazard, keep the cutting units, drives,
muffler and engine free of grass, leaves, excessive
grease, oil and dirt.
2.7 USING A SPARK ARRESTOR
The engine in this machine is not equipped with a spark
arrestor muffler. It is in violation of California Public
Resource Code Section 4442 to use or operate this
engine on or near any forest covered, brush covered or
grass covered land unless the exhaust system is equipped
with a spark arrestor meeting any applicable local or state
laws. Other states or federal areas may have similar laws.
Check with your state or local authorities for regulations
pertaining to these requirements.
7. Park the machine on level ground and engage the
parking brake.
8. NEVER allow untrained personnel to service the
machine.
9. Use care when checking blades. Use a Blade Buddy,
wrap the blade(s) or wear gloves and USE CAUTION
when servicing blades. Only replace blades. NEVER
straighten or weld blades.
10. Keep all parts in good working condition. Replace all
worn or damaged decals.
11. Use jack stands to support components when
required.
12. Carefully release pressure from components with
stored energy.
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Section 2
2.8 SAFETY AND INSTRUCTIONAL DECALS
WARNING
INSTALL BELT COvER BEFORE
OPERATING MACHINE
READ OPERATOR'S MANUAL
483402
483402
483407
FORWARD
483407
R
F
REvERSE
481568
483406
483397
483397
483425
483633
483429
483300
483444
483444
390S0150G
482710
9
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Section 3
SPECIFICATIONS
3.1 ENGINE
General Type ................................................................................................Heavy Duty Industrial/Commercial Gasoline
Model:
Scag Model STT52V-27CH, STT61V-27CH.......................................................................Kohler Command CH740S
Scag Model STT61V-27KA ............................................................................................................ Kawasaki FD750D
Scag Model STT61V-29DFI-SS, STT-29DFI-SS ............................................................................ Kawasaki FD791D
Scag Model STT61V-35BVAC-SS, STT-35BVAC-SS........................................................Briggs & Stratton Vanguard
Horsepower @ 3800 RPM:
Scag Model STT52V-27CH, STT61V-27CH...................................................27HP (Kohler Spec. #PS-CH740-3114)
Scag Model STT61V-27KA ..........................................................................27HP (Kawasaki Spec. #FD750D-CS08)
Scag Model STT61V-29DFI-SS, STT-29DFI-SS ..........................................29HP (Kawasaki Spec. #FD791D-CS04)
Scag Model STT61V-35BVAC-SS, STT-35BVAC-SS....................35HP (Briggs & Stratton Spec. #613477-0132-E1)
Displacement:
Kohler CH740S................................................................................................................................................... 725cc
Kawasaki FD750D and FD791D ........................................................................................................................ 745cc
Briggs & Stratton ................................................................................................................................................ 993cc
Type:
Kohler...................................................................................4-Cycle, Air-Cooled, Naturally Aspirated Gasoline, OHV
Kawasaki (FD750D) .............................................................4-Cycle, Air-Cooled, Naturally Aspirated Gasoline, OHV
Kawasaki (FD791D) ..................................................... 4-Cycle, Liquid-Cooled, Digital Fuel Injection Gasoline, OHV
Briggs & Stratton .................................................................................4-Cycle, Air-Cooled, Naturally Aspirated, OHV
Cylinders..................................................................................................................................... 2 with Cast Iron Sleeves
Governor........................................................................Mechanical Type with Variable Speed Control Set At 3800 RPM
Idle Speed:
Kohler..........................................................................................................................................................1400 RPM
Kawasaki.....................................................................................................................................................1400 RPM
Briggs & Stratton .........................................................................................................................................1750 RPM
Carburation:
Kohler.......................................................... Fixed Jet Carburetor with Smart-Choke™ and Fuel Shutdown Solenoid
Kawasaki (FD750D) ................................................................................................... Fixed Jet Downdraft Carburetor
Kawasaki (FD791D) .....................................................................................................................Digital Fuel Injection
Briggs & Stratton ..........................................................................................................Fixed Jet Sidedraft Carburetor
Fuel Pump:
Kohler.................................................................................................................... Mechanical with In-Line Fuel Filter
Kawasaki..............................................................................................High Pressure Electric with In-Line Fuel Filter
Briggs & Stratton ...................................................................................................Mechanical with IN-Line Fuel Filter
Fuel...................................................................................... Non-Leaded Gasoline with a Minimum Octane Rating of 87
Oil Pump...........................................................................................................................Full Pressure w/Full-Flow Filter
Starter........................................................................................................................Electric Starting with Solenoid Shift
Belts.................................................................................................................Kevlar cord. Self-adjusting, Self-tightening
3.2 ELECTRICAL
Battery.................................................................................................................................................................... 12 Volt
Charging System............................................................................................................................................... Alternator
Charging Output:
Kohler..................................................................................................................................................12 Volt, 15 Amp
Kawasaki.............................................................................................................................................12 Volt, 20 Amp
Briggs & Stratton .................................................................................................................................12 Volt, 20 Amp
System Polarity.......................................................................................................................................Negative Ground
Interlock Switches....................................................... Seat, Neutral Control, Mower Engagement (BBC), Parking Brake
Instrument Panel ...................................................... Ammeter, Key Switch, Throttle Lever, Manual Choke, BBC Switch,
Fuses and Safety Start module, Temp. Gauge (KA), Check Engine Indicator (DFI)
Fuses........................................................................................................................................................Two (2) 20 Amp
10
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Section 3
3.3 POWER HEAD
Drive System ............... Hydraulic Drive with Two Variable Displacement Pumps and Two Cast-Iron High Torque Motors
Hydrostatic Pumps .....................................................................Two Hydro-Gear™ 16 cc/rev. Pumps with Dump Valves
Drive Wheel Motors: ............................ Two Hydro-Gear™ or Ross Model TG 15 cu. inch Cast-Iron High Torque Motors
Steering/Travel Control...........................................................................................Twin Lever Fingertip Steering Control
with Individual Control to Each Wheel with Gas Spring Dampers
Parking Brake ...................................................................Lever Actuated Linkage to Brakes on Both Drive Wheel Axles
Wheels:
(2) Front Caster - (52" Deck) .......................................................................................... 13 X 5.00 Four-Ply, Flat Free
(2) Front Caster - (61" & 72" Deck) ................................................................................ 13 X 6.50 Four Ply, Flat Free
(2) Drive - (52" Deck).................................................... 23 X 10.50 X 12 Four-Ply Pneumatic Tubeless, Radius Edge
(2) Drive - (61" & 72" Deck)................................................ 24 x 12 x 12 Four-Ply Pneumatic Tubeless, Radius Edge
Tire Pressure:
Front Caster....................................................................................................................................................Flat Free
Drive.................................................................................................................................................................. 12 PSI
Fuel Tank .....................................10-Gallon Seamless Polyethylene Tank with Large Opening and Fuel Gauge Fill Cap
Seat ............................................................................................................... Padded, Thick Cushion with Tall Back Rest
Travel Speed.................................................................................................................... 27HP.....................29HP/35HP
Forward.........................................................................................................................0-10 MPH....................0-12 MPH
Reverse .........................................................................................................................0-5 MPH.......................0-6 MPH
-NOTE- The machine will travel at 10 mph or 12 mph for transport purposes. For best cutting performance the forward
travel speed should be adjusted depending upon the cutting conditions.
3.4 CUTTER DECK
Type......................... Floating, Adjustable, Anti-Scalping, Hybrid Design Combines Out-Front and Belly-Mount Designs
Construction ............................................................................................................................Tri-Plate deck construction
Top of deck consists of three steel plates totaling nearly 1/2" of steel.,7-gauge (3/16") deck skirt.
True Cutting Width:
52V........................................................................................................................................................52" (132.0 cm)
61V........................................................................................................................................................61" (155.0 cm)
72VS...................................................................................................................................................71.5" (181.6 cm)
72A.....................................................................................................................................................71.5" (181.6 cm)
Cutting Height Adjustment...........Foot-Operated Lever Adjustment from Operator's Seat, 1.0" to 6.0" in 1/4"increments
Cutter Blades.........................................................................197 or .250 Thick, Milled Edge, Wear Resistant Marbain™
52V.............................................................................................................................................. Three (3) 18" blades
61V.............................................................................................................................................. Three (3) 21" blades
72VS......................................................................................................................................... Three (3) 24.5" blades
72A........................................................................................................................................... Three (3) 24.5" blades
Blade Engagement............................................................Electric Blade Engagement Clutch with Control Panel Switch
Connected to the Cutter Deck Gearbox through a Drive Shaft.
Discharge Opening....................Extra-Wide Discharge Opening with Spring-Loaded Discharge Chute and Turbo Baffle
Discharge Chute...................................................................................................Black, Polypropylene (Plastic), Flexible
Spindles......................................Heavy-Duty 1-1/8" Top Dimension Spindle Shaft, Cast Housing, Taper Roller Bearing,
Low Maintenance with Top Access Grease Fitting and Grease Overfill Relief Poppet
Spindle Pulleys............................................................................................ Split Steel with Easily Removed Taper Hubs
Cutter Deck Belts..................................................................B-Section with Kevlar Cord, Self-Adjusting, Self-Tightening
Electric Clutch Type................................................................................................Ogura Heavy Duty PTO Clutch Brake
Drive Shaft............................................................................................Clamp Yoke Shaft With Two High-Speed U-Joints
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Section 3
3.5 HYDRAULIC SYSTEM
Hydraulic Oil Filter ........................................................................................................ 10 Micron Spin-on Element Type
Hydraulic Reservoir .....................................................................................................................Nylon; 3 Quart Capacity
3.6 WEIGHTS AND DIMENSIONS
52v
61v
72A / 72vS
Length......................................................................................... 83" ...............................87.5"...................................90"
Tracking Width ............................................................................ 51" ................................ 56" ....................................56"
Overall Width w/chute down ......................................................64.5"..............................73.5"...................................83"
Overall Width w/chute up............................................................ 53" ................................ 62" ....................................73"
Overall Height w/ROPS up ........................................................67.5"..............................67.5"................................67.5"
Overall Height w/ROPS down....................................................56.5"..............................56.5"................................56.5"
Operating Weight w/ROPS....................................................... 1250#............................1350#.............................1400#
Operating Weight w/ROPS and 35BV Engine.............................NA ..............................1445#.............................1495#
3.7 PRODUCTIvITY
52v
61v
72A / 72vS
Cutting Width.............................................................................. 52" ................................ 61" ....................................72"
Acres Per Day.............................................................................20.2 .............................. 23.7.....................................28
The preceding chart will aid you in determining how many acres your Scag mower will cut per day. The chart is an
estimate based on 8 hours per day cutting time at 6 MPH with a 20% allowance for overlap and turns.
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Section 4
OPERATING INSTRUCTIONS
2. Mower Deck Switch (Figure 4-1). Used to engage
and disengage the mower drive system. Pulling up
on the switch will engage the deck drive. Pushing
down on the switch will disengage the deck drive.
CAUTION
Do not attempt to operate this mower unless you
have read this manual. Learn the location and
purpose of all controls and instruments before
you operate this mower.
3. Engine Choke Control (Figure 4-1). Used to start
a cold engine. Not used on the 29DFI.
4. Engine Throttle Control (Figure 4-1). Used to
control the engine speed. Pushing the lever forward
increases engine speed. Pulling the lever back
decreases engine speed. Full back position is the
IDLE position. Full forward is the cutting position.
4.1 CONTROLS AND INSTRUMENT
IDENTIFICATION
5. Ammeter (Figure 4-1). Indicates the condition of
the charging system. When the engine is running
the needle should be toward the positive end of the
meter. If the needle is toward the negative end of the
meter, this indicates a discharge condition and the
machine should be taken in for service.
Before operating the mower, familiarize yourself with all
mower and engine controls. Knowing the location, function
and operation of these controls is important for safe and
efficient operation of the mower.
1. Ignition Switch (Figure 4-1). The ignition switch
is used to start the engine and has three positions;
OFF, ON, and START.
DECK LIFT
RIGHT STEERING
CONTROL
LEFT STEERING
CONTROL
CUTTING HEIGHT
ADJUSTMENT
PARKING BRAKE
WATER TEMPERATURE
CONTROL
MOWER DECK
SWITCH
DECK RELEASE
SEAT BELT
AMMETER
ENGINE THROTTLE
CONTROL
IGNITION SWITCH
ENGINE
CHOKE
CONTROL
CHECK
ENGINE
LIGHT
FUEL GAUGE
FUSES
KAWASAKI DFI ONLY
DUMP vALvE
HOUR METER
DUMP vALvE
2006 STTCHMI
Figure 4-1. Controls and Instruments
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Section 4
6. Hourmeter (Figure 4-1). Indicates the number of
hours the engine has been operated. It only operates
when the engine is running. Has preset maintenance
reminders for engine and hydraulic system oil
changes. Will start flashing scheduled maintenance
2 hours before preset time and continue flashing
until 2 hours after. Automatically resets.
14. Cutting Height Adjustment (Figure 4-1). Used to
set the cutter deck at the desired cutting height.
15. Deck Release Lever (Figure 4-1). Used to lock the
cutter deck in the transport position. Push the foot
pedal forward and pull back on the release lever to
release the cutter deck for normal mowing.
16. Temperature Gauge (Figure 4-1). Indicates the
operating temperature of the engine. Used on
mowers with the liquid-cooled engine only.
7. Fuse Holders (Figure 4-1). Two 20-amp fuses
protect the mower’s electrical system. To replace
fuses, pull fuse out of the socket and install a new
fuse.
17. Check Engine Light (Figure 4-1). Indicates the
operation of the engine sensors on the Kawasaki
Digital Fuel Injection (DFI). Light will flash once at
initial start up. If a problem occurs with a sensor
on the engine, the light will flash a code. See your
authorized Scag Dealer for diagnosis and repair.
8. Left Steering Control (Figure 4-1). Used to control
the mower's left wheel when traveling forward or
reverse.
9. Right Steering Control (Figure 4-1). Used to
control the mower's right wheel when traveling
forward or reverse.
18. Seat Belt (Figure 4-1). Used to secure the operator.
Seat belt must be worn at all times when the ROPS
is in the upright and locked position.
10. Parking Brake Control (Figure 4-1). Used to
engage and disengage the parking brakes. Pull the
lever back to engage the parking brakes. Push the
lever forward to disengage the parking brakes.
19. Seat Hold Down Release Latch (Figure 4-1).
Located behind the seat. Used to secure the seat
in the operator's position. Release the latch to gain
access under the seat.
11. Fuel Tank Gauge (Figure 4-1). Indicates the
amount of fuel in the fuel tank.
4.2 SAFETY INTERLOCK SYSTEM
12. Dump valve Control Levers (Figure 4-2). Located
on the hydraulic pumps, used to “free-wheel” the
mower. Rotating the levers clockwise until they stop
allows the unit to move under hydraulic power. The
levers must be in this position and torqued to 10 lb-ft
during operation of the mower. Rotating the levers
counter-clockwise allows the mower to be moved by
hand (free-wheeling).
The mower is equipped with a safety interlock system that
prevents the engine from starting unless the deck drive is
disengaged, the parking brake is engaged, the steering
control levers are in the neutral position and the operator
is in the seat. The interlock system shuts off the engine
if the operator leaves the seat with the steering control
levers not in the neutral position and/or the cutter blades
engaged and the parking brake not engaged.
DUMP VALVE
CONTROL
WARNING
Never operate the mower with the interlock
system disconnected or malfunctioning. Do not
disengage or bypass any switch;injury to yourself
and others or property damage could result.
390S141-1
Figure 4-2. Dump Valve Control
13. Deck Lift Foot Lever (Figure 4-1). Used to raise
and lower the cutter deck. Push full forward to lock in
the transport position.
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Section 4
9. Allow engine to warm before operating the mower.
4.3 INITIAL RUN-IN PROCEDURES
4.5 GROUND TRAvEL AND STEERING
FIRST DAY OF USE OR APPROxIMATELY 20 HOURS
1. Check all belts for proper alignment and wear at 2, 4
and 8 hours.
- IMPORTANT -
If you are not familiar with the operation of a
machine with lever steering and/or hydrostatic
transmissions, the steering and ground speed
operations should be learned and practiced in
an open area, away from buildings, fences, or
obstructions.
2. Change the engine oil and oil filter after the first 20
hours of operation. (See Section 7.4.)
3. Check hydraulic oil level in reservoir. (See Section
7.3.)
4. Check for loose hardware. Tighten as needed.
Learn the operation on flat ground before operating
on slopes.
5. Check interlock system for proper operation. (See
Section 4.2.)
Start practicing with a slow engine speed and slow
forward travel.
6. Check tire pressure. Adjust pressure if necessary.
(See Section 7.10.)
Learn to feather the steering controls to obtain a
smooth operating action.
4.4 STARTING THE ENGINE
Practice operating the mower until you are
comfortable with the controls before proceeding
to mow.
CAUTION
FORWARD TRAvEL
DO NOT USE STARTING FLUIDS. Use of starting
fluids in the air intake system may be potentially
explosive or cause a“runaway”engine condition
that could result in engine damage and/or
personal injury.
To travel forward with the mower, disengage the parking
brake, pull levers inward out of the neutral lock position
and slowly push the steering control levers forward an
equal distance. The further the steering control levers
are pushed forward the greater the forward speed will
be. To increase the speed, push the steering control
levers further forward and to decrease the speed, pull the
steering control levers back.
1. Be sure the fuel shutoff valve, located behind the
operator's seat, is fully open. (See Section 7.5.)
2. Secure the ROPS in the upright and locked position.
To stop the forward travel, pull the steering control levers
back to the neutral position.
3. Sit in the operator’s seat, fasten seat belt and place
the steering control levers in the neutral position.
To steer the mower left while traveling forward, pull the left
steering lever back. The further the lever is pulled back,
the quicker the mower will turn left.
4. Engage the parking brake.
5. Place the PTO switch in the disengaged position.
6. If the engine is cold, choke the engine as needed.
To steer the mower right while traveling forward, pull the
right steering control lever back. The further the lever is
pulled back, the quicker the mower will turn right.
7. Move the engine throttle control to about half engine
speed.
8. Turn the ignition key to the START position and
release the key as soon as the engine starts. Do
not hold the key in the START position for more
than 15 seconds at a time. Allow at least 60
seconds between each cranking attempt to prevent
overheating of the starter motor. Prolonged cranking
can damage the starter motor and shorten battery
life.
- NOTe -
Smooth operation of the steering levers will
produce smooth mower operation. While learning
the operation of the steering controls, keep the
travel speed low.
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Section 4
- IMPORTANT -
To stop the reverse travel, allow the steering control levers
to return to the neutral position. If the mower is to be
parked, place the handles in the neutral lock position and
engage the parking brake.
Do not travel forward over a curb. The mower will
hang up on the curb. Raise the deck and travel
backwards over the curb at a 45 degree angle.
(See Section 4.1, items 13 - 15, on page 14 for
cutter deck raising descriptions.)
4.6 ENGAGING THE DECK DRIvE (CUTTER
BLADES)
REvERSE TRAvEL
1. Set the throttle at about 3/4 speed. Do not attempt to
engage the deck drive at high speed as this shortens
the electric clutch life — use only moderate engine
speed when engaging the deck drive.
CAUTION
Disengage power to the mower before backing
up. Do not mow in reverse unless absolutely
necessary and then only after observation of the
entire area behind the mower.
2. Engage the deck drive by pulling out on the yellow
switch, located on the instrument panel, to the
engage position. See Figure 4-3.
CAUTION
PULL UP TO ENGAGE
Before backing up, observe the rear for persons
and obstructions. Clear the area before backing
up. Possible injury or property damage could
occur.
PUSH DOWN TO DISENGAGE
390S0138
Figure 4-3. Cutter engage Switch
- NOTe -
To travel in reverse, pull levers inward out of the neutral
lock position and pull both handles back. Keep the travel
speed low while traveling in reverse.
A squealing noise may be heard when engaging
or disengaging the deck drive. It is caused by the
electric clutch plates meshing as the mower comes
up to speed. This is normal.
- NOTe -
The mower may not travel straight in reverse.
Slight adjustments may need to be made using
the steering controls.
3. To disengage the deck drive, push the switch in to
the disengage position.
To steer left while traveling in reverse, allow the left
steering control lever to move forward. The further the
control is allowed to move forward, the quicker the mower
will turn left.
4. Always operate the engine at full throttle to properly
maintain cutting speed. If the engine starts to lug
down, reduce the forward speed and allow the
engine to operate at maximum RPM.
To steer right while traveling in reverse, allow the right
steering control lever to move forward. The further the
control is allowed to move forward, the quicker the mower
will turn right.
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Section 4
4.7 HILLSIDE OPERATION
4.9 AFTER OPERATION
1. Wash the entire mower after each use. Do not
use high pressure spray or direct the spray onto
electrical components.
WARNING
- IMPORTANT -
DO NOT operate on steep slopes.To check a slope,
attempt to back up it (with the cutter deck down).
If the machine can back up the slope without the
wheels slipping, reduce speed and use extreme
caution. Under no circumstances should the
machine be operated on slopes greater than 15
degrees. ALWAYS FOLLOW OSHA APPROvED
OPERATION.
Do not wash a hot or running engine. Cold water
will damage the engine. Use compressed air to
clean the engine if it is hot.
2. Keep the entire mower clean to inhibit serious heat
damage to the engine or hydraulic oil circuit.
3. Check the drive belts for proper alignment and any
signs of wear. Correct and adjust if necessary.
1. This mower has been designed for good traction
and stability under normal mowing conditions.
However, caution must be used when traveling on
slopes, especially when the grass is wet. Wet grass
reduces traction and steering control. The Roll-Over
Protection System is standard equipment for this
machine. See Section 2.5, page 6 of this manual for
further details.
DANGER
To avoid injury from burns, allow the mower
to cool before removing the fuel tank cap and
refueling.
2. To prevent tipping or loss of control, do not start or
stop suddenly, avoid unnecessary turns and travel
at reduced speed. If tires loose traction, disengage
blades and proceed slowly off the slope.
4. After the mower has cooled down, fill the fuel tank
with fresh, clean fuel at the end of every day of
operation. See Engine Owner's Manual for proper
octane requirements.
3. Avoid sudden starts when mowing uphill. Sudden
starts may cause the machine to tip backwards.
5. Check the tire pressure. Adjust pressure if
necessary.
4. Loss of traction may occur when traveling down hill.
Weight transfers to the front of the machine and
may cause the drive wheels to slip causing loss of
braking or steering.
4.10 REMOvING CLOGGED MATERIAL
5. Keep tires properly inflated.
DANGER
4.8 PARKING THE MOWER
ROTATING BLADES
1. Park the machine on a flat, level surface only. Do not
park the machine on an incline.
NEvER PUTYOUR HANDS INTOTHE DISCHARGE
CHUTE FOR ANY REASON!
2. Place the steering control levers in the neutral
position.
Shut off the engine and remove the key and
only then use a stick or similar object to remove
material if clogging has occurred.
3. Disengage the cutter blades.
4. Slow the engine to idle speed.
5. Engage the parking brake.
1. If the discharge chute becomes clogged, shut off
the engine and remove the ignition key. Using a stick
or similar item, dislodge the clogged material. Then
resume normal mowing.
6. Turn the ignition key to the OFF position and remove
the key.
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Section 4
4. Keep mower and discharge chute clean.
4.11 MOvING MOWER WITH ENGINE
STOPPED
5. When mowing wet or tall grass, mow the grass twice.
Raise the mower to the highest setting for the first
pass and then make a second pass to the desired
height.
To “free-wheel” or move the mower around without the
engine running, rotate the dump valve levers counter-
clockwise. See Figure 4-4. Disengage the parking brake
and move the mower by hand. When the machine is in the
desired position, engage the parking brake and rotate the
levers clockwise until they stop. The dump valve levers
must be returned to the DRIVE position and torqued to
10 lb-ft to drive the mower.
6. Use a slow travel speed for trimming purposes.
7. Operate the engine at full throttle for best cutting.
Mowing with a lower RPM causes the mower to tear
the grass. The engine is designed to be operated at
full speed.
8. Use the alternate stripe pattern for best lawn
appearance. Vary the direction of the stripe each
time the grass is mowed to avoid wear patterns in
the grass.
DUMP VALVE
CONTROL
4.13 ADJUSTING CUTTING HEIGHT
The mower deck can be adjusted from a height of 1.0 inch
to 6.0 inches at 1/4-inch intervals. To adjust the cutting
height:
390S141-1
WARNING
Figure 4-4. Dump Valve Control
DO NOT adjust the cutting height with the mower
blades rotating.Disengage the power to the cutter
blades and then adjust cutting height.
4.12 RECOMMENDATIONS FOR MOWING
1. Do not mow with dull blades. A dull blade will tear
grass, resulting in poor lawn appearance and
reduced mowing power.
1. Disengage the power to the cutter blades.
2. Push the cutting height adjustment foot pedal all
the way forward using your right foot until it locks in
place. See Figure 4-5.
WARNING
DO NOT operate without Discharge Chute,
Mulching Kit, or entire Grass Catcher properly
installed.
LANYARD
PIN
3
4
5
1
4 8
1
1 . 5
2
2 . 5
3
3 . 5
4
4 . 5
5
5 . 5
6
H E I G H T
C U T T I N G
2. The discharge chute must not be removed and
must be kept in the lowest position to deflect grass
clippings and thrown objects downward. Direct the
side discharge away from sidewalks or streets to
minimize cleanup of clippings. When mowing close
to obstacles, direct the discharge away from the
obstacles to reduce the chance of property damage
by thrown objects.
390S0140-2
HEIGHT ADJUSTMENT PEDAL
3. Cut grass when it is dry and not too tall. Do not cut
grass too short (cut off 1/3 or less of existing grass
for best appearance). Mow frequently.
Figure 4-5. Adjusting Cutting Height
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Section 4
3. Insert the lanyard pin into the cutting height index at
the desired cutting height. Push forward on the deck
lift foot lever, hold in place and pull back on the deck
release lever. See Figure 4-6. Slowly release the foot
pedal. A deck height decal is located on the cutting
height index as an aid in adjusting the deck to the
desired height. See Figure 4-5.
TENSION
KNOB
ROTATE
LEvER
DECK RELEASE
LEVER
TENSION
KNOB
CUTTING
HEIG
6
5.5
HT
5
4.5
4
3.5
3
2.5
2
1.5
1
481543
Figure 4-7. Adjusting Steering Levers
4. The control handle can also be adjusted in two
different positions. If necessary, remove the two
bolts securing the control handle to the control lever.
Install the handle in the desired position.
390S0151-1
4.15 ADJUSTING THE HEIGHT ADJUST
PEDAL
Figure 4-6. Deck Release Lever
1. Position the seat to the desired location.
4.14 ADJUSTING THE STEERING LEvERS
2. While in the operator's position with out the engine
running, push down on the height adjust pedal to
check for full function control.
1. Position the seat to the desired location.
2. While in the operator's position without the engine
running, move both steering levers forward and
reverse to check for full function control and comfort.
3. The height adjust pedal can be located in three (3)
different positions for operator comfort and control.
See Figure 4-8.
3. If adjustment of the steering levers is needed, use
the following instructions to adjust.
3
4
5
4 8 1
1
1 . 5
2
A. Loosen the tension knob on the lever assembly.
2 . 5
3
3 . 5
4
4 . 5
5
5 . 5
6
H E I G H T
C U T T I N G
B. Rotate the steering lever forward or backward to
achieve the optimum operating position.
C. Tighten the tension knob and repeat on the opposite
side.
D. While in the operator's position, bring the steering
levers out of the neutral lock position and check to
make sure both levers are even before operating.
390S0140-2
HEIGHT ADJUSTMENT PEDAL LOCATIONS
Figure 4-8. Height Adjust Pedal Locations
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Section 4
4.16 TOWING (OPTIONAL HITCH
ACCESSORY)
1. NEVER allow children or others in or on towed
equipment.
2. Tow only with a machine that has a hitch designed
for towing. Do not attach towed equipment except at
the hitch point.
3. Follow manufacturer's recommendations for weight
limit for towed equipment. 250 lbs. maximum towing
weight.
4. NEVER tow on slopes. The weight of the towed
equipment may cause loss of traction and loss of
control.
5. Travel slowly and allow extra distance to stop.
6. Zero-turning with a trailer attached could cause
damage to the trailer or mower.
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Section 5
TROUBLESHOOTING CUTTING CONDITIONS
CONDITION
CAUSE
CURE
STRINGERS - OCCASIONAL
BLADES OF UNCUT GRASS
Low engine RPM
Run engine at full RPM
Ground speed too fast
Slow speed to adjust for conditions
Cut grass after it has dried out
Sharpen blades
Wet grass
Dull blades, incorrect sharpening
Deck plugged, grass accumulation
Clean underside of deck
Width of Deck
Belts slipping
Adjust belt tension
SGB020
STREAKING - STRIPS OF
UNCUT GRASS IN CUTTING
PATH
Dull, worn blades
Incorrect blade sharpening
Low engine RPM
Sharpen blades
Sharpen blades
Run engine at full RPM
Adjust belt tension
Belt slipping
Deck plugged, grass accumulation
Ground speed too fast
Wet grass
Clean underside of deck
Slow speed to adjust for conditions
Cut grass after it has dried out
Replace blades
Width of Deck
SGB018
Bent blades
STREAKING - STRIPS OF
UNCUT GRASS BETWEEN
CUTTING PATHS
Not enough overlapping between rows Increase the overlap of each pass
Width
of
Deck
Width
of
Deck
SGB019
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Section 5
TROUBLESHOOTING CUTTING CONDITIONS (CONT'D)
CONDITION
CAUSE
CURE
UNEvEN CUT ON FLAT
GROUND - WAvY HIGH-LOW
APPEARANCE, SCALLOPED
CUT, OR ROUGH CONTOUR
Lift worn from blade
Replace blade
Blade upside down
Mount with cutting edge toward ground
Clean underside of deck
Deck plugged, grass accumulation
Too much blade angle (deck pitch)
Deck mounted improperly
Bent spindle area
Adjust pitch and level
See your authorized SCAG dealer
See your authorized SCAG dealer
Sharpen blade
Width of Deck
Dull blade
SGB020
UNEvEN CUT ON UNEvEN
GROUND-WAvYAPPEARANCE,
HIGH-LOW SCALLOPED CUT,
OR ROUGH CONTOUR
May need to reduce ground speed, raise
cutting height, and/or change direction
of cut
Uneven ground
Width of Deck
SGB021
SLOPING RIDGE ACROSS
WIDTH OF CUTTING PATH
Tire pressures not equal
Wheels uneven
Check and adjust tire pressure
Check and adjust tire pressure
See your authorized SCAG dealer
Deck mounted incorrectly
Deck not level side-to side
Check for level and correct
Width of Deck
SGB023
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Section 5
TROUBLESHOOTING CUTTING CONDITIONS (CONT'D)
CONDITION
CAUSE
CURE
SCALPING - BLADES HITTING
DIRTORCUTTINGvERYCLOSE
TO THE GROUND
Low tire pressures
Check and adjust pressures
Ground speed too fast
Cutting too low
Slow speed to adjust for conditions
May need to reduce ground speed, raise
cutting height, change direction of cut,
and/or change pitch and level
May need to reduce ground speed, raise
cutting height, and/or change direction
of cut
Rough terrain
Width of Deck
Ground speed too fast
Wet grass
Slow speed to adjust for conditions
Cut grass after it has dried out
Adjust pitch and level
SGB022
STEP CUT - RIDGE IN CENTER
OF CUTTING PATH
Blades not mounted evenly
Bent blade
Replace blade
Internal spindle failure
See your authorized SCAG dealer
Mounting of spindle incorrect
See your authorized SCAG dealer
Width of Deck
SGB024
SLOPECUT-SLOPINGRIDGES
ACROSS WIDTH OF CUTTING
PATH
Bent spindle mounting area
Internal spindle failure
See your authorized SCAG dealer
See your authorized SCAG dealer
Bent deck housing
See your authorized SCAG dealer
Width of Deck
SGB025
23
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Section 6
ADJUSTMENTS
- NOTe -
6.1 PARKING BRAKE ADJUSTMENT
If this procedure does not achieve proper brake
adjustment, please contact your authorized Scag
dealer.
WARNING
LOOSEN HERE
Do not operate the mower if the parking brake
is not operable. Possible severe injury could
result.
The parking brake linkage should be adjusted whenever
the parking brake lever is placed in the “ENGAGE”position
and the parking brake will allow the mower to move. If the
following procedures do not allow you to engage the parking
brake properly, contact your Scag dealer for further brake
adjustments.
390S0152-1
1. Position a floor jack under the rear of the machine.
Raise the machine and support it to prevent it
from falling. Block the caster wheels to prevent the
machine from moving. Remove the drive wheels.
2" to 2-1/4" Clearance
Figure 6-1. Brake Adjustment
2. With the brake lever in the disengaged position,
check the distance between the top of the frame
tube and the bottom of the brake handle. The
distance should be 2" to 2-1/4". See Figure 6-1.
3. If the distance is not at the specified measurement,
adjust by loosening the jam nuts at both ends of the
brake control rod and turning the rod until the proper
distance is achieved. Tighten the jam nuts. See
Figure 6-1.
LOOSEN
HERE
4. With the brake in the engaged position, check
the distance between the lower nut on the brake
actuator rod and the brake actuator lever on the LH
side of the machine. The distance should be 1/8".
See Figure 6-2.
1/8"
390S0153-1
Figure 6-2. Brake Rod Adjustment
5. If the distance is not at the specified measurement,
loosen the jam nut at the clevis on the top of the
brake actuator rod. See Figure 6-2.
6. Turn the bolt at the bottom of the brake actuator lever
until the 1/8" measurement is achieved and tighten
the jam nut at the clevis on the brake actuator rod.
See Figure 6-2.
7. Repeat steps 4 though 6 on the RH side of the
machine.
8. Replace the drive wheels and test the brake.
24
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Section 6
6.2 TRAvEL ADJUSTMENTS
LOOSEN HERE
Neutral or tracking adjustments will need to be made if:
A. The steering control levers are in the neutral position
and the machine creeps forward or backward. See
Neutral Adjustment on page 25 (next procedure).
B. The steering control levers are in the full forward
position and the mower pulls to one side or the other
when traveling in a forward direction. See Tracking
Adjustment on page 26.
ADJUST HERE
STT99RHCRA
NEUTRAL ADJUSTMENT
Figure 6-3. RH Steering Control Rod Adjustment
1. Be sure the dump valve levers are in the run position
and the steering control levers are in the neutral lock
position.
5. Tighten the jam nuts and repeat for the LH wheel.
See Figure 6-4.
2. With an operator in the seat, start the engine and
disengage the parking brake.
3. Run the engine at full operating speed and check if
the machine creeps forward or backwards.
4. Adjust the RH wheel by loosening the jam nuts on
the steering control rod and turning the rod until the
drive wheel turns in the forward direction. Turn the
rod back until the drive wheel stops moving. Turn the
rod an additional 1/2 turn. See Figure 6-3.
LOOSEN
HERE
CONTROL
ROD
390S0147-1
LOOSEN
HERE
LOOSEN HERE
390S0149-1
ADJUST HERE
390S0146
Figure 6-4. LH Steering Control Rod Adjustment
25
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Section 6
6. Actuate the steering control levers forward and
reverse several times and return them to the neutral
position.
- NOTe -
If after making the adjustment as outlined in step
1A, the machine creeps forward or backward,
perform the neutral adjustment. See Neutral
Adjustment on page 25.
7. Check that the drive wheels remained in neutral and
readjust if necessary.
8. Check that the steering control levers hit the stop
before the pumps reach full stroke. Adjust as
needed.
2. If at full speed the mower pulls left, it is an indication
that the right wheel is turning faster than the left
wheel. To adjust this condition, proceed as follows:
TRACKING ADJUSTMENT
A. Stop the machine and place the steering control
levers in the neutral position. Loosen the lock nuts
securing the ball joints at each end of the RH steering
control rod. Rotate the control rod to lengthen the rod
and tighten the lock nuts. This will cause the control
rod to stroke the RH pump less, slowing down the RH
wheel. See Figure 6-3.
CAUTION
Stop the engine and remove the key from the
ignition before making any adjustments. Wait
for all moving parts to come to a complete stop
before beginning work.
- NOTe -
If after making the adjustment as outlined in step
2A, the machine creeps forward or backward,
perform the neutral adjustment. See Neutral
Adjustment on page 25.
CAUTION
The engine and drive unit can get hot during
operation causing burn injuries. Allow engine
and drive components to cool before making any
adjustments.
6.3 THROTTLE CONTROL AND CHOKE
ADJUSTMENTS
These adjustments must be performed by your Scag dealer
to ensure proper and efficient running of the engine.Should
either need adjustment, contact your authorized Scag
service center.
- NOTe -
6.4 BELT ADJUSTMENT
Before proceeding with this adjustment, be sure
that the caster wheels turn plus pivot freely and
that the tire pressure in the drive wheels is correct.
If the tire pressure is not correct, the machine will
pull to the side with the lower pressure.
WARNING
Before removing any guards, shut the engine off
and remove the ignition key.
1. If at full speed the mower pulls right, it is an
indication that the left wheel is turning faster than
the right wheel. To adjust this condition, proceed as
follows:
All drive belts are spring loaded and self-tensioning,
however after the first 2, 4, 8 and 10 hours of operation,
the belts should be checked for proper alignment and wear.
Thereafter, check the belts after every 40 hours of operation
or weekly, whichever occurs first.
A. Stop the machine and place the steering control
levers in the neutral position. Loosen the lock nuts
securing the ball joints at each end of the LH steering
control rod. Rotate the control rod to lengthen the rod
and tighten the lock nuts. This will cause the control
rod to stroke the LH pump less, slowing down the LH
wheel. See Figure 6-4.
26
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Section 6
2. Loosen the two (2) elastic stop nuts. Adjust the bolt
up or down on the adjustment bracket to adjust
the cutter deck until the distance from the bottom
of the cutter deck to the floor is the same as the
measurement on the RH side of the machine.
6.5 BELT ALIGNMENT
Belt alignment is important for proper performance of
your Scag mower. If you experience frequent belt wear
or breakage, see your authorized Scag service center for
belt adjustment.
3. Tighten the two (2) elastic stop nuts to secure the
cutter deck in the proper position.
6.6 CUTTER DECK ADJUSTMENTS
CUTTER DECK PITCH
Cutter deck level, pitch and height are set at the factory.
However, if these adjustments should ever need to be
made, the following procedures will aid in obtaining the
proper cutter deck adjustment.
The pitch of the cutter deck should be equal between
the front and rear of the cutter deck for proper cutting
performance. To check for proper deck pitch, be sure
that the mower is on a flat, level surface and the tires are
properly inflated.
- NOTe -
Beforeproceedingwiththecutterdeckadjustments,
be sure that all tires are properly inflated.
Check the distance from the top of the cutter deck to the
floor at the rear RH side of the cutter deck directly behind
the cutter deck hanging chains. Next check the distance
from the top of the cutter deck to the floor at the front RH
side of the cutter deck directly in front of the cutter deck
hanging chains.The measurement at the front of the cutter
deck should be the same as the rear of the deck. Make
these measurements at the LH side of the cutter deck also.
If the measurement at the front of the deck is not the same,
the cutter deck pitch must be adjusted as follows:
CUTTER DECK LEvEL
The cutter deck should be level from side-to-side for
proper cutting performance. To check for level, be sure
that the mower is on a flat, level surface, the tires are
properly inflated and the cutter deck is set at the most
common cutting height that you will use. On the RH side
of the machine, check the distance from the top of the
cutter deck to the floor. Next check the distance from the
top of the cutter deck to the floor on the LH side of the
machine. Both measurements should be the same. If the
two measurements are different, the cutter deck level must
be adjusted as follows:
1. Loosen the jam nut on both adjusting rods. See
Figure 6-6.
JAM NUT
ADJUST HERE
1. On the front LH side of the cutter deck locate the
cutter deck level adjusting bracket. See Figure 6-5.
ADJUST
HERE
390S0174-1
LOOSEN
HERE
Figure 6-6. Cutter Deck Level Adjustment
2. Using a wrench on the jam nut turn the adjusting
rods until the proper pitch is obtained on both the RH
and the LH side of the cutter deck. Tighten both jam
nuts. See Figure 6-6.
Figure 6-5. Cutter Deck Level Adjustment
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Section 6
- NOTe -
To prevent the cutter deck from teetering, all four
(4) cutter deck hanging chains must have tension
on them. If all four chains do not have tension on
them and the deck teeters, you must readjust the
cutter deck as outlined in the procedures above.
All measurements should be taken from the top
edge of the deck as the Velocity Plus decks have
an uneven bottom edge.
DECK
STOP
1/4"
CUTTER DECK HEIGHT
390S0175-1
The cutter deck height adjustment is made to ensure that
the cutter deck is cutting at the height indicated on the
cutting height index gauge.To check for proper deck height,
be sure that the mower is on a flat, level surface and the
tires are properly inflated.
Figure 6-8. Cutter Deck Stop
3. Check the cutter deck cutting height by placing the
lanyard pin in the 3" position on the cutting height
index. Release the deck from the transport position
and allow the deck to move to the 3" cutting height
position.
1. Place the cutter deck in the transport position.
Loosen the jam nuts on both ends of the deck height
control rod. See Figure 6-7.
4. Check the measurement from the floor to the
cutter blade tip. If the measurement is not at 3",
an adjustment can be made using the deck height
control rod. See Figure 6-7.
LANYARD
LOOSEN HERE
PIN
3
1 5 4
8
4
1
1 . 5
2
2 . 5
3
3 . 5
4
4 . 5
5
5 . 5
6
H E I G H T
C U T T I N G
- NOTe -
If an adjustment had to be made, be sure that the
cutter deck can easily be locked into the transport
position.
6.7 CUSTOM-CUT BAFFLE ADJUSTMENT
The Custom-Cut Baffle is designed to deliver optimum
airflow and superior cutting performance in any type of
grass. The Custom-Cut Baffle can be raised or lowered to
precisely tailor the deck's performance for the type of grass
being cut.The baffle can be set in three (3) (early models),
or seven (7) (current production) different positions for
optimum performance.
390S014A-2
HEIGHT ADJUSTMENT PEDAL
Figure 6-7. Cutter Deck Height Adjustment
2. Turn the control rod (See Figure 6-7) until there is a
1/4" space between the rear deck stop and the top of
the cutter deck. See Figure 6-8. Tighten the jam nuts
on the control rod.
3-POSITION CUSTOM-CUT BAFFLE
ADJUSTMENT - EARLY MODELS
A. 3" Position - (See Figure 6-9). Baffle is installed
using the top set of holes on the front baffle welded
inside the cutter deck. In this position theVelocity-Plus
cutter deck will deliver the best quality-of-cut in very
tall, wiry, tough to cut grass.
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Section 6
B. 3-1/2" Position - (See Figure 6-9).Baffle is installed
- NOTe -
using the middle set of holes on the front baffle welded
inside the cutter deck.Can be used for general purpose
cutting. Placing the Custom-Cut Baffle in the 3-1/2"
position gives a good mix of cutting performance in all
types of grass.
Hardware location used in the illustrations are for
reference only. Location of hardware may vary
depending on cutter deck size.
3. Move the Custom-Cut Baffle to desired position. See
Figure 6-10.
C. 4" Position (factory setting) - (See Figure 6-9).Baffle
is installed using the bottom set of holes on the front
baffle welded inside the cutter deck. Placing the baffle
in the 4" setting will enhance fall cutting (leaf pickup)
and reduce cutter deck "blowout".
4. Reinstall the mounting hardware. Torque hardware to
39 lb-ft.
To adjust the Custom-Cut Baffle height:
1. Place the cutter deck in the transport position.
2. Remove the hardware securing the Custom-Cut
Baffle to the cutter deck. See Figure 6-9.
- NOTe -
Hardware location used in the illustrations are for
reference only. Location of hardware may vary
depending on cutter deck size.
3. Move the Custom-Cut Baffle to desired position. See
Figure 6-9.
4. Reinstall the mounting hardware as shown. Torque
hardware to 39 lb-ft.
7-POSITION CUSTOM-CUT BAFFLE
ADJUSTMENT - CURRENT PRODUCTION
A. 3-1/2" or 3-3/4" Position - (See Figure 6-10). For
very tall, wiry or tough-to-cut grass.
B. 4" (factory setting), 4-1/4" or 4-1/2" Position - (See
Figure 6-10). For general purpose cutting. This gives
the best mix of cutting performance in all types of
grass.
C. 4-3/4" or 5-1/4" Position - (See Figure 6-10).
Placing the baffle in either the 4-3/4" or 5-1/4" setting
will enhance fall cutting (leaf pickup) and reduce cutter
deck "blowout".
To adjust the Custom-Cut Baffle height:
1. Place the cutter deck in the transport position.
2. Remove the hardware securing the Custom-Cut
Baffle to the cutter deck.
29
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Section 6
1
2
3
1
3
2
A
A
Custom-Cut Baffle Adjustment
Mounting Slot
Mounting Hardware Location
Slot “A”
Height (inches)
Hole 1
3”
Hole 2
3-1/2”
Hole 3
4”
Figure 6-9. 3-Position Custom-Cut Baffle Adjustment
1
3
2
4
A
B
1
2
3
4
A
B
Custom-Cut Baffle Adjustment
Mounting Slot Selected
Mounting Hardware Location
Slot “A”
Height (inches)
Hole 1
3-3/4”
Hole 2
4-1/4”
Hole 3
4-3/4”
Hole 4
5-1/4”
Slot “B”
Height (inches)
Hole 2
3-1/2”
Hole 3
4”
Hole 4
4-1/2”
Figure 6-10. 7-Position Custom-Cut Baffle Adjustment
30
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Section 6
6.8 ELECTRIC CLUTCH ADJUSTMENT
ADJUSTMENT NUTS
The electric clutch serves two functions in the operation of
the mower. In addition to starting and stopping the power
flow to the cutter blades, the clutch also acts as a brake to
assist in stopping blade rotation when the PTO is switched
off or the operator presence circuit is interrupted.
When the clutch is disengaged, the air gap between the
armature and rotor must be adjusted to fifteen thousandths
of an inch, 0.015, for proper operation. The airgap
adjustment is made at three bolts on the clutch.There are
three inspection windows, one next to each adjusting bolt.
See Figure 6-3.
INSPECTION WINDOW (x3)
ADJUSTMENT NUTS
Figure 6-1. Clutch Air Gap Adjustment
Figure 6-1. Clutch Air Gap Adjustment
This adjustment should be done every 500 hours of
operation or annually, whichever comes first. In cases
where the machine is heavily used, airgap settings should
be checked more often.
1. Locate the inspection windows on the clutch.
2. Place a 0.015 feeler gauge in the slot between the
rotor and the armature.
If the air gap is too narrow, the clutch armature may drag
when disengaged, resulting in premature failure.
3. Tighten or loosen the adjusting bolt as needed to
acheive the 0.015 inch airgap. See Figure 6-4.
Perform this operation at all three inspection
windows.
If the air gap is too wide, the clutch may be slow to engage
as the magnet must pull the armature in from a greater
distance.
31
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Section 7
MAINTENANCE
7.1 MAINTENANCE CHART - RECOMMENDED SERvICE INTERvALS
HOURS
PROCEDURE
BREAK-IN
(FIRST 10)
COMMENTS
8
40
100 200 500
Check all hardware for tightness
Check hydraulic oil level
X
See paragraph 7.3
X
X
Check all belts for proper See paragraph 7.8
alignment
Change engine oil and filter
See paragraph 7.4
X
X
Check coolant level
See paragraph 7.11
Check hydraulic hoses for leaks
Use extreme caution when
checking the hydraulic hoses.
See paragraph 2.6
X
Check engine oil level
*Clean mower
See paragraph 7.4
See paragraph 7.12
See paragraph 7.9
See paragraph 7.2
See paragraph 7.10
X
X
X
X
X
Check condition of blades
Apply grease to fittings
Check tire pressure
Inspect seat belt for wear or See paragraph 2.5
damage
X
Check the operator interlock See paragraph 4.2
system
X
X
Check coolant level
See paragraph 7.11
Check battery electrolyte level See paragraph 7.7
clean battery posts and cables
X
X
Check belts for proper alignment
See paragraph 7.8
Apply grease to fittings
Change engine oil
See paragraph 7.2
See paragraph 7.4
See paragraph 7.6
X
X
X
*Clean air cleaner element
Check lubricant in cutter deck See paragraph 7.11
gearbox
X
* Perform these maintenance procedures more frequently under extreme dusty or dirty conditions
32
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Section 7
MAINTENANCE CHART - RECOMMENDED SERvICE INTERvALS (CONT'D)
HOURS
PROCEDURE
BREAK-IN
(FIRST 10)
COMMENTS
8
40
100 200 500
Apply grease to fittings
Check hardware for tightness
Change engine oil filter
Check hydraulic oil level
Replace engine fuel filter
See paragraph 7.2
X
X
X
X
X
See paragraph 7.4
See paragraph 7.3
See paragraph 7.5
Drain hydraulic system and replace Use SAE 20W50 Motor Oil.
X
X
X
X
hydraulic oil
See paragraph 7.3
Replace hydraulic oil filter
See paragraph 7.3
Replace cutter deck gearbox See paragraph 7.11
lubricant
Change coolant
See paragraph 7.11
7.2 LUBRICATION
GREASE FITTING LUBRICATION CHART (SEE FIGURE 7-1)
NO. OF
PLACES
LOCATION
LUBRICATION INTERvAL
LUBRICANT
Chassis Grease
1 Caster Wheel Pivot *
2 Caster Wheel Bearings
3 Brake Actuator
500 Hours/Yearly
100 Hours/Monthly
200 Hours/Monthly
100 Hours/Bi-Weekly
100 Hours/Bi-Weekly
40 Hours/Weekly
40 Hours/Weekly
200 Hours/Monthly
200 Hours/Monthly
2
2
2
4
2
1
3
1
2
1
Chassis Grease
Chassis Grease
Chassis Grease
Chassis Grease
4 Cutter Deck Bellcranks
5 Cutter Deck Pusharms
6 PTO Spindle
+Lithium MP White Grease 2125
+Lithium MP White Grease 2125
Chassis Grease
7 Cutter Deck Spindle
8 Brake Handle
9 Cutter Deck Drive Shaft U-Joints
Chassis Grease
10 Cutter Deck Drive Shaft Slip Sleeve 40 Hours/Weekly
Chassis Grease
+ Compatible Greases:
Mobilix #2 found at Mobil Service Stations
Ronex MP found at Exxon Service Stations
Super Lube MEP #2 & Super Stay-M #2 found at Conoco Stations
Shell Alvania #2 found at Shell Service Stations
Lidok EP #2 found at industrial shops
Timken Lithium Multi-Use #2 found at industrial shops
* PROCEDURE: Remove grease cap, part number 481559. Remove plug, part number 482028-01, and install grease
zerk. Apply grease to the fitting until new grease appears at the top of the caster extension. Remove the grease
zerk and reinstall the plug. Reinstall the grease cap. Special tool, part number 47007, is recommended for use in the
installation of the grease cap.
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Section 7
GREASE FITTING LUBRICATION
LUBRICANT / INTERVAL
LITHIUM MP WHITE GREASE 2125
( 40 HOURS / WEEKLY )
CHASSIS GREASE
( 100 HOURS / BI-MONTHLY )
CHASSIS GREASE
( 200 HOURS / MONTHLY )
CHASSIS GREASE
( 500 HOURS / YEARLY )
4
1
7
3
2
6
5
8
1
4
3
9
2
9
5
390S0145-1
Figure 7-1. Lubrication Fitting Points
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Section 7
- IMPORTANT -
7.3 HYDRAULIC SYSTEM
The hydraulic oil should be changed if you notice
the presence of water or a rancid odor to the
hydraulic oil.
A. CHECKING HYDRAULIC OIL LEvEL
The hydraulic oil level should be checked after the first 10
hours of operation. Thereafter, check the oil after every
200 hours of machine operation or monthly, whichever
occurs first.
1. Park the mower on a level surface and stop the
engine.
2. Place a suitable container under the hydraulic oil
filter. Remove the fill cap from the reservoir and the
drain plug from the bottom of the drain tee fitting on
- IMPORTANT -
the filter base. See Figure 7-3. Allow the fluid to drain
into the container and properly discard it.
If the oil level is consistently low, check for leaks
and correct immediately.
1. Wipe dirt and contaminants from around the
reservoir cap. Remove the cap from the hydraulic oil
reservoir.
2. Visually check the level of hydraulic oil. Hydraulic
oil must be at least 3" inches from top of the filler
neck. If the level cannot be determined visually,
use a clean tape measure to check the level. If the
fluid is low, add 20W50 motor oil. DO NOT overfill;
(overfilling the oil reservoir may cause oil seepage
around the cap area).
HYDRAULIC
OIL FILTER
3. Clean the fill cap and install it onto the reservoir.
390S0155-1
Figure 7-3. Hydraulic Oil Filter
3. Re-install the drain plug into the tee fitting and be
sure it is tight.
- NOTe -
Before refilling the hydraulic oil reservoir the
hydraulic oil filter should be changed as outlined
in Procedure C "Changing Hydraulic Oil Filter
Element" on page 35.
Hydraulic Oil
Reservoir
4. Fill the reservoir to 3-1/4" inches from the top of the
filler neck with 20W50 motor oil.
STT99HOR-1
5. Replace the reservoir fill cap. Start the engine and
drive forward and backward for two minutes. Check
the oil level in the reservoir. If necessary, add oil to
the reservoir.
Figure 7-2. Hydraulic Oil Reservoir
B. CHANGING HYDRAULIC OIL
The hydraulic oil should be changed after every 500 hours
or annually, whichever occurs first. The oil should also
be changed if the color of the fluid has become black or
milky. A black color and/or a rancid odor usually indicates
possible overheating of the oil, and a milky color usually
indicates water in the hydraulic oil.
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Section 7
ENGINE OIL FILTER
C. CHANGING HYDRAULIC OIL FILTER
ELEMENT
The hydraulic oil filter should be changed after every 500
hours of operation or annually, whichever occurs first.
1. Remove the oil filter element and properly discard it.
See Figure 7-3. Fill the new filter with clean oil and
install the filter. Hand tighten only.
2. Run the engine at idle speed with the speed control
lever in neutral for five minutes.
DRAIN
PLUG
3. Check the oil level in the hydraulic tank. It must
be 3-1/4" inches from the top of the filler neck. If
necessary, add SAE 20W50 motor oil.
STT99CEC
Figure 7-5. Drain Plug and Oil Filter Location
7.4 ENGINE OIL
C. CHANGING ENGINE OIL FILTER
ENGINE OIL
DIPSTICK
After the first 20 hours of operation, replace the engine
oil filter. Thereafter, replace the oil filter after every 200
hours of operation or every month, whichever occurs first.
Refer to Engine Operator’s Manual for instructions. See
Figure 7-5.
7.5 ENGINE FUEL SYSTEM
DANGER
To avoid injury from burns, allow the mower
to cool before removing the fuel tank cap and
refueling.
390S0156
Figure 7-4. engine Oil Fill/Dipstick Location
A. CHECKING ENGINE CRANKCASE OIL LEvEL
A. FILLING THE FUEL TANK
The engine oil level should be checked after every 8 hours
of operation or daily as instructed in the Engine Operator’s
Manual furnished with this mower.
Fill the fuel tank at the beginning of each operating day
to within one (1) inch below the filler neck. Do not overfill.
Use clean, fresh unleaded gasoline with a minimum
octane rating of 87 and a maximum of 10% Ethanol.
B. CHANGING ENGINE CRANKCASE OIL
After the first 20 hours of operation, change the engine
crankcase oil and replace the oil filter. Thereafter,
change the engine crankcase oil after every 100 hours of
operation or bi-weekly, whichever occurs first. Refer to the
Engine Operator’s Manual furnished with this mower for
instructions. See Figure 7-5.
DO NOT use E85 Fuel. Using E85 Fuel will cause severe
damage to the engine.
To avoid personal injury or property damage, use
extreme care in handling gasoline. Gasoline is extremely
flammable and the vapors are explosive.
36
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Section 7
1. Extinguish all cigarettes, cigars, pipes and other
sources of ignition.
2. Use only an approved gasoline container.
3. Never remove the gas cap or add fuel with the
engine running. Allow the engine to completely cool
before fueling.
4. Never fuel the machine indoors or in an enclosed
trailer.
5. Never store the machine or fuel container where
there is an open flame, spark or pilot light such as on
a water heater or other appliances.
Fuel Filter
(with hose clamps
above and below)
6. Never fill containers inside a vehicle or on a truck
or trailer bed with a plastic liner. Always place
containers on the ground away from your vehicle
before filling.
STT99FF-1
Figure 7-6. Fuel Filter
7. Remove the machine from the truck or trailer and
fuel on the ground. If this is not possible, then refuel
the machine with a portable container, rather than
from a gasoline dispenser nozzle.
7.6 ENGINE AIR CLEANER
A. CLEANING AND/OR REPLACING AIR
CLEANER ELEMENT
8. Keep the nozzle in contact with the rim of fuel tank
or container opening at all times until fueling is
complete. Do not use a nozzle lock-open device.
For any air cleaner, the operating environment dictates
the air cleaner service periods. Inspect and clean the air
cleaner element after every 100 hours of operation or
bi-weekly, whichever occurs first and replace the element
if required. See Engine Owner's Manual for service
information.
9. If fuel is spilled on clothing, change clothing
immediately and wash affected skin.
10. Replace gas cap and tighten securely.
B. REPLACING IN-LINE FUEL FILTER
ELEMENTS
- NOTe -
In extremely dusty conditions it may be necessary
to check the element once or twice daily to prevent
engine damage.
The engine fuel filter should be replaced after every 500
hours of operation or annually, whichever occurs first. See
Figure 7-6.
1. Unhook the clamps securing the air cleaner cover to
the air filter canister. Remove the air cleaner cover
and set aside.
1. Close the shut-off valve.
2. Remove the two clamps securing the fuel filter to the
fuel hose. Remove the fuel filter.
2. Remove the air cleaner and inspect.
3. Install a new fuel filter. Be sure it is installed in the
proper direction. Secure to the fuel hose using the
two clamps.
3. Clean or replace the air cleaner and foam
pre-cleaner as recommended by the engine
manufacturer.
4. Open the fuel shut-off valve.
4. Replace the air cleaner cover and be sure to snap
the latches closed.
37
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Section 7
A. CHARGING THE BATTERY
7.7 BATTERY
Refer to the battery charger’s manual for specific
instructions.
WARNING
Under normal conditions the engine’s alternator will have
no problem keeping a charge on the battery. If the battery
has been completely discharged for a long period of time,
the alternator may not be able to recharge the battery,
and a battery charger will be required.
Lead-acid batteries produce flammable and
explosive gases. To avoid personal injury when
checking, testing or charging batteries, DO NOT
use smoking materials near batteries. Keep arcs,
sparks and flames away from batteries. Provide
proper ventilation and wear safety glasses.
DO NOT charge a frozen battery. It may explode and
cause injury. Let the battery warm before attaching a
charger.
Whenever possible, remove the battery from the mower
before charging and make sure the electrolyte covers the
plates in all cells.
WARNING
Battery posts, terminals, and related accessories
contain lead and lead compounds, chemicals
known to cause cancer and reproductive harm.
Wash hands after handling.
WARNING
BATTERIES PRODUCE ExPLOSIvE GASES.
Charge the battery in a well ventilated space so
gases produced while charging can dissipate.
WARNING
Charging rates between 3 and 50 amperes are satisfactory
if excessive gassing or spewing of electrolyte does not
occur or the battery does not feel excessively hot (over
125°F). If spewing or gassing occurs or the temperature
exceeds 125°F, the charging rate must be reduced or
temporarily stopped to permit cooling.
Electric storage battery fluid contains sulfuric
acid which is POISON and can cause SEvERE
CHEMICAL BURNS. Avoid contact of fluid with
eyes, skin, or clothing. Use proper protective gear
when handling batteries. DO NOT tip any battery
beyond 45° angle in any direction. If fluid contact
does occur, follow first aid suggestions below.
B. JUMP STARTING
1. The booster battery must be a 12 volt type. If a
vehicle is used for jump starting, it must have a
negative ground system.
BATTERY ELECTROLYTE FIRST AID
External Contact — Flush with water.
2. When connecting the jumper cables, connect the
positive cable to the positive battery post, then
connect the negative cable to the negative battery
post.
Eyes — Flush with water for at least 15 minutes
and get medical attention immediately.
Internal — Drink large quantities of water. Follow
with Milk Of Magnesia, beaten egg, or vegetable
oil. Get medical attention immediately. In case of
internal contact, DO NOT give fluids that would
induce vomiting.
38
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Section 7
B. BLADE SHARPENING
7.8 DRIvE BELTS
All drive belts are spring-loaded and self-tensioning,
however after the first 2, 4, 8 and 10 hours of operation,
the belts should be checked for proper alignment and
wear. Thereafter, check the belts after every 40 hours of
operation or weekly, whichever occurs first.
- NOTe -
If possible, use a file to sharpen the blade. Using
a wheel grinder may burn the blade.
- NOTe -
- NOTe -
DO NOT sharpen the blades beyond 1/3 of the
width of the blade. See Figure 7-7.
If you experience frequent belt wear or breakage,
see your authorized Scag service center for belt
adjustment.
1. Sharpen the cutting edge at the same bevel as the
original. See Figure 7-7. Sharpen only the top of the
cutting edge to maintain sharpness.
7.9 CUTTER BLADES
Angle Blade Back
A. BLADE INSPECTION
Do Not Cut In
1. Remove the ignition key before servicing the blades.
2. Raise the mower deck to the highest position. Place
the lanyard pin in the highest cutting height position
to prevent the cutter deck from falling.
x
X Must NOT Exceed
1/3 Blade Width
30
SGB033
Figure 7-7. Blade Sharpening
WARNING
Always wear proper hand and eye protection when
2. Check the balance of the blade. If the blades are out
of balance, vibration and premature wear can occur.
See your authorized Scag dealer for blade balancing
or special tools, if you choose to balance your own
blades.
working with cutter blades.
3. Check the cutter blades for straightness. If the cutter
blades appear bent, they will need to be replaced.
C. BLADE REPLACEMENT
WARNING
Do not attempt to straighten a bent blade, and
never weld a broken or cracked blade. Always
replace it with a new blade to assure safety.
WARNING
Always wear proper hand and eye protection when
working with cutter blades.
4. If a blade cutting edge is dull or nicked, it should be
sharpened. Remove the blades for sharpening. See
"Blade Replacement."
1. Remove the ignition key before replacing the blades.
2. Raise the mower deck to the highest position. Place
the lanyard pin in the highest cutting height position
to prevent the cutter deck from falling.
- NOTe -
3. Secure the cutter blades to prevent them from
rotating, (use the optional Blade Buddy tool P/N
Keep the 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 the blade drive by pulling hard.
9212, to assist in securing the cutter blades), remove
the nut from the blade attaching bolt. Remove the
cutter blade, bolt and spacer from the spindle shaft.
See Figure 7-8.
39
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Section 7
- NOTe -
7.10 TIRES
The front of the machine will have to be raised
slightly to remove the blade bolt from the cutter
spindle.
Check the tire pressures after every 8 hours of operation
or daily.
Caster Wheels
Drive Wheels
Flat Free
12 PSI
4. To install the new cutter blade, put the flat washer
onto the blade bolt and slide the bolt into the hole in
the cutter blade.
7.11 CUTTER DECK GEARBOx
A. CHECKING LUBRICANT LEvEL
HEX NUT-TORQUE
TO 75 LB-FT
CAUTION
SPINDLE
The cutter deck gearbox can reach high operating
temperatures. Allow the cutter deck gearbox to
cool before servicing.
SHAFT
CUTTER
DECK
The fluid level in the cutter deck gearbox should be
checked after every 100 hours of operation or bi-weekly,
whichever occurs first.
HEX HEAD
BOLT / NUT
SPINDLE
ASSEMBLY
1. Lower the cutter deck to to its lowest position to gain
access to the cutter deck gearbox.
CUTTER BLADE
SPACER
2. Clean and remove the check plug from the side of
the gearbox. See Figure 7-9.
CUTTER
BLADE
WASHER
HEX HEAD BOLT
Figure 7-8. Blade Replacement
- NOTe -
Be sure that the blade is installed with the lift wing
toward the top.
5. Install the spacer onto the blade bolt and insert the
bolt into the cutter spindle shaft.
CUTTER DECK
GEARBOX
CHECK
PLUG
6. Install the hex nut to the blade bolt at the top of the
cutter spindle. Secure the blades from rotating and
torque to 75 lb-ft. See Figure 7-8.
390S0161
Figure 7-9. Cutter Deck Gearbox
3. Visually check that the lubricant level is up to the
bottom edge of the check plug hole. If lubricant is
low, add SAE 80W90 lubricant through the check
plug hole in the gearbox until it is level with the
bottom of the check plug hole. Install the check plug
and tighten securely.
40
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Section 7
B. CHANGING LUBRICANT
Fill to Bottom of
Filler Neck
The lubricant in the cutter deck gearbox should be
changed after every 500 hours of operation or yearly,
whichever occurs first.
1. Place a suitable container beneath the cutter deck
gearbox and locate the gearbox drain plug.
2. Remove the drain plug, drain the lubricant into the
container and properly discard it.
030467-13
3. Re-install the drain plug and add SAE 80W90
lubricant through the check plug hole in the gearbox
until it is level with the bottom of the check plug hole.
Install the check plug and tighten securely.
Figure 7-10. Coolant Level
3. Replace the radiator cap. Push down on the cap and
turn clockwise until it stops.
7.12 COOLING SYSTEM
- NOTe -
(LIqUID-COOLED MACHINES ONLY)
The cooling system should be flushed and the
coolant replaced every 500 hours of operation or
annually. See your Scag dealer for proper coolant
replacement.
WARNING
To avoid burns, always allow the engine to cool
before removing the radiator cap.
B. CLEANING THE RADIATOR DEBRIS SCREEN
After each day of operation, remove and clean the radiator
debris screen.
A. CHECKING COOLANT LEvEL
The coolant level should be checked before each day of
operation.
CAUTION
To avoid personal injury, always wear safety
glasses when using compressed air.
1. Remove the radiator cap by turning it slowly
counterclockwise to the first stop and allow any
pressure to be released. Push down on the cap and
turn counterclockwise to remove.
1. Pull the debris screen up to remove.
2. Visually check the coolant level. The coolant level
should be up to the bottom of the filler neck as
shown in Figure 7-10. Add a mixture of coolant and
soft water as needed.
2. Clean the debris screen with compressed air or a
water hose.
- NOTe -
- NOTe -
Check the radiator for excessive debris and clean
with compressed air. Never spray a hot engine
with water, use only compressed air to remove
debris.
Refer to the coolant manufacturer's instructions for
the proper coolant mixture ratio.
3. Re-install the debris screen to the radiator.
41
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Section 7
C. CHECKING THE FAN BELT TENSION (LIqUID-
COOLED ENGINES ONLY)
Periodically check the fan belt tension. The belt should
deflect 1/2" with 10 pounds of pressure. See your Scag
dealer if the belt is in need of adjustment or replacement.
7.13 BODY, DECK, AND UPHOLSTERY
CAUTION
Do not wash any portion of the equipment while it
is hot. Do not wash the engine; use compressed
air.
1. After each use, wash the mower and cutter deck.
Use cold water and automotive cleaners. Do not use
pressure cleaners.
2. Do not spray electrical components.
3. Use a mild soap solution or a vinyl/rubber cleaner to
clean the seat.
4. Repair damaged metal surfaces using Scag touch-
up paint available from your authorized Scag dealer.
Wax the mower for maximum paint protection.
42
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Section 8
ILLUSTRATED PARTS LIST
8.1 SCAG APPROvED ATTACHMENTS AND ACCESSORIES
Attachments and accessories manufactured by companies other than Scag Power Equipment are not
approved for use on this machine.
Scag approved attachments and accessories:
• GC-STT (p/n 9059, 9060, 9039)
• GC-STT-CS (p/n 9063, 9064, 9041)
• Mulch Plate (p/n 9287, 9288, 9262)
• Hurricane Mulch (p/n 9284, 9285, 9267)
• STT Hitch (p/n 9242)
• STT Bumper (p/n 9256)
• Suspension Seat w/Seat Belt (p/n 9292)
• STT Lights (p/n 9279)
• Tiger Striper (p/n 9269)
• Blade Buddy (p/n 9212)
43
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Section 8
52v CUTTER DECK
24
60
14
29
28
20
53
58
24
67
52
69
64
24
14
44 61 63
52
24
14
50
56
29
11
4
46
A
18
28
52
65
23
29
21
58
49
58
B
56
55
A
33
3
66
15
51
59
23
13
17
54
83
12
32
13
28
31
55
12
85
86
84
72
68
82
3
3
26
12
31
23
77
B
27
6
8
35
36
13
26
57
2
30
7
76
10
23
37
75
78
1
45
44
38
39
81
5
79
80
47
51
25
22A
12
13
19
22
22A
70
71
40
42
62
37
48
34
74
41
43
28
73
9
29
16
STT 2008 CD
44
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Section 8
52v CUTTER DECK
Ref.
Ref.
Part No.
No.
Description
Part No.
No.
Description
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
483378
482295
482878
482486
482281
45944
48926
48141
461842
48224
483215
461929
482744
424798
422412
461516
43590
Spring, Discharge Chute
Wheel, Anti-Scalp
Cutter Blade, 18”
Gearbox Assm, Deck Drive
Belt, Cutter Deck Drive
Roller Shaft
Tapered Hub, 1-1/8” Bore
Tapered Hub, 1” Bore
Idler Arm, Cutter Deck
Bearings, Ball
1
2
3
4
5
6
7
8
461859
Cutter Deck Velocity Plus
Bolt, Carriage 7/16-14 x 1-1/4”
Nut, Hex Serr. Flng 3/8-16
Wing nut, 3/8-16
04003-40
04019-04
481625-01
481632
04003-26
422478
04017-27
04043-06
04021-05
461845
04001-11
04001-12
04021-22
04020-09
451240
04001-41
04003-12
04001-108
04063-08
04063-01
04043-04
04001-176
04019-03
04001-172
48100-15
04030-03
04040-15
04041-07
04021-09
04001-62
04001-54
04001-20
04001-136
461663
Anti-Scalp Wheel
Bolt, Carriage 3/8-16 x 4”
Anti-Scalp Wheel Bracket
Bolt, Hex Serr. Flng 3/8-16 x 1”
Flatwasher, 5/8” Hardened
Locknut, 3/8-16 Center Lock
Discharge Chute
Bolt, Hex Head 5/16-18 x 1-3/4” - Front
Bolt, Hex Head 5/16-18 x 1-1/2” - Rear
Nut, Hex Elastic Stop 5/16-18 Grd 8
Nut, 5/8-11 UNC
9
10
11
12
Pulley, Idler
Lever Assembly, Deck Level (Incl. 77)
Pulley, 5.75” O.D. (52”)
Mounting Plate, RH Gearbox
Belt, Cover
Pusharm (includes items 44, 63 & 64)
Spacer, Spindle Bottom
Nut, Hex Head 5/8-18 UNF
Rod End, 5/8” Male RH Thrd
Bolt, Hex Head 5/8-11 x 4-1/2”
Spring, Cutter Deck
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
Push Arm Shaft
Bolt, HH 5/8-11 x 9-1/2”
Bolt, Carriage 5/16-18 x 3/4”
Bolt, HH 5/16-18 x 4-1/2”
Key, 1/4 x 1/4 x 2”
04020-16
48763
04001-79
483704
482747
04110-03
04021-13
424208
43503
424840
04003-23
04040-11
04021-11
483167
04003-12
04040-04
04021-04
483176
48038
Key, 1/4 x 1/4 x 1-1/4”
Pulley, 6.95” O.D.
U-Nut, 3/8-16
Flatwasher,3/8” (.39 x .938 x .105”) HD
Bolt, HH 5/16-18 x 1-3/4”
Nut, Hex Serr. Flng 5/16-18
Bolt, HH 1/4-20 x 1” Grd 8
Bushing, .376” I.D. Oilite
Lockwasher, 5/16”
Flatwasher, 5/16” (.375 x .875 x .083”)
Flatwasher, 3/8” (.391 x .938 x .105”)
Nut, Hex Elastic Stop 3/8-16
Bolt, HH 3/8-16 x 3-1/4”
Bolt, HH 3/8-16 x 3”
Bolt, HH 3/8-16 x 1-1/2”
Bolt, HH 3/8-16 x 1-1/2” Grd 8
Spindle Assembly
Spindle Shaft
Seal, Top
Nut, Hex Elastic Stop 5/8-11
Discharge Baffle 52V
Pivot, Idler - Short
Baffle, Custom Cut 52V
Bolt, Carriage 3/8-16 x 1”
Flatwasher, 7/16” (.500 x 1.25 x .083”)
Nut, Elastic Stop 7/16-14
Bolt, Deck Adjust
Bolt, Carraige 5/16-18 x 3/4”
Flatwasher, 5/16”
Nut, Center Lock 5/16-18
Wear Pad
Wheel, Anti-Scalp
43589
481024
481022
43644
43312
43296
481025
43297
04021-10
43763
424799
04001-154
Nut, Elastic Stop 5/16-18
Spacer, Gearbox Mount
Mounting Plate, LH Gearbox
Bolt, HH 5/16-18 x 4-3/4”
Bearing Assembly
Spindle Housing
Spacer, Outside
Spacer, Inside
Seal, Bottom
Spindle Bushing, Bottom
Nut, Special 1-1/16-18
Grease Fitting
481035
48114-04
48677
Relief Fitting, Tapered Spindle
45
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