Safety Instructions & Operator’s Manual for
REAR ENGINE RIDING MOWER
SERIES 21
MODEL
M250821BE
M280921B
M281021BE
M300921B
M301021BE
WM280921B
WM301021BE
MODEL NUMBER EXPLANATION
WM
28 10 21 B
E
MIDDLE MARKET
CUTTING WIDTH
ENGINE HP
ENGINE OPTIONS
ENGINE TYPE
SERIES DESIGNATION
WM - Middle Market
25 - 25” Cutting Deck
28 - 28” Cutting Deck
30 - 30” Cutting Deck
08 - 8.0 HP Engine
09 - 9.0 HP Engine
10 - 10.0 HP Engine
21 - Series
Designation
B - Briggs Engine E - Electric Start
Thank you for buying a SNAPPER Product! Before operating your machine, read this manual carefully and pay
particular attention to the “IMPORTANT SAFETY INSTRUCTIONS” on Pages 2 & 3. Remember that all power
equipment can be dangerous if used improperly. Also keep in mind that SAFETY requires careful use in
accordance with the operating instructions and common sense!
COPYRIGHT © 2000
SNAPPER INC.
ALL RIGHTS RESERVED
MANUAL No. 7-4023 (I.R. 9/19/00)
IMPORTANT SAFETY INSTRUCTIONS
PREPARATION
(Continued From Previous Page)
OPERATION
(Continued From Previous Column)
7. Keep people and pets out of mowing area.
Immediately STOP blades, STOP engine, and
STOP machine if anyone enters the area.
8. Check shields, deflectors, switches, blade
controls and other safety devices frequently for
proper operation and location.
14. Exercise CAUTION when pulling loads. Limit
loads to those you can safely control and attach
loads to hitch plate as specified with SNAPPER
attachment instructions.
15. DO NOT operate engine in enclosed areas.
Engine
exhaust
gases
contain
carbon
9. Make sure all safety decals are clearly legible.
Replace if damaged.
monoxide, a deadly poison.
10. Protect yourself when mowing and wear safety
glasses, long pants and substantial footwear.
11. Know how to STOP blades and engine quickly
in preparation for emergencies.
12. Use extra care when loading or unloading the
machine into a trailer or truck.
13. Check grass catcher components frequently for
signs of wear or deterioration and replace as
needed to prevent injury from thrown objects
going through weak or worn spots.
MAINTENANCE
1. DO NOT store machine or fuel container inside
where fumes may reach an open flame, spark or
pilot light such as in a water heater, furnace,
clothes dryer or other gas appliance. Allow
engine to cool before storing machine in an
enclosure. Store fuel container out of the reach
of children in a well ventilated, unoccupied
building.
2. Keep engine free of grass, leaves or excess
grease to reduce fire hazard and engine
overheating.
3. When draining fuel tank, drain fuel into an
approved container outdoors and away from
open flame.
OPERATION
1. Mount and dismount machine from left side.
2. Start engine from operator's seat, if possible.
Make sure blades are OFF and parking brake is
set.
4. Check brakes frequently; adjust, repair or
replace as needed.
3. DO NOT leave machine with engine running.
STOP engine, STOP blades, SET brake, and
Remove key before leaving operators position
of any reason.
4. DO NOT operate machine unless properly
seated with feet on feet rests or pedal(s).
5. STOP BLADES and ENGINE and make sure
blades have stopped before removing grass
catcher or unclogging mower to prevent loss of
fingers or hand.
6. Blades must be OFF except when cutting grass.
Set blades in highest position when mowing
over rough ground.
7. Keep hands and feet away from rotating blades
underneath deck. DO NOT place foot on ground
while BLADES are ON or machine is in motion.
8. DO NOT operate machine without entire grass
catcher or guards in place. DO NOT point
discharge at people, passing cars, windows or
doors.
5. Keep all bolts, nuts and screws properly tight.
Check that all cotter pins are in proper position.
6. Always provide adequate ventilation when
running engine. Exhaust gases contain carbon
monoxide, an odorless and deadly poison.
7. Disconnect negative (black) cable from battery
before performing maintenance or service.
Cranking engine could cause injury.
8. DO NOT work under machine without safety
blocks.
9. Service engine and make adjustments only
when engine is stopped. Remove spark plug
wire(s) from spark plug(s) and secure wire(s)
away from spark plug(s).
10. DO NOT change engine governor speed
settings or overspeed engine.
11. Lubricate machine at intervals specified in
manual to prevent controls from binding.
12. Mower blades are sharp and can cut. Wrap the
blades or wear heavy leather gloves and use
CAUTION when handling them.
13. DO NOT test for spark by grounding spark plug
next to spark plug hole; spark plug could ignite
gas exiting engine.
14. Have machine serviced by an authorized
SNAPPER dealer at least once a year and have
the dealer install any new safety devices.
15. Use only genuine SNAPPER replacement parts
to assure that original standards are
maintained.
9. Slow down before turning.
10. Watch out for traffic when near or crossing
roadways.
11. STOP engine immediately after striking an
obstruction. Inspect machine and repair
damage before resuming operation.
12. Operate machine only in daylight or with good
artificial light.
13. Move joystick (if equipped) SLOWLY to
maintain control during speed and directional
changes.
3
TABLE OF CONTENTS
IMPORTANT SAFETY INSTRUCTIONS.................... 2-3
TABLE OF CONTENTS..................................................4
SECTION 1 - FAMILIARIZATION...................................5
SECTION 4- ADJUSTMENTS AND REPAIR..........18-26
Engine Adjustments & Repair......................................... 18
Mower Deck & Component Adjustments....................... 18
Mower Drive Belt Adjustment ......................................... 18
Blade Brake Adjustment.................................................. 18
Mower Deck Adjustment (Side to Side Levelness) .. 19-20
Mower Deck Adjustment (Front to Rear Levelness) ..... 20
Rear Engine Rider Drive Components ........................... 21
Wheel Brake Adjustment................................................. 21
Mower Blade Replacement.............................................. 22
Blade Sharpening............................................................. 22
Blade Drive Belt Removal/Replacement ........................ 23
Battery Removal, Replacement, Service................... 24-26
SECTION 2 - OPERATING INSTRUCTIONS........... 6-12
Pre-start Checklist .............................................................6
Operator’s Seat Adjustment..............................................6
Starting & Stopping Engine, Blades &
Wheel Drive ................................................................7-10
Starting & Stopping Mower Blades..............................9-10
Starting & Stopping Wheel Drive .................................9-10
Parking Brake ...................................................................11
Cutting Height Adjustment..............................................11
Reverse Lockout Mechanism..........................................12
ACCESSORIES ............................................................26
TROUBLESHOOTING.............................................27-28
MAINTENANCE SCHEDULE.......................................29
MAINTENANCE/REPLACEMENT PARTS ..................30
WARRANTY..................................................................31
PRIMARY MAINTENANCE .....................................32-35
SECTION 3 - MAINTENANCE INSTRUCTIONS ... 13-17
Service – After First 5 Hours ...................................13
Change Engine Oil............................................................13
Service Engine Air Cleaner..............................................13
Check Mower Blade .........................................................13
Check Blade Drive Belt ....................................................14
Blade Brake.......................................................................14
Service Brake / Park Brake..............................................14
Check Interlock System ...................................................14
Reverse Lockout Mechanism..........................................14
Lubrication – Grease Fittings..........................................15
Service - Every 25 Operating Hours...........................15-16
Battery Fluid Level............................................................15
Mower Deck Levelness....................................................15
Clean Mower Deck............................................................15
Mower Blade Spindle - Lubrication.................................15
Mower Deck Linkage – Lubrication ................................15
Front Wheel Bearing - Lubrication..................................15
Rear Axle Bearing – Lubrication.....................................16
Differential / Chain Case - Lubrication ...........................16
Service – Annually............................................................17
Engine ...............................................................................17
Fuel Filter .........................................................................17
Every Two Years...............................................................17
Storage - Out of Season...................................................17
Removing Fuel Tank ........................................................17
4
Section 1 – FAMILIARIZATION+
FUEL
FILLER CAP
VENT
OPERATOR’S
SEAT
FUEL TANK
STEERING
WHEEL
ENGINE
SPEED
CONTROL
REAR
BUMPER
DECK LIFT
LEVER
CLUTCH/BRAKE
PEDAL
TRANSMISSION
SHIFT LEVER
OVERRIDE
LEVER
MOWER BELT
COVER
DISCHARGE
DEFLECTOR
BLADE
LEVER
BLADE
PEDALS
PARK BRAKE
LATCH
MOWER
DECK
FIGURE 1.1
1.1 INTRODUCTION
1.2 NOMENCLATURE
This manual has been prepared for the operator’s of the
SNAPPER Rear Engine Rider. Its purpose, aside from
recommending standard operating procedures and
routine service requirements, is to promote SAFETY
through the use of accepted operating practices. Read,
Understand and Follow the IMPORTANT SAFETY
INSTRUCTIONS on Pages 2 & 3 of this manual and All
SAFETY messages on the Rear Engine Rider and its
attachments before operating.
The nomenclature drawing above, Figure 1.1, shows the
essential parts of the SNAPPER Rear Engine Rider. It is
recommended that all operator’s of this equipment
become thoroughly familiar with the controls,
components, and operation of this machine before
operating. Specific details involving the engine are found
in the separate engine owner’s manual. Study these
manuals before operating and keep both handy for future
reference.
5
Section 2 - OPERATING INSTRUCTIONS
2.1 PRE-START CHECK LIST
OPEN
VENT
Make the following checks and perform the service
required before each start-up.
2.1.1. Check tires and add or release air as needed
to bring pressure to 12 psi in front and 12 psi in rear
tires.
FUEL
FILLER
CAP
2.1.2. Check guards, deflectors and covers to make
sure all are in place and securely tightened.
2.1.3. Check engine oil and add oil as needed to
bring level up to the FULL mark. Refer to engine
owner’s manual for oil specifications. See Figure 2.1.
FUEL
TANK
FIGURE 2.2
2.2 OPERATOR’S SEAT ADJUSTMENT
SAFE
LEVEL
AREA
2.2.1. FRONT TO REAR ADJUSTMENT
1. With the engine stopped, loosen the two adjusting
knobs and move seat to desired position. After
adjustment, tighten knobs securely. If seat does not
move after loosening knobs, it may be necessary to
loosen the 5/16” patch lock screws located at the rear
of the seat using a 1/2 inch wrench. See Figure 2.3.
FIGURE 2.1
2.1.4. Adjust seat as needed to most comfortable
position. Refer to Section “OPERATOR’S SEAT
ADJUSTMENT”.
2.1.5. Check blade control to insure it works freely.
If blade pedals are depressed, blade lever can be
moved manually from “ON” to “OFF” to stop
blade.
OPERATOR’S
SEAT
ADJUSTING
KNOBS
2.1.6. Check Reverse Lockout Mechanism. With
blade pedals depressed, shift lever must not go into
reverse.
2.1.7. Clean exterior surfaces of cutting deck and
engine of any accumulation of dirt, grass, oil, etc.
Keep engine air intake screen and cooling fins clear at
all times.
2.1.8. Add fuel to tank after pushing the Rear Engine
Rider outside where fumes can dissipate. Make sure
fuel filler cap is tight and vent is open after refueling.
Refer to engine owner’s manual for fuel specifications.
See Figure 2.2.
5/16” PATCH LOCK
SCREWS (DO NOT
OVERTIGHTEN)
FIGURE 2.3
6
Section 2 - OPERATING INSTRUCTIONS
2.3 STARTING & OPERATION
TO START ENGINE,
PUSH CLUTCH/BRAKE
PEDAL ALL THE WAY
DOWN
2.3.1. ENGINE (ELECTRIC START)
IMPORTANT: When the ignition key is turned to
“START”, the engine will turn over, but will not start
unless the Clutch/Brake pedal is pressed all the way
down, the Blade Lever is in the “Off” position (See
Figure 2.5).The operator should be in the seat. Start
engine as follows:
1. Move transmission shift lever to (N) Neutral
position. DO NOT start engine with transmission
shift lever in a drive position.
WARNING
It is possible to start engine with transmission shift
lever in a drive position. Follow starting instructions
carefully.
PARKING
BRAKE
LATCH
2. Make certain the Blade Lever is in the “Off”
position. See Figure 2.4.
BLADE LEVER
SHOWN IN “OFF”
POSITION
FIGURE 2.5
CHOKE
POSITION
RELEASE
BLADE
PEDALS
ENGINE
SPEED
CONTROL
FIGURE 2.4
FIGURE 2.6
3. Press Clutch/Brake Pedal all the way down and
hold while starting engine. See Figure 2.5.
4. Open vent on fuel filler cap by turning
counterclockwise. IMPORTANT: Failure to open
vent on the fuel filler cap can cause engine to stall.
See Figure 2.2.
KEY
5. Move engine speed control to the choke position to
start a cold engine. See Figure 2.6.
6. Turn key to the “START” position until engine
starts. See Figure 2.7. NOTE: If after 5 seconds of
cranking the engine and it does not start, release the
key, make sure the Clutch/Brake Pedal is fully
depressed and attempt starting again after waiting for
approximately 20 seconds.
7. After engine starts, move engine speed control to
the “FAST” position, allow a brief warm-up until engine
runs smooth.
FIGURE 2.7
(Continued on Next Page)
7
Section 2 - OPERATING INSTRUCTIONS
2.3 STARTING & OPERATION
5. Move engine speed control to the choke position
to start a cold engine. See Figure 2.6
6. Turn key to “ON” position. See Figure 2.9.
2.3.1. ENGINE (ELECTRIC START) (Continued)
8. Should the battery be too weak to start the engine,
Refer to Section “ENGINE (MANUAL START)” to
manually start the electric start engines.
2.3.2. ENGINE (MANUAL START)
IMPORTANT: When the ignition key is turned to
“ON”, and the recoil handle is pulled, the engine will
turn over, but will not start unless the Clutch/Brake
Pedal is pressed all the way down with Parking
Brake engaged (See Figure 2.8) and the Blade
Lever is in the “Off” position (See Figure 2.4). Start
engine as follows:
KEY
1. Move transmission shift lever to (N) Neutral
position. DO NOT start engine with transmission shift
lever in a drive position.
WARNING
It is possible to start engine with transmission shift
lever in a drive position. Follow starting instructions
carefully.
FIGURE 2.9
2. Make certain the Blade Lever is in the “Off”
position. See Figure 2.4.
3. Press Clutch/Brake Pedal all the way down,
move Parking Brake Latch over and release the
Clutch/Brake Pedal to set Parking Brake. See
Figure 2.8.
7. Pull starter rope with a smooth, even motion until
engine starts. Always guide the starter rope back
into the recoil housing. Never allow rope to snap
back. After Engine starts, move engine speed
control to the “FAST” position.
8. Allow a brief warm-up until engine runs smooth.
TO START ENGINE,
PUSH CLUTCH/BRAKE
PEDAL ALL THE DOWN
MOVE
PARKING
BRAKE
LATCH
OVER
FIGURE 2.8
4. Open vent on fuel filler cap by turning
counterclockwise. NOTE: Failure to open vent on
the fuel filler cap can cause engine to stall. See
Figure 2.2.
8
Section 2 - OPERATING INSTRUCTIONS
WARNING
WARNING
Once blade is disengaged, it should come to a
complete stop in 3 seconds or less. If the blade
continues to rotate after 3 seconds, the blade brake
must be adjusted. Refer to Section “BLADE BRAKE
ADJUSTMENT” for adjustment procedures or return
machine to an authorized SNAPPER dealer for
adjustment. DO NOT CONTINUE to operate machine
until blade brake is adjusted and functioning
properly.
DO NOT operate blades in reverse. STOP BLADES.
LOOK and SEE behind and down for children, pets
and hazards before and while backing.
DEPRESS
CLUTCH/BRAKE
PEDAL
2.3 STARTING & OPERATION
2.3.3. MOWER BLADE
1. With engine running, move engine speed control
to the “FAST” position.
2. Move blade lever forward to the “ON” position,
then depress blade pedals to hold blade lever in the
“ON” position. See Figure 2.10.
BLADE LEVER
SHOWN IN “ON”
POSITION
FIGURE 2.11
TRANSMISSION
BLADE
PEDALS
SHOWN
SHIFT LEVER (MOVE
TO DESIRED SPEED)
DEPRESSED
FIGURE 2.10
2.3.4. WHEEL DRIVE
1. With engine running, adjust engine speed control
to “FAST” position.
2. Depress clutch/brake pedal. See Figure 2.11.
3. Place transmission shift lever in the notch for 1st
speed. See Figure 2.12.
4. Release clutch/brake pedal to begin desired
ground speed.
5. During forward motion, the transmission shift
lever may be placed in any desired forward speed
without depressing the clutch/brake pedal.
NOTE: For best cutting results, move the transmission
shift lever into a slow forward speed and the engine
speed control to a fast position. This combination will
allow the mower blades to lift the grass while cutting
smoothly and evenly.
FIGURE 2.12
9
Section 2 - OPERATING INSTRUCTIONS
WARNING
DO NOT leave machine with the engine running.
Stop engine. Stop blade. Shift to neutral. Engage
parking brake. Remove key.
CLUTCH/BRAKE
PEDAL
2.4 STOPPING - ENGINE, WHEEL DRIVE, BLADE
2.4.1. ENGINE
1. Stop engine by turning key to the “OFF” position.
See Figure 2.13.
TURN TO
“OFF”
POSITION
PARK BRAKE
LATCH SHOWN
ENGAGED
KEY
FIGURE 2.14
BLADE LEVER
(SHOWN IN “OFF”
POSITION)
FIGURE 2.13
BLADE
PEDALS
2.4.2. WHEEL DRIVE
1. Stop motion of Rear Engine Rider by pushing
clutch/brake pedal all the way “DOWN” to apply
brake. See Figure 2.14.
WARNING
Once blade is disengaged, it should come to a
complete stop in 3 seconds or less. If the blade
continues to rotate after 3 seconds, the blade brake
must be adjusted. Refer to Section “BLADE BRAKE
ADJUSTMENT” for adjustment procedures or return
machine to an authorized SNAPPER dealer for
adjustment. DO NOT CONTINUE to operate machine
until blade brake is adjusted and functioning
properly.
FIGURE 2.15
2.4.3. MOWER BLADE
1. Stop mower blade by releasing blade pedals or
moving blade lever rearward to the “OFF” position.
See Figure 2.15.
(Continued on Next Page)
10
Section 2 - OPERATING INSTRUCTIONS
2.4 STOPPING - ENGINE, WHEEL DRIVE, BLADE
2.4.4. PARK BRAKE
2.5. CUTTING HEIGHT ADJUSTMENT
1. Adjust cutting height as desired to any one of
five positions using deck lift lever. Move deck lift
lever up or down to desired cutting height and then
move over to secure in the height of cut notch.
See Figure 2.18.
1. Engage park brake by pushing clutch/brake pedal
“DOWN” and moving the park brake latch to the
“ENGAGED” position. While holding the park brake
latch “ENGAGED”, release clutch/brake pedal to set
park brake. See Figure 2.16.
WARNING
DO NOT park the machine on slopes.
CLUTCH/BRAKE
PEDAL
HEIGHT OF CUT
NOTCHES
PARK BRAKE
LATCH SHOWN
ENGAGED
FIGURE 2.16
DECK LIFT
LEVER
2. Release park brake by pushing down on the
clutch/brake pedal, parking brake latch will move to
the “OFF” position unassisted. See Figure 2.17.
FIGURE 2.18
CLUTCH/BRAKE
PEDAL SHOWN
DISENGAGED
PARK BRAKE
LATCH SHOWN
IN “OFF”
POSITION
FIGURE 2.17
11
Section 2 - OPERATING INSTRUCTIONS
2.6 REVERSE LOCKOUT MECHANISM
2.6.1. Reverse Lockout Mechanism Override
1. Stop machine. Stop blade.
Data indicates that tragic back-over accidents occur
each year. These accidents usually involve
unsupervised children. Many times these children have
been given rides on the machine and have been trained
to view this potentially dangerous piece of machinery as
fun rather than being taught how to avoid danger.
2. Depress and hold Override Lever.
3. Depress and hold Blade Pedals. Release
Override Lever.
4. Move blade lever forward to “ON” position.
WARNING
This riding mower has a Reverse Lockout Mechanism.
This mechanism prevents the mower from being shifted
into reverse with the blade running. To shift into reverse
you must first stop the blade and then shift to reverse. It
is our recommendation that this mechanism remain
functional and the operator of this equipment develop
the habit of never backing up with the blade running. As
the Safety Instructions Indicate, DO NOT operate
blades in reverse. STOP BLADES, LOOK AND SEE
BEHIND AND DOWN for children, pets and hazards
before and while backing.
LOOK and SEE behind and down for children, pets
and hazards before and while backing.
IMPORTANT: DO NOT use the Reverse Lockout
Mechanism Override as the normal operating mode. To
return to the Reverse Lockout Mechanism mode,
release blade pedals to turn blade off. The Override will
reset to Reverse Lockout. Check the Reverse Lockout
Mechanism frequently for proper function. With the
blade pedals depressed, the shift lever must not go into
reverse. DO NOT operate machine if Reverse Lockout
Mechanism is not functioning properly. Contact your
local Snapper dealer for assistance.
We realize that this could cause a change to your
previous mowing method but we encourage you to
adjust to this new system. Do not defeat the Reverse
Lockout Mechanism.
If you operate your mower near roadways or use
attachments that require quicker shifting to reverse,
there is an override lever provided. This lever can be
pushed and held before starting the blade and will allow
reverse operation until the blade pedals are released, at
which time the system will return to its Reverse Lockout
mode. This feature should never be selected unless you
are absolutely sure that no children or others are
present in the mowing area and that all children are
away and supervised by a responsible adult.
12
Section 3 - MAINTENANCE
5. After all the oil has drained, close the drain and
wipe up any oil that may have spilled. See Figure 3.1.
Dispose of used oil properly.
6. Fill engine crankcase with new oil. Refer to your
engine owner’s manual for oil specifications.
WARNING
DO NOT attempt any adjustments, maintenance,
service or repairs with the engine running. STOP
engine. STOP blade. Engage parking brake. Remove
key. Remove spark plug wire from spark plug and
secure away from plug. Engine and components are
HOT. Avoid serious burns, allow all parts to cool
before working on machine. Fuel Filler Cap and vent
must be closed securely to prevent fuel spillage.
3.2.2. SERVICE ENGINE AIR CLEANER
The engine is equipped with a dual element air
cleaner. Both the foam pre-cleaner and cartridge
require service. Refer to Engine Owner’s Manual for
recommended service procedures.
3.1 INTRODUCTION
3.2.3. CHECK MOWER BLADE
To retain the quality of the Rear Engine Rider, use
genuine SNAPPER replacement parts only. Contact a
local SNAPPER dealer for parts and service
assistance. For the correct part or information for a
particular Rear Engine Riding Mower, always mention
the model and serial number. SNAPPER recommends
returning the Rear Engine Rider to an authorized
SNAPPER dealer annually for inspection and addition
of any new devices which might upgrade the safety of
the Rear Engine Rider. For the nearest SNAPPER
dealer in your area, check the yellow pages under the
heading LAWN MOWERS. For engine parts and
service, look for the engine manufacturer’s dealers
under the heading, ENGINES - gasoline.
1. Follow WARNING statement found on this page.
2. Check fuel level in tank. If over 3/4 full, remove
tank. Refer to Section “REMOVING FUEL TANK”. If
3/4 or less, proceed to next step.
3. Carefully stand Rear Engine Rider on rear bumper.
WARNING
Remove the battery if the Rear Engine Rider will be
left standing on the rear bumper for longer than 2
hours. See Section on BATTERY REMOVAL. DO
NOT use a cutting blade that shows signs of
excessive wear or damage on the Rear Engine Rider.
Refer to Section on MOWER BLADE REPLACEMENT
for proper blade inspection and service procedures.
3.2 SERVICE - AFTER FIRST 5 HOURS
Routine maintenance is important to the performance
and life of your Rear Engine Rider. Service performed
properly and at the recommended interval is essential.
Refer to Section “MAINTENANCE SCHEDULE” in this
manual and in the Engine Owner’s Manual. Carefully
complete all of the recommended service procedures.
3.2.1. CHANGE ENGINE OIL
4. Check torque of blade mounting bolts. As
necessary, torque to 30 to 40 ft. lbs. See Figure 3.2.
5. Check blade for sharpness, wear and damage.
See Section on BLADE WEAR LIMITS.
1. Place bricks or wooden blocks under the front
wheels to lower rear of engine.
2. Loosen or remove oil fill cap on engine.
3. Loosen oil drain plug.
4. Place a 2 quart minimum capacity container
under the end of the oil drain. Open oil drain. See
Figure 3.1 for oil drains used on the Rear Engine
Riders.
REMOVE OIL
PLUG TO ALLOW
OIL TO DRAIN
TORQUE BLADE
BOLTS TO 30 TO
40 FT. LBS.
FIGURE 3.2
6. Check blade for straightness. Refer to Section
on ADJUSTING MOWER BLADE.
FIGURE 3.1
13
Section 3 - MAINTENANCE
3.2.5. BLADE BRAKE
WARNING
1. Check blade brake for proper function. Blade should
stop rotating in 3 seconds or less after moving the blade
control lever to the “OFF” position or after releasing the
blade pedals.
DO NOT attempt any adjustments, maintenance, service or
repairs with the engine running. STOP engine. STOP blade.
Engage parking brake. Remove key. Remove spark plug
wire from spark plug and secure away from plug. Engine
and components are HOT. Avoid serious burns, allow all
parts to cool before working on machine. Fuel Filler Cap and
vent must be closed securely to prevent fuel spillage.
WARNING
Blades must stop rotating in 3 seconds or less after
the blade has been turned off. DO NOT operate
machine until blade brake has been adjusted and
functioning properly.
3.2 SERVICE - AFTER FIRST 5 HOURS
3.2.4. CHECK BLADE DRIVE BELT
The blade drive consists of a single belt from the
engine to the deck. Inspect for signs of deterioration
and proper tension.
2. If the blade continues to rotate longer than 3
seconds do not operate machine. Refer to Section
“BLADE BRAKE ADJUSTMENT” or contact your
SNAPPER dealer for assistance.
1. Lower deck to lowest setting.
2. Remove four self-tapping screws, two on each
side of mower drive belt cover. See Figure 3.3.
3. Slide cover back and rotate out.
3.2.6. SERVICE BRAKE / PARK BRAKE
1. Check machine brake for proper function. Engage
park brake. Push machine. Rear tires should skid. Drive
machine forward and apply brake. Machine should come
to a complete stop in less than 5 ft.
REMOVE FOUR
SCREWS TO REMOVE
COVER
2. If brakes are not functioning properly brake
adjustment must be completed before operating
machine. Refer to Section “SERVICE BRAKE – PARK
BRAKE ADJUSTMENT”.
3.2.7. INTERLOCK SYSTEM
Check interlock controls for proper function:
The engine MUST NOT start if:
1. Blade Control is “ON” and/or clutch/brake pedal is
released.
The engine and blades MUST STOP if:
2. The operator leaves the operator position with Blade
Control “ON” and/or clutch/brake pedal is released.
FIGURE 3.3
4. With engine “OFF” and deck in 3rd height of cut
position, move blade lever back to the “ON” position
and depress blade pedals.
5. Measure the belt spacing at idler pulley. See
Figure 3.4. The belt spacing should be 1 1/4” but
no less 1”. If the measurement is less than 1”, the belt
tension should be adjusted. Refer to Section “MOWER
DRIVE BELT ADJUSTMENT”.
WARNING
DO NOT operate machine if interlock system is not
functioning properly. Contact your SNAPPER dealer
immediately for assistance.
ENGINE
PULLEY
3.2.8. REVERSE LOCKOUT MECHANISM
Check function of Reverse Lockout Mechanism with
engine off.
1. Depress and hold blade pedals.
2. Depress and hold clutch/brake pedal.
3. Shift lever must not go into reverse.
BELT SPACING
SHOULD BE
1-1/4”
WARNING
IDLER
PULLEY
DO NOT operate machine if Reverse Lockout
Mechanism is not functioning properly. Contact your
SNAPPER dealer immediately for assistance.
MOWER
DECK
PULLEY
FIGURE 3.4
14
Section 3 - MAINTENANCE
3.2.9. LUBRICATION – GREASE FITTINGS
The following components on the Rear Engine
Rider are equipped with grease fittings and
require periodic lubrication. Apply General
Purpose grease (NLGI No.2) with a grease gun.
1. Front Wheel Bearings. Refer to Section
“FRONT WHEEL BEARINGS – LUBRICATION”.
2. Rear Axle Bearing. Refer to Section “REAR
AXLE BEARING – LUBRICATION”.
IMPORTANT: If the Rear Engine Rider will be on its
rear bumper for longer than two hours, remove the
battery. Refer to Section “BATTERY REMOVAL”.
3.3.6. MOWER DECK LINKAGE - LUBRICATION
Lubricate all mower deck linkage pivot points with a
light coat of motor oil.
3. Mower Blade Spindle. Refer to Section
“MOWER BLADE SPINDLE – LUBRICATION”.
SPINDLE
GREASE
FITTING
3.3 SERVICE - EVERY 25 OPERATING HOURS
3.3.1. Perform all service required after the first 5 hours
of operation. Refer to Section “SERVICE – AFTER 5
HOURS”.
WARNING
DO NOT attempt any adjustments, maintenance,
service or repairs with the engine running. Stop
engine. Stop blade. Engage parking brake. Remove
key. Remove spark plug wire from spark plug and
secure away from plug. Engine and components are
HOT. Avoid serious burns, allow all parts to cool
before working on machine. Fuel Filler Cap and Vent
must be closed securely to prevent fuel spillage.
FIGURE 3.5
3.3.2. BATTERY FLUID LEVEL
1. Remove battery. Refer to Section “BATTERY
REMOVAL”.
3.3.7. FRONT WHEEL BEARING - LUBRICATION
1. Lubricate front wheel bearings with five shots of
general purpose grease, from grease gun. See
Figure 3.6.
2. Remove battery caps. Check fluid level.
3. Add water only to bring fluid to proper level –
approximately 3/16” above plates.
DO NOT OVERFILL.
4. Reinstall battery. Refer to Section “BATTERY
INSTALLATION”.
FRONT WHEEL
GREASE FITTING
3.3.3. MOWER DECK LEVELNESS
Check mower deck for proper level. Adjust as required.
Refer to Section “MOWER DECK ADJUSTMENT –
LEVELNESS”.
3.3.4. CLEAN MOWER DECK
1.Follow WARNING statement found on this page.
2.Check fuel level in tank. If over 3/4 full, remove
tank. Refer to Section “REMOVING FUEL TANK”. If
3/4 or less, proceed to next step.
3.Carefully stand Rear Engine Rider on rear bumper.
4.Clean underside of mower deck, removing all
accumulation of grass clippings and debris.
5.Clean top of deck, removing all grass clippings and
debris.
FIGURE 3.6
(Continued on Next Page)
3.3.5 MOWER BLADE SPINDLE - LUBRICATION
1. Follow WARNING statement found on this page.
2. Check fuel level in tank. If over 3/4 full, remove
tank. Refer to Section “FUEK TANK REMOVAL”. If 3/4
or less, proceed to next step.
3. Carefully stand Rear Engine Rider on rear bumper.
4. Lubricate spindle with three shots of general
purpose grease from grease gun. See Figure 3.5.
15
Section 3 - MAINTENANCE
3.3 SERVICE - EVERY 25 OPERATING HOURS
3.3.8. REAR AXLE BEARING
DIFFERENTIAL
1. The left rear axle bearing requires three shots of
general purpose grease from grease gun. See
Figure 3.7.
NOTE: Some models are equipped with a pre-
lubricated sealed bearing and require no additional
lubrication.
FILL/LEVEL
PLUG P.N. 1-1024
2. The right rear axle bearing is lubricated by the
differential lubricant and requires no grease.
LEFT REAR
AXLE BEARING
GREASE
FITTING
FIGURE 3.8
WARNING
DO NOT attempt any adjustments, maintenance,
service or repairs with the engine running. STOP
engine. STOP blade. Engage parking brake. Remove
key. Remove spark plug wire from spark plug and
secure away from plug. Engine and components are
HOT. Avoid serious burns, allow all parts to cool
before working on machine. Fuel Filler Cap and vent
must be closed securely to prevent fuel spillage.
3. Check fill/level plug for damage. If signs of wear or
cracks are visible, replace plug with new plug. See
Figure 3.9.
4. To check lubricant in chain case, remove fill/level
plug and look for lubricant on the internal
components of the chain case. If no lubricant is
visible, add "SNAPPER Transmission” grease as
needed. See Figure 3.9.
FIGURE 3.7
3.3.9. DIFFERENTIAL/CHAIN CASE - LUBRICATION
1. Stand rear engine rider on its rear bumper and
check the fill/level plug, for cracks and wear. Replace
fill/level plug if signs of wear are visible.
AXLE
BOOTS
IMPORTANT: If the Rear Engine Rider will be on
its rear bumper for longer than two hours, remove
the battery. See Section on BATTERY REMOVAL.
2. To check lubricant, remove fill/level plug and
visually inspect for lubricant on the internal parts of the
differential. If no lubricant is visible on the internal
parts of the differential, add “SNAPPER Transmission”
grease as needed. See Figure 3.8.
CHAIN
CASE
FILL/LEVEL PLUG
P.N. 1-1024
IMPORTANT: Overfilling of the differential with lubricant will
cause lubricant to leak onto drive components of the Rear
Engine Rider.
FIGURE 3.9
3.3.10. Check “MAINTENANCE SCHEDULE” Section of
Engine Owner’s Manual for additional engine service.
16
Section 3 - MAINTENANCE
3.4 SERVICE - ANNUALLY
WARNING
3.4.1.
Perform all maintenance as specified in
DO NOT attempt any adjustments, maintenance, service
or repairs with the engine running. Stop engine. Stop
blade. Engage parking brake. Remove key. Remove
spark plug wire from spark plug and secure away from
plug. Engine and components are HOT. Avoid serious
burns, allow all parts to cool before working on machine.
Fuel Filler Cap and Vent must be closed securely to
prevent fuel spillage.
“MAINTENANCE SCHEDULE” Section of this manual.
3.4.2. FUEL FILTER
Service fuel filter as instructed below, on COLD
ENGINE ONLY!
IMPORTANT: To stop flow of fuel, tank may be removed
from bracket and set on the floor so the fuel level will be
below the filter. Refer to Section “REMOVING FUEL TANK”.
1. Remove hose clamps from fuel filter.
3.6 STORAGE (OUT OF SEASON)
2. Remove fuel lines from filter. Discard filter.
3. Install new fuel filter. See Figure 3.10.
4. Reinstall fuel tank into bracket.
If desired, the Rear Engine Rider can be stored on
the rear bumper. Perform the following procedures
to insure the Rear Engine Rider will operate
properly when taken out of storage.
3.6.1. Thoroughly clean the Rear Engine Rider by
removing all grass clippings and debris.
3.6.2. Perform maintenance and lubrication as
required.
HOSE
CLAMPS
3.6.3. Drain fuel from fuel tank.
3.6.4. Start engine and allow it to run until engine
runs out of fuel. This allows the carburetor and fuel
system to remain clean during storage.
FUEL
FILTER
3.6.5. Remove battery.
Refer to Section
“BATTERY STORAGE”.
3.6.6. Close vent on fuel filler cap.
3.6.7. Carefully stand Rear Engine Rider on rear
bumper in desired location for storage.
3.7 REMOVING FUEL TANK
Before removing fuel tank from rear engine rider,
move rider outdoors where fumes can be easily
dissipated. Removal of the tank is accomplished
from the left side of the machine by pulling the tank
straight up and away from the fuel tank bracket.
See Figure 3.11. Holding the fuel tank, remove the
fuel filler cap and pour remaining fuel in an
approved container.
P.N. 1-4359
FIGURE 3.10
3.5 EVERY TWO YEARS
In addition to regular maintenance, the following
components of the Rear Engine Rider should be
carefully inspected every two years for wear or
damage. Replace worn or damaged parts with
genuine SNAPPER replacement parts available
from an authorized SNAPPER dealer.
FUEL
FILLER
CAP
3.5.1. All bushings and pivot areas.
3.5.2. Check both front wheel king pins.
3.5.3. Transmission shift lever and detent.
3.5.4. Clutch disc.
3.5.5. Clutch Yoke (See Figure 4.9).
3.5.6. Mower deck linkage and pivot areas.
FUEL TANK
FUEL
TANK
BRACKET
FIGURE 3.11
17
Section 4 - ADJUSTMENTS & REPAIR
4. If the distance is less than 1”, adjust belt tension.
5. Remove hairpin and flat washers from pivot stud.
See Figure 4.2.
6. Pull front frame forward until distance between
belt, with blade lever “ON”, measures 1-1/4”.
WARNING
DO NOT attempt any adjustments, maintenance,
service or repairs with the engine running. Stop
engine. Stop blade. Engage parking brake. Remove
key. Remove spark plug wire from spark plug and
secure away from plug. Engine and components are
HOT. Avoid serious burns, allow all parts to cool
before working on machine. Fuel Filler Cap and Vent
must be closed securely to prevent fuel spillage.
4.1 ENGINE ADJUSTMENTS & REPAIR
Refer to the engine owner’s manual for those
adjustments and/or repairs that can be made by the
owner.
FLAT
WASHERS
HAIRPIN
FRAME
SPACERS
4.2 MOWER DECK & COMPONENT ADJUSTMENTS
The following mower deck and component
adjustments and repairs can be made by the owner.
However, if there is difficulty in achieving these
adjustments and repairs, it is recommended that
these repairs be made by an authorized SNAPPER
dealer.
FIGURE 4.2
7. Install required number of snap-in frame spacers
behind channel pivot until the 1-1/4” distance between
belt is maintained. See Figure 4.3.
WARNING
Once blade is disengaged it should come to a stop in 3
seconds or less. If the blade continues to rotate after 3
seconds the blade brake must be adjusted. DO NOT
continue to operate the machine if the blade brake is
not operating properly.
SNAP-IN FRAME
SPACER
P.N. 2-8395
4.2.1. MOWER DRIVE BELT ADJUSTMENT
(FOR 25”, 28" & 30" "M" MODELS)
1. Remove mower drive belt cover. Refer to
Section “CHECK BLADE DRIVE BELT”.
2. Move blade lever up and over to the “ON”
position.
3. Place deck cutting height in the 3rd position.
Measure the belt spacing at idler pulley. The
distance should measure 1-1/4” but no less than 1”.
See Figure 4.1.
FIGURE 4.3
1-1/4”
8. Reinstall the required amount of flat washers
removed in step “5.” and install hairpin. See Figure
4.2. Retain any remaining spacers for readjustment
when a new belt is installed.
IMPORTANT: The SNAPPER "M" Series Rear Engine
Rider Models are shipped with additional spacers
specifically designed for the Rear Engine Rider. Should
additional spacers be required, contact an authorized
SNAPPER dealer.
ENGINE DRIVE
IDLER
PULLEY
PULLEY
ASSEMBLY
SPINDLE
PULLEY
FIGURE 4.1
18
Section 4 - ADJUSTMENTS & REPAIR
WARNING
1/8” TO 1/4”
LATCH
Once blade is disengaged it should come to a stop
in 3 seconds or less. If the blade continues to rotate
after 3 seconds the blade brake must be adjusted.
DO NOT continue to operate the machine if the blade
brake is not operating properly.
BLADE
LEVER
PLATE
4.2.2. BLADE BRAKE ADJUSTMENT
The automatic Blade Brake should stop the blades
within
3
seconds anytime the blades are
disengaged by moving blade lever to the "OFF"
position or by releasing the Blade Pedals. When
the Blade Brake is properly adjusted there should
be 1/8" to 1/4" clearance between the Blade
Engagement Lever and the back of the Latch
Plate. Check this by disengaging the Blade Lever
and depressing the Blade Pedals as shown in
Figure 4.2. If clearance is greater than 1/4"
perform the following adjustment.
FIGURE 4.5
WARNING
DO NOT attempt any adjustments, maintenance, service
or repairs with the engine running. Stop engine. Stop
blade. Engage parking brake. Remove key. Remove
spark plug wire from spark plug and secure away from
plug. Engine and components are HOT. Avoid serious
burns, allow all parts to cool before working on machine.
Fuel Filler Cap and Vent must be closed securely to
prevent fuel spillage.
1. Remove Belt Cover. Refer to Section “BLADE
BELT COVER REMOVAL”.
2. With the blade engagement lever disengaged,
hold the blade pedals down and measure the
distance between the front of the blade lever and the
rear of the latch plate. The dimension should be 1/8"
to 1/4" clearance between lever and plate. See Figure
4.5. If the dimension is incorrect go to step 3.
3. If dimension is greater than 1/4", rotate nut
clockwise to increase brake tension. If dimension is
less than 1/8", rotate nut counter-clockwise to
decrease brake tension. See Figure 4.4.
4.2.3. MOWER DECK ADJUSTMENT
(Side-To-Side Levelness)
Before making deck leveling adjustments, check the tire
pressure. Front tires 12 psi, rear tires 12 psi. If tires are
properly inflated and mowing is still uneven, adjust side-
to-side deck levelness.
4. Reinstall spindle cover.
1. Place Rider on a smooth level surface.
2. Follow WARNING statement found on this page.
3. Place a piece of angle iron, pipe, or similar object
under center of deck at the rear.
4. Remove rear hanger chains and allow center, rear of
deck to rest on angle iron.
5. Measure the distance from blade tips to floor. If the
measurement is within 1/8” from side-to-side, the deck
attitude is satisfactory. If difference from side-to-side is
greater than 1/8”, continue with adjustment.
6. Loosen the carriage bolt and nut retaining the left
side of the front lift arm and adjuster. Only loosen the
bolt and nut to the point where some tension remains
but lift arm can be moved.
WARNING
DO NOT operate machine until blade brake is
adjusted and functioning properly. If blade stop time
can not be achieved with the adjustment procedure
described above, take machine immediately to an
authorized Snapper dealer.
BLADE PEDAL
CARRIAGE BOLT
(not shown)
ROTATE NUT CLOCKWISE TO
INCREASE BRAKE TENSION
NUT
SPACER
ROTATE NUT COUNTER CLOCKWISE TO
DECREASE BRAKE TENSION
FRONT LIFT ARM
FIGURE 4.4
FIGURE 4.6
19
Section 4 - ADJUSTMENTS & REPAIR
WARNING
FLOOR
DO NOT attempt any adjustments, maintenance,
service or repairs with the engine running. Stop
FRONT
engine. Stop blade. Engage parking brake. Remove
key. Remove spark plug wire from spark plug and
secure away from plug. Engine and components are
HOT. Avoid serious burns, allow all parts to cool
before working on machine. Fuel Filler Cap and Vent
must be closed securely to prevent fuel spillage.
REAR
X-1/8”
HANGER
CHAIN
PIVOT
4.2.3. MOWER DECK ADJUSTMENT
(Side-To-Side Levelness)
HAIRPIN
(Continued from previous page)
7. Move one side of the deck up or down to
achieve levelness between both sides of deck. See
Figure 4.6.
8. Tighten carriage bolt and nut securely. Recheck both
sides of deck for correct levelness.
9. Readjust rear hanger chain pivots to align with
holes in support brackets.
See Figure 4.7.
10. Remove angle iron, pipe, or similar object and
proceed to check front to rear levelness.
SUPPORT
BRACKET
4.2.4. MOWER DECK ADJUSTMENT
(Front to Rear Levelness - 25” & 28” Decks)
With the Rear Engine Rider on a smooth, level
surface, rotate blade until blade tips are at front and
rear of deck. Measure the distance from blade tips
to floor. The distance should be the same, or the
rear 1/8” lower than the front. If the rear blade tip is
higher or is more than 1/8” lower than the front,
proceed with adjustment.
HANGER
CHAIN
FIGURE 4.7
(Front to Rear Levelness - 30” Decks)
With the Rear Engine Rider on a smooth, level
surface, rotate blade until blade tips are at front and
rear of deck. Measure the distance from blade tips
to floor. The distance should be the same, or the
rear 1/8” to 1/4” higher than the front. If the rear
blade tip is higher or is more than 1/4” higher than
the front, proceed with adjustment.
1. Remove rear hanger chains.
2. Turn each hanger pivot the same number of
rotations on the eye-bolt to raise or lower the rear of
the deck. See Figure 4.7.
3. Reinstall rear hanger chains and measure blade
tips again.
4. Repeat steps “1” through “3” until proper
levelness is obtained.
20
Section 4 - ADJUSTMENTS & REPAIR
7. Adjust cable up or down using the jam-nuts to
WARNING
obtain a distance of 1/2” to 3/4” between end of
clutch/brake cable (adjustment shown in inset of
Figure 4.9) and bottom of housing. See Figure 4.9.
8. After adjustment is complete, securely tighten
cable jam-nuts.
DO NOT attempt any adjustments, maintenance,
service or repairs with the engine running. Stop
engine. Stop blade. Engage parking brake. Remove
key. Remove spark plug wire from spark plug and
secure away from plug. Engine and components are
HOT. Avoid serious burns, allow all parts to cool
before working on machine. Fuel Filler Cap and
Vent must be closed securely to prevent fuel
spillage.
CHAIN
CASE
CLUTCH
YOKE
4.3 REAR ENGINE RIDER DRIVE COMPONENTS
Your Snapper rider is equipped with a patented
smooth start clutch. The clutch should operate
smoothly and provide ample traction. If problems are
experienced, contact your Snapper dealer for repair.
4.3.1. WHEEL BRAKE ADJUSTMENT
CABLE
HOUSING
Test the wheel brake on a dry concrete surface.
When properly adjusted, the Rear Engine Rider will
stop within 5 feet from fastest speed. If stopping
distance is more than 5 feet, the wheel brake should
be adjusted as follows:
1. Follow WARNING statement found on this page.
2. Check fuel level in tank. If over 3/4 full, remove
tank. Refer to Section “REMOVING FUEL TANK”. If
3/4 or less, proceed to next step.
SPRING
CABLE END
COTTER
HOUSING
COTTER PIN
PIN
1/2” TO 3/4”
3. Carefully stand Rear Engine Rider on rear
bumper.
4. Depress clutch/brake pedal all the way down.
Move and hold the park brake lever in the “ON”
position and release the clutch/brake pedal to lock
the park brake. See Figure 4.8.
FIGURE 4.9
BRAKE CABLE
CHAIN CASE
DEPRESS
CLUTCH/BRAKE
LOOSEN
JAM NUTS
MOVE PARKING
BRAKE LATCH OVER
TO LOCK
FIGURE 4.8
5. Measure the distance between end of
clutch/brake cable and bottom of housing.
Measurement should be no less than 1/2” and no
greater than 3/4”. See inset of Figure 4.9.
6. If measurement is less than 1/2” or greater than
3/4”, loosen the two jam-nuts. See Figure 4.10. Hold
the clutch/brake cable to the chain case bracket.
FIGURE 4.10
21
Section 4 - ADJUSTMENTS & REPAIR
5. Inspect condition of blade. See Figure 4.11.
WARNING
6. If blade is in good condition, sharpen at 22 to 28
degrees. DO NOT sharpen beyond existing cutting
edge. See Figure 4.13.
7. Check blade balance after sharpening. If
necessary, correct blade balance by grinding the
heavy end of blade.
8. Reinstall blade. See Figure 4.12. Torque blade
mounting bolts to recommended range of 30 to 40
ft. lbs.
DO NOT attempt any adjustments, maintenance,
service or repairs with the engine running. STOP
engine. STOP blade. Engage parking brake. Remove
key. Remove spark plug wire from spark plug and
secure away from plug. Engine and components are
HOT. Avoid serious burns, allow all parts to cool
before working on machine. Fuel Filler Cap and vent
must be closed securely to prevent fuel spillage.
DO NOT use a cutting blade that shows signs of
excessive wear or damage on the Rear Engine Rider.
On Rear Engine Riders equipped with a grass
catcher attachment, the air lifts should be replaced
when the blade is replaced.
LOCKWASHER
NUT
4.4 MOWER BLADE REPLACEMENT
4.4.1. BLADE WEAR LIMITS
1. Inspect blade frequently for signs of excessive
wear or damage. See Figure 4.11.
NEW BLADE
BLADE
MOUNTING
BOLTS
WEAR LIMIT
(NOTCH
BLADE
STARTS)
FIGURE 4.12
DANGEROUS CONDITION!
DO NOT USE ON MOWER!
REPLACE WITH NEW BLADE.
DO NOT SHARPEN
BEYOND
ORIGINAL
22 TO 28º
FIGURE 4.11
BLADE TIP
WARNING
Blades are extremely sharp and can cause severe
injuries. Wear heavy leather gloves when working on or
handling blades. DO NOT use blades that show signs
of wear or damage.
ORIGINAL CUTTING EDGE
4.4.2. BLADE SHARPENING
1. Follow WARNING statement found on this page.
2. Check fuel level in tank. If over 3/4 full, remove
tank. Refer to Section “REMOVING FUEL TANK”. If
3/4 or less, proceed to next step.
FIGURE 4.13
3. Carefully stand Rear Engine Rider on rear bumper.
4. Remove blade. See Figure 4.12.
22
Section 4 - ADJUSTMENTS & REPAIR
10. Reinstall idler removed in Step 8. The idler belt
WARNING
guide tab should be positioned in the hole located on
idler arm. Tighten idler pulley bolt securely.
11. Adjust belt guide. See Figure 4.15 for proper
belt-to-belt guide clearances.
12. Check mower drive belt tension and adjust if
necessary. Refer to Section “MOWER DRIVE BELT
ADJUSTMENT”.
DO NOT attempt any adjustments, maintenance,
service or repairs with the engine running. STOP
engine. STOP blade. Engage parking brake. Remove
key. Remove spark plug wire from spark plug and
secure away from plug. Engine and components are
HOT. Avoid serious burns, allow all parts to cool
before working on machine. Fuel Filler Cap and vent
must be closed securely to prevent fuel spillage.
13. Reinstall mower drive belt cover.
4.5 BLADE DRIVE BELT REPLACEMENT
Inspect mower drive belt as described in Section
CHECK MOWER DRIVE BELT. Replace belt if signs
of excessive wear and/or damage are present.
IDLER BELT GUIDE
1/16” NOMINAL
4.5.1. BELT REMOVAL
1. Remove mower drive belt cover. Refer to
Section on Drive Belt Cover Removal.
2. Remove old belt.
4.5.2. BELT REPLACEMENT
1. Follow WARNING statement found on this page.
2. Check fuel level in tank. If over 3/4 full, remove
tank. Refer to Section “REMOVING FUEL TANK”. If
3/4 or less, proceed to next step.
FIGURE 4.15
3. Carefully stand Rear Engine Rider on rear bumper.
4. Route new belt through engine belt guide up to
engine pulley. See Figure 4.14.
ENGINE PULLEY
ENGINE
BELT
GUIDE
FIGURE 4.14
5. Move transmission shift lever to the neutral (N)
position.
6. Rotate clutch yoke (clutch yoke shown in Figure
4.9) out with your hand and work belt between drive
disc and rubber driven disc.
7. To clear the primary chain case, move
transmission shift lever to the #5 position. Route
belt around drive disc and into drive pulley belt
groove.
8. Remove idler.
9. Route belt onto spindle pulley. Make sure belt is
inside spindle belt guide and idler belt guide. Route belt
as shown for the individual models shown in Figure
4.15.
23
Section 4 - ADJUSTMENTS & REPAIR
WARNING
POSITIVE
TERMINAL
INSULATOR
DO NOT attempt any adjustments, maintenance,
service or repairs with the engine running. Stop
engine. Stop blade. Engage parking brake. Remove
key. Remove spark plug wire from spark plug and
secure away from plug. Engine and components are
HOT. Avoid serious burns, allow all parts to cool
before working on machine. Fuel Filler Cap and Vent
must be closed securely to prevent fuel spillage. DO
NOT attempt to service or charge the battery while it
is installed on the machine.
RED
POSITIVE (+)
CABLE
BLACK
NEGATIVE (-)
CABLE
4.6 BATTERY
4.6.1. BATTERY REMOVAL
1. Carefully pull each side of battery cover away
from ratchet fasteners and remove cover. See
Figure 4.16.
INSTALL BATTERY POSITIVE
(+) END FIRST INTO BATTERY
COMPARTMENT IN DIRECTION
OF ARROW AS SHOWN
BATTERY COVER
FIGURE 4.17
WARNING
Cables must be connected to battery terminals in the
proper position as show in Figure 4.17. DO NOT
attempt to charge battery while installed on the Rear
Engine Rider. DO NOT use “BOOST” chargers on
the battery.
RATCHET
FASTENERS
4.6.2. BATTERY INSTALLATION
1. Slide battery partially into battery housing.
2. Connect positive (+) cable (red) first, from wiring
harness to the positive terminal (+) on battery using
bolt and nut provided in hardware bag. Connect
negative (-) cable (black) last, to negative terminal (-)
on battery using bolt and nut. Apply a small amount of
grease over terminals to prevent corrosion.
3. Insert battery completely into battery housing.
4. Reinstall positive terminal cover.
5. Reinstall battery cover. See Figure 4.16.
FIGURE 4.16
2. Slide battery from battery box to gain access to
terminal cables.
3. Observe and note cable positions on battery.
See Figure 4.17.
4. Disconnect cables from battery terminals,
disconnecting BLACK (Negative) cable first. Retain
mounting bolts and nuts.
24
Section 4 - ADJUSTMENTS & REPAIR
WARNING
WARNING
The electrolyte (acid) produces a highly explosive gas.
Keep all sparks, flame and fire away from area when
charging battery or when handling electrolyte or
battery. Electrolyte (acid) is a highly corrosive liquid.
Wear eye protection. Wash affected areas immediately
after having eye or skin contact with electrolyte (acid).
Battery acid is corrosive. Rinse empty acid containers
with water and mutilate before discarding. If acid is
spilled on battery, bench, or clothing, etc., Flush with
clear water and neutralize with baking soda. DO NOT
attempt to charge battery while installed on the RIDER.
DO NOT use “BOOST” chargers on the battery.
DO NOT attempt to charge battery while installed on the
Riding Mower. DO NOT use “BOOST” chargers on the
battery. DO NOT OVERFILL!
5. Slow charge the battery at 1 amp for 2 hours to
bring the battery to full charge.
6. After charging, check level of electrolyte and add
as needed to bring level to 3/16” above cell plates.
7. Reinstall cell caps.
8. Slide battery partially into battery housing.
9. Connect positive (+) cable (red) first, from wiring
harness to the positive terminal (+) on battery using
bolt and nut provided in hardware bag. Connect
negative (-) cable (black) last, to negative terminal (-)
on battery using bolt and nut. Apply a small amount of
grease over terminals to prevent corrosion.
4.6.3. BATTERY SERVICE
1. Remove battery. Refer to Section “BATTERY
REMOVAL”.
2. Place battery in a well ventilated area on a level
surface.
10. Insert battery completely into battery housing.
11. Reinstall battery cover. See Figure 4.16.
3. Using distilled water, refill cells as required to
cover cell plates of which can also be visualized
through the plastic battery case.
4. With cell caps removed, connect battery charger
to battery terminals. Red to positive (+) terminal
and black to negative (-) terminal.
WARNING
Shield the positive terminal with terminal cover
located on battery harness. This prevents metal from
touching the positive terminal which could cause
sparks.
5. Slow charge battery at 1 amp for 10 hours.
6. If battery will not accept charge or is partially
charged after 10 hours of charging at 1 amp,
replace with new battery.
4.6.6. BATTERY TESTING
There are two types of battery tests: Unloaded and
Loaded. The unloaded test is the procedure that will
be discussed. It’s the simplest and most commonly
used. An unloaded test is made on a battery without
discharging current. To perform unloaded testing,
check charge condition using either a hydrometer or
voltmeter.
1. Using a voltmeter, voltage readings appear
instantly to show the state of charge. Remember to
hook the positive lead to the battery’s positive
terminal, and the negative lead to the negative
terminal.
2. A hydrometer measures the specific gravity of
each cell. The specific gravity tells the degree of
charge; generally, a specific gravity of about 1.265
to 1.280 indicates full charge. A reading of 1.230 to
1.260 indicates the battery should be charged. The
chart on the next page shows the charge level as
measured by syringe float hydrometer, digital
voltmeter and five ball hydrometer.
4.6.4. BATTERY STORAGE
If mower is to be stored out of season on its rear
bumper, it is recommended the battery be removed,
charged and stored.
1. Remove battery. (Refer to Section BATTERY
REMOVAL).
2. Perform battery service.
3. Bring battery to full charge, if required.
4. Store battery in an area away from the RIDER on a
wood surface. DO NOT STORE BATTERY ON A
CONCRETE SURFACE.
4.6.5. NEW BATTERY PREPARATION
1. Remove battery from carton.
2. Place battery in a well ventilated area on a level
non-concrete surface.
3. Remove battery cell caps. Fill cells as required
with electrolyte (purchased separately) to proper
level. Fill to 3/16” above cell plates. Filling battery
with electrolyte will bring the battery to 80% charged
state.
(Battery Testing Chart on Next Page)
4. With cell caps removed, connect battery charger to
battery terminals; RED to positive (+) and BLACK to
negative (-) terminal.
IMPORTANT: 3/16” above cell plates is the recommended
level. DO NOT place anything in battery other than specified
electrolyte.
25
Section 4 - ADJUSTMENTS & REPAIR
4.6.6. BATTERY TESTING
Battery Condition Chart
State of Charge
100% Charged w/ Sulfate Stop
100% Charged
75% Charged
50% Charged
Syringe Hydrometer
Digital Voltmeter
12.80v
Five Ball Hydrometer
Five Balls Floating
Four Balls Floating
Three Balls Floating
Two Balls Floating
One Ball Floating
1.280
1.265
12.60v
1.210
12.40v
1.160
12.10v
25% Charged
1.120
11.90v
0% Charged
Less than 1.100
Less than 11.80v
Zero Balls Floating
SNAPPER REAR ENGINE RIDER ACCESSORIES
PART NO.
DESCRIPTION OF KIT
MODELS USED ON
6-0517................................Wheel Weight (8” Wheels) ...............................All Rear Engine Riders
6-0601................................Smooth Start Clutch..........................................All Rear Engine Riders
6-0697................................Dump Cart.........................................................All Rear Engine Riders
6-1400................................Gauge Wheel....................................................All 33” Deck Rear Engine Riders
6-0794................................Gauge Wheel....................................................All 41” & 42” Deck Rear Engine Riders
6-0941................................Single Bag Catcher...........................................All 25” Deck Rear Engine Riders
6-0942................................Single Bag Catcher...........................................All 26” & 30” Deck Rear Engine Riders
6-0943................................Single Bag Catcher...........................................All 28” & 33” Deck Rear Engine Riders
6-0944................................Single Bag Catcher...........................................All 41” & 42” Deck Rear Engine Riders
6-0945................................Twin Bag Catcher .............................................All 41” & 42” Deck Rear Engine Riders
6-0946................................Twin Bag Catcher .............................................All 28” & 33” Deck Rear Engine Riders
6-0947................................Bag-N-Wagon...................................................All 28” & 33” Deck Rear Engine Riders
6-0948................................Thatcherizer......................................................All Series 7 & Newer Riders
6-0964................................Wagon Cover....................................................All 28” & 33” Deck Rear Engine Riders
6-1190................................Weight (Front)...................................................All Series 7 & Newer Riders
6-0959................................Dozer Blade (36” Blade)....................................All Rear Engine Riders
6-0357................................Tire Chains (Tires-16 x 6.50-8).........................All Rear Engine Riders
6-0358................................Tire Chains (Tires-16 x 4.80-8).........................All Rear Engine Riders
6-1823................................Ninja Recycling (Cover) ....................................All 25” Deck Rear Engine Riders
6-1049................................Recycling (Cover)..............................................All 25” Deck Rear Engine Riders
6-1253................................Ninja Recycling (Cover) ....................................All 28” Deck Rear Engine Riders
6-1254................................Ninja Recycling (Cover) ....................................All 30” Deck Rear Engine Riders
6-1255................................Ninja Recycling (Cover) ....................................All 33” Deck Rear Engine Riders
6-1220................................Ninja Recycling (Cover) ....................................All 41” & 42” Deck Rear Engine Riders
6-1910................................Utility Trailer
6-1911................................Aerator
6-1912................................Dethatcher
6-1913................................Lawn Sweeper
6-1914................................Dethatcher Kit
6-1915................................Lawn Roller
6-1916................................Broadcast Spreader
26
TROUBLESHOOTING
PROBLEM
PROBABLE CAUSE
CORRECTIVE ACTION
1. Fuel tank empty.
2. Engine needs choking.
3. Spark plug wire disconnected.
4. Faulty parking brake, blade or ignition switch.
5. Park brake not engaged.
6. Blown Fuse.
1. Fill fuel tank with fresh fuel to proper level.
2. Move choke control to “CHOKE” position.
3. Place spark plug wire onto spark plug.
4. Contact authorized SNAPPER dealer.
5. Engage park brake.
Engine Will Not
Start Using
Recoil Starter
6. Replace with new 20 AMP fuse.
7. Faulty interlock module.
8. Faulty parking brake or blade switch.
9. Ignition is in the OFF position.
7. Contact authorized SNAPPER dealer.
8. Contact authorized SNAPPER dealer.
9. Turn ignition switch to the RUN position.
1. Fill fuel tank with fresh fuel to proper level.
2. Move choke control to “CHOKE” position.
3. Place spark plug wire onto spark plug.
4. Contact authorized SNAPPER dealer.
5. Engage park brake.
1. Fuel tank empty.
2. Engine needs choking.
3. Spark plug wire disconnected.
4. Faulty parking brake, blade or ignition switch.
5. Park brake not engaged.
Engine Will Not
Start Using
Electric Starter
6. Blown Fuse.
6. Replace with new 20 AMP fuse.
7. Faulty interlock module.
7. Contact authorized SNAPPER dealer.
8. Contact authorized SNAPPER dealer.
9. Turn ignition switch to the START position.
10. Charge or replace with new battery.
11. Clean and connect battery cables. If
broken, replace with new battery cables.
12. Contact authorized SNAPPER dealer.
13. Connect starter cable. If broken, replace
with new starter cable.
8. Faulty parking brake or blade switch.
9. Ignition is in the OFF position.
10.Battery is weak or dead.
11. Battery cables loose, broken disconnected or
corroded.
12. Faulty electric starter or starter solenoid.
13. Starter cable loose, broken or disconnected
14. Electrical wiring harness disconnected or broken. 14. Connect or replace with new wiring harness.
1. Operator not in seat.
2. Choke control in the “CHOKE” position.
3. Fuel tank empty.
4. Engine air pre-cleaner and or air cleaner dirty.
5. Spark plug defective or gap set improperly.
6. Fuel filter restricted.
1. Sit in operator’s seat.
Engine Stalls After
Running
2. Move choke control to “OFF” position.
3. Fill fuel tank with fresh fuel to proper level.
4. Clean free of all debris.
5. Service spark plug.
6. Replace fuel filter.
7. Water, debris or stale fuel in fuel system.
1. Excessive load on engine.
2. Engine air pre-cleaner or air cleaner dirty
3. Spark plug faulty.
7. Drain and clean fuel system.
1. Lessen load.
2. Clean or replace filters.
Engine Loses
Power
3. Service spark plug.
4. Water, debris or stale fuel in fuel system.
5. Debris build up on engine cooling screen.
4. Drain and clean fuel system. Replace filter.
5. Clean all debris from engine cooling screen.
1. Throttle control set too “FAST”.
1. Set throttle control to “SLOW” and allow
engine to idle. Then, turn key to “OFF”.
Engine Backfires
When Turned To
“STOP”
1. Damaged, out of balance or bent mower blades. 1. Service mower blade(s).
Excessive Vibration
2. Loose blade components.
3. Loose or missing air lift (if equipped).
4. Lumpy or frayed belt
2. Service and tighten loose parts.
3. Replace air lifts. Tighten to proper torque.
4. Replace belt.
5. Bent Idler, stationary or spindle pulley
5. Replace pulley.
(Trouble Shooting Continued on Next Page)
27
TROUBLESHOOTING
PROBLEM
PROBABLE CAUSE
CORRECTIVE ACTION
1. Drive disc worn or damaged.
2. Rubber drive disc is not tracking properly on
1. Replace drive disc.
2. Adjust rubber drive disc.
Rider Will Not Move
Loss Of Traction
drive disc.
3. Tapered axle bolt and nut missing.
4. Axle bearing seized.
5. Insufficient lubrication in chain case or
transmission/differential.
3. Replace with SNAPPER tapered bolt & nut.
4. Contact authorized SNAPPER dealer.
5. Contact authorized SNAPPER dealer.
1. Blade engagement lever in the “OFF” position.
2. Mower belt slipping.
3. Cutting blade is dull, worn or damaged.
1. Uneven tire pressure.
1. Move lever to the “ON” position.
2. Adjust or replace mower belt.
3. Sharpen or replace cutting blade.
1. Bring to proper pressure. 12 PSI front tire
& 12 PSI rear tire.
Blade(s) Not Cutting
Cutting Grass
Improperly
2. Cutting height too low or high.
3. Engine speed too slow.
4. Forward speed too fast.
2. Adjust cutting height.
3. Move throttle control to “FAST” position.
4. Move transmission shift lever to a slower
speed.
5. Terraced cut, side to side.
6. Excessive deck pitch, front to rear.
7. Cutting blade(s) dull or damaged.
8. Mower belt slipping.
5. Adjust side to side level
6. Adjust front to rear pitch.
7. Sharpen cutting edges or replace blade(s).
8. Adjust tension or replace mower belt.
1. Engine speed too slow.
2. Forward speed too fast.
1. Move throttle control to “FAST” position.
2. Move transmission shift lever to a slower
speed.
Poor Grass
Discharge
3. Grass is wet.
3. Mow when grass is dry.
4. Excessively dull, worn or damaged blade(s).
5. Build up of grass clippings and debris under
deck.
4. Service mower blade
5. Clean the underside of deck.
6. Improper blade installed on deck.
6. Install proper SNAPPER blades.
1. Leaking chain case or differential plugs.
1. Verify plugs are not cracked & are in good
shape. Check gaskets.
Oil Leaking
2. Leaking engine block.
2. Contact authorized SNAPPER dealer.
28
MAINTENANCE SCHEDULE
EACH
USE
5
25
50
100
EACH
SUBJECT
Engine
SERVICE
TO BE PERFORMED
Check Oil Level
REFERENCE
PAGES
Page 6
HOURS HOURS
HOURS HOURS SEASON
X
Engine
Initial Oil Change
Page 13
X
Engine
Periodic Oil Change
Page 13
X*
Air Pre-Cleaner
Service Sponge Pre-
Cleaner Element
Replace Element
Engine Manual
X**
X**
Air Cleaner
Spark Plug
Fuel Filter
Engine Manual.
Engine Manual.
Page 17
Replace Plugs
Replace Filter
X
X
Engine Cooling
System
Clean Shrouds & Fins Engine Manual
X**
Battery
Check Electrolyte
Charge Battery
Check Pressures
Page 25
X
X
X
Battery
Tires
Page 24 & 25
Page 6
X
X
Drive Belts
Check For Wear And
Tension
Check For Wear And
Damage
Clean Debris
Accumulation
Grease or Oil
Pages 14, 18, 23
X
X
X
X
X
Mower Blades
Mower Deck
Pages 22
Page 15
X
X
Lubrication Points
Pages 15 & 16
Pages 16
Lubricate Chain Case Check Grease Level
& Transmission
Blade Brake
X
X
X
X
Check blade stopping Pages 14 & 19
for proper operation
X
X
X
Stopping Time
Clutch/Brake System Check Clutch/Brake for Page 14 & 21
proper operation
Reverse Lockout
Mechanism
Check function.
Page 6 & 14
X
Interlock System
Check function
Page 14
X
*Change oil every 25 hours when operating under heavy load or high temperatures.
**Clean more often under dusty conditions or when air debris is present
29
MAINTENANCE/REPLACEMENT PARTS
MAINTENANCE PARTS
Engine Speed Control (Briggs Engine)
Clutch/Brake Cable
Brake Cable
2-4155
2-9913
2-2344
7-3216
3-5619
1-9518
1-6967
2-9143
3-5635
1-9515
1-6980
2-6453
N/A
1-8069
2-6565
6-0480
6-0735
2-2252
5-3103
06073
Reverse Lockout Mechanism
25” Cutter Blade (Standard - Not Air Lift Compatible)
25” Cutter Blade (Standard - Air Lift Compatible)
25” Cutter Blade (Mulching)
25” Cutter Blade (Ninja - Quad Edge)
28” Cutter Blade (Standard - Not Air Lift Compatible)
28” Cutter Blade (Standard - Air Lift Compatible)
28” Cutter Blade (Mulching)
28” Cutter Blade (Ninja - Quad Edge)
30” Cutter Blade (Standard - Not Air Lift Compatible)
30” Cutter Blade (Standard - Air Lift Compatible)
30” Cutter Blade (Ninja - Quad Edge)
Air Lift Kit (25” & 28” Decks)
Air Lift Kit (30” Decks)
Engine to Cutting Deck Belt
Rubber Drive Disc
Parts Manual for Rear Engine Rider Series 17 & 19
30
3 YEAR LIMITED WARRANTY
For three (3) years from purchase date for the original purchaser's residential, non-commercial use, SNAPPER, through
any authorized SNAPPER dealer will replace, free of charge (except for taxes where applicable), any part or parts found
upon examination by the factory at McDonough, Georgia, to be defective in material or workmanship or both.
For ninety (90) days from purchase date for the original purchaser's commercial, rental, or other non-residential use,
SNAPPER, through any authorized SNAPPER dealer will replace, free of charge, any part or parts found upon
examination by the factory at McDonough, Georgia, to be defective in material or workmanship or both.
All transportation costs incurred by the purchaser in submitting material to an authorized SNAPPER dealer for
replacement under this warranty must be paid by the purchaser.
This warranty does not apply to engines and their components, and batteries, as these items are warranted separately.
This warranty does not apply to parts that have been damaged by accident, alteration, abuse, improper lubrication,
normal wear, or other cause beyond the control of SNAPPER. This warranty does not cover any machine or component
part that has been altered or modified changing safety, performance, or durability.
Batteries have a one (1) year prorated warranty period with free replacement if required during the first ninety (90) days
from the original purchase date. SNAPPER will not be responsible for any installation cost incurred. The battery warranty
only covers original equipment batteries and does not cover damage to the battery or machine caused by neglect or
abuse, destruction by fire, explosion, freezing, overcharging, improper maintenance, or use of improper electrolyte.
There is no other express warranty.
DISCLAIMER OF WARRANTY
Implied warranties, including those of merchantability and fitness for a particular purpose, are limited to three
(3) years from purchase date for the original purchaser's residential or other non-commercial use, and ninety
(90) days from purchase for the original purchaser's commercial, rental or other non-residential use, and to the
extent permitted by law, any and all implied warranties are excluded. This is the exclusive remedy. Liabilities for
consequential damages, under any and all warranties are excluded.
Some states do not allow limitations on how long an implied warranty lasts, or do not allow the exclusion or
limitation of incidental or consequential damages, so the above limitation or exclusion may not apply to you.
This warranty gives you specific legal rights, and you may also have other rights which vary from state to state.
WARNING: THE USE OF REPLACEMENT PARTS OTHER THAN GENUINE SNAPPER PARTS MAY IMPAIR THE
SAFETY OF SNAPPER PRODUCTS AND WILL VOID ANY LIABILITY AND WARRANTY BY SNAPPER
ASSOCIATED WITH THE USE OF SUCH PARTS.
IMPORTANT: Please fill out the attached SNAPPER Product Registration Card immediately and mail to:
Snapper’s Product Registration Center, P.O. Box 1379, McDonough, Georgia 30253
31
PRIMARY MAINTENANCE
32
PRIMARY MAINTENANCE
33
PRIMARY MAINTENANCE
34
PRIMARY MAINTENANCE
35
Safety Instructions & Operator’s Manual for
REAR ENGINE RIDING MOWER
SERIES 21
IMPORTANT
Snapper products are built using engines that meet or exceed all applicable emissions requirements on the
date manufactured. The labels on those engines contain very important emissions information and critical
safety warnings. Read, Understand, and Follow all warnings and instructions in this manual, the engine
manual, and on the machine, engine and attachments. If you have any questions about your Snapper product,
contact your local authorized Snapper dealer or contact Snapper Customer Service at Snapper, McDonough,
GA. 30253. Phone: (1-800-935-2967).
WARNING
BATTERY POSTS, TERMINALS AND RELATED ACCESSORIES CONTAIN LEAD AND LEAD COMPOUNDS,
CHEMICALS KNOWN TO THE STATE OF CALIFORNIA TO CAUSE CANCER AND BIRTH DEFECTS OR OTHER
REPRODUCTIVE HARM. WASH HANDS AFTER HANDLING.
WARNING
ENGINE EXHAUST, SOME OF ITS CONSTITUENTS, AND CERTAIN VEHICLE COMPONENTS CONTAIN OR EMIT
CHEMICALS KNOWN TO THE STATE OF CALIFORNIA TO CAUSE CANCER OR OTHER REPRODUCTIVE HARM.
COPYRIGHT © 2000
SNAPPER INC.
ALL RIGHTS RESERVED
MANUAL No. 7-4023 (I.R. 9/19/00)
36
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