SNAPPER LTD Series 0 lawn tractor Service Manual

Service Manual for
— LTD SERIESO
LAWN TRACTORS &
MOWER ATTACHMENTS
SNAPPER POWER EQUIPMENT E/I |euáva (IR 8/90) MANUAL #07218
McDonough, GA. 30253 U.S.A +. Ш Company
INTRODUCTION
> This manual covers the SNAPPER LTD Series Lawn Tractors & Mower Attachments.
"TOOL REQUIREMENTS:. The normal complement of U.S. Standard tools found in most repair shops are all
that will normally be needed to repair SNAPPER Lawn Tractors. Several special tools are available to aid
in pulling wheel hubs and drive dis¢s. Refer to the parts manuals for these tools and for correct replacement
parts for the particular model series being repaired.
CONTENTS: This manual contains six sections. The first section covers some of the routine operational
service and adjustment information as found in the operator's manual which accompanies each unit. This
information is repeated here for general reference only. Refer to the appropriate Operator's Manual for
specific details. The sections are listed below.
TABLE OF CONTENTS
Section | - OPERATION 8 ROUTINE SERVICE............................ 2.0 erre rene nero erereeos .4-18
INTRODUCTIÓN.......... en... ener ere er ecen eee rernerenreer recen ore enero ecarrre reee ranrenereceneareeo 4
NOMENCLATURE..................... steerer estes teeters sere sate saress ease sense anes sens saes 4
BEFORE OPERATINC:.................. enero reee ener recrea eee enereereieereee rear reeento. 5
STOPPING.…..….……rccisrrssresrcaseseensensrssacesrererereseenseranennaenanersecen mena seen srenn caen Bon rraee sa se care canea canne nas a rennes 5
PRE-START CHECK LIST......................e.eeerereecer e Deeecre nee ERBE eran reee cree 5
STARTING 8 OPERATING........................ieieei rene ere ere cercare cerrar raeLes 6
TO START MOTION... seers ener ner reee enerereraeererce o reee errar 6
TO STOP MOTIÓN.........e..e..neenmneenaneo nen encen icono enecaca cen ooeeneeea rre rene reno reee recen renacere rar neeeeeeo 6
TO SET PARKING BRAKE........................ EEE e ercer reee ee eee 6
TO ROLL MACHINE.....................reinnn nee earn erronea re ere cere ore enececarerereeeerereeeerecer ene eees 6
TO ADJUST OPERATOR'S SEA Terre estes IR e ee e eee Dee 6-7
TO OPERATE MOWER....................e... 2.00 eee ne reire erecto reee e eee 7
TO ADJUST CUTTING HEIGHT....................ee.eeeecer e DD ee e eee ere re nereceee nene enranenn sente 7
TO START MOWER BLADE....................... ercer ere reee ee e eee eee oros 7
TO BE ABLE TO GET OFF MOWER AND LEAVE ENGINE RUNNING............... eee eee, 7
DRAINING ENGINE OIL....................... NE 8
MAINTENANCE 8 LUBRICATION SCHEDULE.................ervrcceceren ne ee PT 8
END OF EACH SEASON (OR EVERY 100 HOURS).....……………rcerrearerscecerncrncesecanreneenereane serres 9
FUEL SYSTEM SERVIC Besserer rer eects eee re erre reee seen. 9
BATTERY SERVICE...................mreccemmnes pencacacaroneuoeono sano e rueneecacacenca rar enrereacacos rooorareionarerene nenes ......9
BATTERY CHARGING................2.. 00m e eee eee esse e eee es sete eee eases. 10
TO ADJUST TIRE PRESSURE.....................eneneeenenn RR De Dee ce 10
DRIVEN DISC SERVICE....................e.ecererenem e eee eee ee eee eee nena 10
WHEEL BRAKE TEST 8 READJUSTMENT................e.eeereve ie Dei Dee 10
MOWER DRIVE BELT ADJUSTMENT (33")..................er.cecerec ere DDR OR DR e es 10-11
MOWER DRIVE BELT ADJUSTMENT (41'3................... 20000 reee re De e ener 11
MOWER DRIVE BELT SERVICE (33")......:..............eemmi ne enero erre erre racer 11-12
MOWER DRIVE BELT SERVICE (41")........................ een e eee aaa ees 12
MOWER SERVICE 8: ADJUSTMENTS....................m 0 nee ee e eee cree 12
BLADE BRAKE ADJUSTMENT..................emeennicne e es errr cree 12-13
CUTTING BLADE SERVICE...................e.eeemrnee mee ee errar ree ener rene ire nee 13
REMOVING 8 INSTALLING MOWER..............eenrceennen eri re reeren ee eee eee 13-14
HOOD REMOVAL................meneeneoneon encarece e ease sees e esses eset ee sent one. 14
ADJUSTING STEERING......…………cosseessereserensenrernsrrasren sera nrenrensarensenan seen sente cesner rame recense rare rae san aan 14
LEVELING MOWER (33"3.........................eeeecmecere reee re er eee rre ree ere ener eee 15
LEVELING MOWER (41").......….………vrorrrererrerrenrrerrenrarencestensensasere ne rrrnena sera pen peste te race ca nee cernes 16
DRIVE BELT SERVICE …..…..…..………erresrenierncenensrererrarenrensessenserasnnen camera nena see car enea eee eee 17-18
TRACTION LOSS ADJUSTMENT .......…….….crrercrarerensecrerrrensensrn are neanrensersees area era eee eee 18
Section II - TROUBLESHOOTING........................ e... e ee e eee ree ene Dee 19-21
TROUBLESHOOTING CHART.................... e. ere0rri cz DR RD De Deere ere nereceee ene 19-20
MOWING GUIDE..................erencenn nee ree een ee r rn Rare ere er erre ene nreree cercana ceo recererareeees 20
== eects teeta eee atest eee e terete eee 20
BEL TS. reee ecenrenenenenenee neon rie rene eerroerereerene een vere eee erre recenreneeL erre reeeareae reee ene eeeAs 20
BLADE TO GROUND...............emn.cenceeiiecre enero er eee erre rear reee eee erre er redr eee ceros 21
TIRES o.oo eee teeta steer eee eee ates sates esses esos senses 21
TROUBLESHOOTING CUTTING PROBLEMS MOWING GUIDE....................e.evemi 21
i +
Section l= CUTTER UNITS... sn sss 22-25
~ INTRODUCTIÓN......e....ererccccraceseeorsacoo caer coracon reee receceaeoceceeorocecce. eorereneraaeorenoarenreroene e rereceoee 22-24
BRAKE BAND REPLACEMENT...............ecorccccceres PEER EEE EEE EEE 24
CUTTING BLADE(S) .…...….…..….…..…sesecsernaneassancencnns Peel enecenebeonearanrooraarr a rareconere en rrreneo core enereeceoreeemes 24
AIR LIFTERS................e.eicczcoorerrce occ eoeereececacaceecene er eeecere rece rrecaceee eran eeeanaccevenanrenenenecarrerececenees 24
BLADE STRAIGHTNESS CHECK...............e.erereseececocceneoonococacerienreveeenvecocece no eerere er rarer cocer. 24-25
PROCEDURE FOR STRAIGHTENING BLADE...............eeeosrcccocccoororeorenearzcocecceneenes Kerr EE RER EEEE REES 25
BLADE 8: SPINDLE ALIGNMENT..............eeecnccccoccececcencacneraveoeorenaaaeceneconeneneranacecones barsscsecsnnanenae cena 0e 25
Section IV - TRANSMISSION 8 DRIVE SYSTEM.................e..eeeeeerrsrcccoccccceorooorrrarancaconocovtcarnarenee ree reneeee e 26-38
INTRODUCTION... …crrrrrrsnsrener area naanrerenerasanaa cran an sanencara sa one rerereeeccerer o rrrecerc ene earercenereneee 26-27
ADJUSTING SHIFT DETENT.. neraronooeraaaao eee areNeavevenerearerrecouceneaecenerrnareracearenancantatecenaveeencecenmene 28-29
DRIVE DISC REPLACEMENT ...............eeeercccccccoccreriecerccucarsacunancercareooeeoranaaaceemenerera ooo carre ooo 29
DRIVE DISC REMOVAL..................e.esrecerscercecreceocococeceecenereacarereeoerra re aoceneaoce rete rece recrean. 29-30
DRIVEN DISC REPLACEMENT................eereccerceooorecceceeicacarareeonoeeeeeeecocerererentecenernerenooeoranceaee 30-31
TRANSMISSION SHIFTER-.DISASSEMBLY ................ccemneoo TO eneecencarenareconee. 31-32
DIFFERENTIAL DISASSEMBLY 8 REPAIR........................eeccccrorceocceroecosrerereecconeocterrenene no reree.e 32-38
PRIMARY CHAIN CASE DISASSEMBLY PROCEDURE..............e.e..seccccoomeeiiii Di EEE 38
Section V - FRONT AXLE 8: STEERING REPAIR............................e=eeemeeiercereeieecocer e nece eee eee. 39-44
INTRODUCTIÓN................ececicecioccoo enero ne cccen ear aceneeter ren recaeecaceeoen eee. eneceooorenvecenenceronreveneaceee men. 39
FRONT WHEEL & BEARING REPLACEMENT..................eeossccccccerecerececeoocrrereneaceccenvenerrer narran 40
SPINDLE 8: BEARING REPLACEMENT..........eee.e.nmeveeucceoceceen—. euerececcoceoororeneenecere Te verercacereenT reee. 40
STEERING SHAFT & SECTOR ASSEMBLY ............... eneneaneonecorecace ene eeen eee cierren reee 41-43
TIE ROD 8 BALL JOINT REPLACEMENT................escococcorcorerenceeernee eeoococariacecerecoceretceacaeea reee. 44
DRAG LINK REPLACEMENT 8 ADJUSTMENT.................erecrreeiericecereer erre e nee De 44
FRONT AXLE REPLACEMENT........ ereeroreroarecareneronaoarorecenene O ‚....44
Section VI - ELECTRICAL ..............eeconerconercirrer eee eee e race e eee e eee ene oo onercencararecenrerereencavarene 45-50
INTRODUCTION...........e....eeccccccececereceeorrenareare ever ereaeiecornenearoenenaaeaeeceavceverrraneaeececocer er rrenceceneranACeOe 45
PRELIMINARY CHECKS................eeocrceonecaracccercorarcececencencacenvonerenaeeeoconarereraneceaeaeocarereneneccanrereteceee e 46
ENGINE FAILS TO START ...................rececerccccocereracenenorveca eeeeocoveneroreareaaarereeoeerer rare. penceoonenevon. 46
GROUNDING OF THE ELECTRICAL SYSTEM U reeeeeeereseeeeeeenenenehnnnnnenernseeneseesr meer ees 46
ELECTRICAL SYSTEM COM PONENT eevereeeeeernrna, ERREREERRRREEEEERRRARRAEEREBRREREERLKARRERRRARUNEUREEERREKETEM 47-49
BATTERY.......... eoeorrenorancen ooo ooteceooraccoeoorcenenene eeeenoooreoarereeneocrnverenocereccenenorcanreeee pnccenonraroooconeneaneme. 49-51
| SAFETY FIRST!
Most major service procedures on the SNAPPER LTD Serles Lawn Tractors & Mower Attachments
require that the tractor be stood on its rear bumpers for extended periods of time. This being the case, it is
¡imperative that the following SAFETY PRECAUTIONS be adhered to:
FUEL TANK: DRAIN FUEL FROM TANK, CLOSE FUEL SHUT-OFF VALVE(S) & CLOSE VENT ÓN
FUEL FILLER CAP BY TURNING CLOCKWISE.
SPARK PLUG: DISCONNECT SPARK PLUG WIRE.
BATTERY: TURN IGNITION KEYSWITCH "OFF" AND REMOVE KEY. DISCONNECT POSITIVE
(+) CABLE FIRST, THEN NEGATIVE (-) CABLE FROM BATTERY. REMOVE BATTERY
AND STORE IN A PLACE THAT IS COOL, DRY AND WELL VENTILATED.
Aways wear SAFETY GLASSES when compressing or extending springs, or when using a hammer and drift
pin to remove locking collars, drive disc or other components. Use SAFETY GLASSES when pressing
| bearings IN or OUT. Always wear PROTECTIVE GLOVES when handling sharpened blades.
Ee
© Copyright 1990 by SNAPPER POWER EQUIPMENT. Printed in United States of America. All rights reserved. Reproduction or use, without express
~ permission, of editorial or pictorial content, in any manner is prohibited. |
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—— IMPLEMENT
SEAT ADJUSTMENT —— LIFT LEVER
KNOB (Not Shown) FT LEVER
RELEASE BUTTON
GROUND In не CONTROL PANEL
SPEED TTT Ч 7 —— (SEE FIGURE 2)
CER UD KK FUEL TANK & BATTERY
No DE (UNDER HOOD)
\ KIT == = | Le CLUTCH/BRAKE PEDAL
St = LL (NOT SHOWN)
Le. — TILTING
MOWER Wn = HOOD
)
REAR TIRES = A X iD
(10 PSI) | EZ >
т NN ZN |
SL 6 > E Za Ä
= A ENGINE COMPONENTS
NOT SHOWN:
e AIR CLEANER
e MUFFLER
e SPARK PLUG
DEFLECTOR | e FUEL FILTER
CHUTE
FRONT TIRES
MOWER —— (12 PSI)
DECK
MUFFLER
DECK ROLLER — HEAT SHIELD
— BLADE BRAKE
ADJUSTMENT
FIGURE 1
INTRODUCTION NOMENCLATURE
This manual has been prepared for the operators of the
SNAPPER LTD Series LAWN TRACTOR.
Its purpose, aside from recommending operating and
routine service requirements, is to promote safety
through the use of accepted operating practices. READ,
UNDERSTAND AND FOLLOW the safety
precautions on page
messages on the tractor and attachments before oper-
. ating the machine.
2 of this manual and all safety
nate un $
CEET ra POCA CD A
The nomenclature drawing above (Figure 1) shows the
essential parts of the SNAPPER LTD Series LAWN
TRACTOR. lt is recommended that all operators of this
equipment become thoroughly familiar with the controls,
parts 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.
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— Section |- OPERATION 8 ROUTINESERVICE
$
BEFORE OPERATING: BLADE CONTROL
Be thoroughly familiar with all controls and how to use LEVER
them before operating your mower. Know beforehand
how to stop the engine, wheel drive and mower blade in
preparation for possible emergencies.
STOPPING
ENGINE: STOP ENGINE by turning the KEYSWITCH to =
"OFF". See Figure 2. CI
"ON"
va
- ОЫ ый
FIGURE 4
PRE-START CHECK LIST
Make the following checks and perform the service as
required before each start up.
e CHECK TIRES and add air as needed to bring
THROTTLE > — KEYSWITCH pressure to 12 psi in front and 10 psi in rear tires.
a | e CHECK GUARDS, DEFLECTORS 8 COVERS to
FIGURE 2 make sure all are in place and securely tightened.
e HECK BLADE CONTROL to insure it works freely.
WHEEL DRIVE: STOP FORWARD MOTION of mower © insure NW y
| №
by pushing Clutch/Brake pedal all the way down. See OFF to stop blade”. moved manually from ON to
Figure 3.
о CLEAN EXTERIOR SURFACES of cutting deck and
TT | - engine of any accumulation of dirt, grass, oil, etc.
| Keep engine air intake screens and cooling fins
| clear at all times.
/ * RE-ADJUST SEAT as needed to most comfortable
| © | / position. (Refer to Pages 5 & 6, Figure 8)
о CHECK ENGINE OIL and add oil as needed to bring
CLUTCH/BRAKE J / level up to (but not over) the full mark. (Refer to
PEDAL | A engine manual for oil specifications).
К / ADD FUEL to tank after pushing the mower outside
| where fumes can be dissipated. Make sure cap is
tightened after refueling. (Refer to engine manual
for fuel specifications). See Figure 5.
\ Nd
KEEP RED BOOT OVER -
POSITIVE TERMINAL
PARKING
BRAKE
LEVER
>
FIGURE 3
MOWER BLADE: STOP MOWER BLADE by pushing
BLADE CONTROL lever downward to "OFF". See
Figure 4.
- Section | - OPERATI ON & ROUT N E SERVICE — ——- Los bn
STARTING & OPERATING
ENGINE: START ENGINE as follows:
1. PUSH BLADE CONTROL LEVER downward to
"OFF" position (Fig. 4) and fully depress the
CLUTCH/BRAKE pedal (Fig. 7), so that Safety
Interlock System will allow engine to start.
2. CHOKE ENGINE for cold starting by moving
THROTTLE CONTROL to "CHOKE" position.
(Little or no choking will be needed when restarting
a warm engine). Refer to Figure 2.
NOTE
THE SEAT INTERLOCK FUNCTIONS TO SHUT
OFF THE ENGINE IN THE EVENT THE OPERA-
TOR VACATES THE SEAT WITH THE TRACTION
DRIVE ENGAGED AND/OR THE MOWER BLADE
ENGAGED. IN THE EVENT OF AN INTERLOCK
MALFUNCTION, DO NOT OPERATE THE TRAC-
TOR UNTIL THE CONDITION IS CORRECTED.
SPEED
‘SELECTOR
SHIFTER
RIGHT SIDE
SHOWN
ta
— |
3. Insert key in ENGINE IGNITION switch, turn key to
"START" position to crank engine and hold until
engine starts then release.
NOTE
LIMIT CRANKING INTERVALS TO FIVE
SECONDS DURATION TO PREVENT
OVERHEATING OF STARTING MOTOR
AND/OR DEPLETION OF BATTERY ENERGY.
NORMALLY, FIVE SECONDS IS SUFFICIENT
CRANKING TIME FOR STARTING. IF THIS
TIME IS EXCEEDED, LOCATE AND COR-
‘RECT CAUSE OF STARTING PROBLEM.
4. WARM-UP ENGINE momentarily, then move the
THROTTLE CONTROL downward out of CHOKE
position until engine runs smoothly. Set desired
speed. Best cutting and bagging performance is
obtained with engine at or near top speed.
TO START MOTION
After the engine has been started and is running
smoothly, proceed as follows to start forward or
rearward motion.
1. With CLUTCH/BRAKE pedal depressed, shift
SPEED SELECTOR to 1 for forward or R for reverse
and release pedal. (For comfort and safety, always
shift back to 1 before starting forward). See
Figure 6.
CAUTION
AVOID UPHILL STARTS. IF MACHINE IS
STOPPED GOING UP SLOPE, PUSH
BLADE CONTROL LEVER DOWNWARD
TO "OFF" POSITION AND BACK SLOWLY
DOWN SLOPE. IF UPHILL START MUST BE
MADE, PUSH BLADE CONTROL LEVER
DOWNWARD TO "OFF" AND SET THROTTLE
AT HALF SPEED.
FIGURE 6
TO STOP MOTION
Push CLUTCH/BRAKE PEDAL all the way down to
stop forward or rearward motion.
TO SET PARKING BRAKE
Depress CLUTCH/BRAKE PEDAL. Pull PARKING
BRAKE LEVER "UP" while releasing pedal. See
Figure 7.
/,
| UP.
~ BRAKE
| PULL PARKING
DEPRESSED J BRAKE LEVER
FIGURE 7
Push CLUTCH/BRAKE PEDAL down to release PARK-
ING BRAKE.
TO ROLL MACHINE
Shift SPEED SELECTOR to "N" position or hold
CLUTCH/BRAKE PEDAL half down.
TO ADJUST OPERATOR'S SEAT
FORE & AFT ADJUSTMENT: With machine
- 8 oped, Ioogen the ADJUSTING KNOB on seat ———|- —
- s e cti ion | = О P E R ATI o N & R O U т № Е S E R \/ | С Е — = ee mes comes == mes
‘support "Sit in operators seat and, while depressing
the CLUTCH/BRAKE PEDAL, slide the seat forward
or rearward to the most comfortable position,
then lock in position by tightening ADJUSTING KNOB.
See Figure 8.
SEAT
\ Г
’ 8 Wr SEAT SWITCH
ADJUSTING
KNOB
FIGURE 8
TO OPERATE MOWER
During transport or for clearance through gates it may
become necessary to raise the DISCHARGE DE-
FLECTOR. Reinstall the wing nuts on the studs when
the DEFLECTOR is raised so they will not be lost. Be
sure to lower the DEFLECTOR and clamp it securely
down with the wing nuts before mowing. See Figure 9.
7
DEFLECTOR
FIGURE 9
TO ADJUST CUTTING HEIGHT
The cutting height can be changed to any one of nine
- positions by raising or lowering the cutting deck attach- +
. ment with the IMPLEMENT LIFT LEVER as shownin__
Figure 10.
:
PO у = | enon
8
8
5
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=
Zona ESS виттой/
то REPOSITION |
LOWEST ———-
CUT
—
SNAP;
NINE POSITION
1 TO 4 INCH CUT
pe
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\ IMPLEMENT A
FIGURE 10
To suit mowing conditions, experiment by increasing
engine speed and/or decreasing driving speed until
smoothest cut is obtained without Placing engine under
heavy strain.
TO START MOWER BLADE
START MOWER BLADE by pulling BLADE
CONTROL LEVER "UP" to "ON". See Figure 10A.
FREE ren
FIGURE 10A
TO BE ABLE TO GET OFF MOWER
AND LEAVE ENGINE RUNNING:
1. Push BRAKE all way down.
2. Set PARKING BRAKE.
3. Push BLADE CONTROL LEVER downward to
"OFF" position. Refer to Figure 10A.
aviva MMA ASSET NON NE
_ Section | - OPERATION 8: ROUTINE SERVICE
To retain the quality of your tractor, use Genuine
SNAPPER Replacement Parts only. Contact your local
SNAPPER Dealer for parts and service assistance. For
the correct part or information for your particular mower,
always mention model and serial number. We reco-
mmend returning the tractor to an authorized SNAPPER
Dealer on a yearly basis for inspection and addition of
any new devices which might upgrade the safety of your
mower. For the nearest SNAPPER Dealer, check the
yellow pages under the heading LAWN MOWERS. For
engine parts and service, look for the engine manufact-
urer's dealers under the heading ENGINES-gasoline.
DRAINING ENGINE OIL
NOTE
RAISE HOOD. IT MAY BE MORE CONVEN-
IENT TO REMOVE HOOD FOR EASIER
ACCESS WHEN FILLING WITH OIL. SEE
"HOOD REMOVAL", PAGE 12.
ND —
Disconnect spark plug wire.
Fashion an oil drain trough from metal or cardboard
as shown in Figure 11.
1” G- BEND UP 90° AT CENTER | |
4 TO 6 INCHES ——————
FIGURE 11
3. Loosen oil drain plug. Place trough under plug.
Place a flat container (2 gt. Min. Capacity) beneath
end of oil drain trough.
NOTE
TO ACHIEVE PROPER OIL DRAINAGE,
IT MAY BE NECESSARY TO PLACE
BLOCKS UNDER LEFT WHEELS OF MOWER.
4. Loosen oil till cap and remove oil drain plug. Allow
engine oil to drain completely. See Figure 12.
| |
8.
REMOVE
«a OIL PLUG
OIL
DRAIN
TROUGH
| LOOSEN OIL FILL CAP |
FIGURE 12
À
5. Reinstall oil plug, remove fill cap and refill crankcase
with oil. Reter to the Engine Owner's Manual for .
engine oil specifications.
ns CY
#
SAAS ma patates
MAINTENANCE & LUBRICATION
SCHEDULE
Refer to the Engine Owner's Manual for service speci-
fications on the engine itself. The following applies
primarily to the tractor and optional mower attachments.
Clean fittings before greasing.
FIRST 5 HOURS (NEW UNIT)
» ENGINE: Change oil in crankcase. Refer to
Engine Owner's Manual, and Draining Engine
Qil on this page.
e TRACTOR: Check all fasteners and retighten as
needed.
EVERY 25 OPERATING HOURS
« FRONT WHEEL BEARINGS: Lubricate bear-
ings through the fitting on hub of front wheels.
See Figure 13.
BEARING
FITTING
FIGURE 13
* REAR LEFT AXLE BEARING: Lubricate through
fitting with 2 shots of bearing grease. Right
hand bearing is lubricated by transmission.
о FRONT AXLE PIVOT & SPINDLE BUSHINGS:
Lubricate the center pivot fitting on underside
of the front axie and each spindle fitting located
on rear of front axle (toward operator). See
Figure 14. (Continued on next page)
ST
FRONT AXLE NÉ de
PIVOT FITTING
— SPINDLE
BUSHING
> FITTING
FIGURE 14
“ Section | - OPERATION & ROU
о CHANGE OIL IN ENGINE CRANKCASE with oil
of weight and grade specified in Engine Owner's
Manual.
e ENGINE AIR CLEANER: Refer to Engine Own-
er's Manual for details.
END OF EACH SEASON
(OR EVERY 100 HOURS)
о TRANSMISSION DIFFERENTIAL: Remove
rear panel or fender seat pan to gain access
to differential. See Figure 15.
e TO REMOVE REAR PANEL:
1. Remove six (6) screws.
2. Remove REAR PANEL.
о TO REMOVE FENDER SEAT PAN:
Remove shift handle knob.
Disconnect wires to seat switch.
Remove four (4) top screws.
Remove two (2) lower fender screws.
Remove FENDER SEAT PAN from
mower. —
aan
REMOVE FOUR
TOP SCREWS
REMOVE TWO LOWER
FENDER SCREWS FENDER SEAT PAN
FIGURE 15
* Remove CHECK PLUG on inside of unit shown
in Figure 16 to check level of oil. Add
SNAPPER "O" grease as needed thru upper
fill hole to bring the level up to the lower edge of
the CHECK PLUG HOLE, Reinstall NEW plugs
after servicing.
* CHAIN CASE: Remove plug and check. If dry,
add one ounce of SNAPPER "0" grease - do
not overfill. Total capacity must not exceed 2
ounces. |
$
$
i *
KA .
$ »
„IN DS
PLUG
CORRECT
LUBE
LEVEL
FIGURE 16
« MOWER ATTACHMENT SPINDLE(S):
Lubricate fitting for BLADE SPINDLE BEARINGS
with two shots only of bearing grease once each
year.
SERVICE Engine air cleaner element and spark
plug.
e SERVICE FUEL FILTER as instructed below.
FUEL SYSTEM SERVICE
Check the in-line fuel filter at frequent intervals and
replace before the screen becomes clogged with sedi-
ment. Make sure the replacement is correctly installed
with IN marking toward the tank and OUT toward the
engine. Check the fuel system components fre-
quently and replace any parts showing worn spots or
cracks. See Figure 17.
(y
TOWARD
ENGINE
>
FIGURE 17
BATTERY SERVICE
Check the battery once each month. Remove the caps
and add distilled water as necessary to bring the level of
the electrolyte up to about 3/32" over plates in each cell.
DO NOT FILL TO THE RINGS. Carefully reinstall
battery caps. In freezing weather, charge the battery
after adding water to thoroughly mix the water in the
electolyte. Keep the terminals and straps clean and tight
and make sure the red boot (shown in figure 5) remains
in position over the positive terminals. Always
TOWARD
FUEL TANK
. disconnect negative (-) terminal first and reconnect last! :.....
Section | - OPERATION & ROUTINE SERVICE
BATTERY CHARGING
The engine is equipped with a flywheel alternator to
charge the battery. If the tractor is not run regularly,
connect the battery to a charger monthly to maintain the
specific gravity at 1.250 or higher. if this reading falls
below 1.175, the battery liquid may freeze when temp-
eratures drop to around zero degrees F.
To charge, connect per instructions furnished with
charger. if time allows, slow charge at 1 amp for ten
hours or as an alternate, fast charge at 3 amps for four
hours. Observe all precautions while charging.
TO ADJUST TIRE PRESSURE
Check tire pressure at frequent intervals. A low tire on
one side causes uneven mowing. Pressure in front
tires should be maintained at 12 psi while rear tire
pressure should be 10 psi.
DRIVEN DISC SERVICE
If the drive does not engage after extended use, t may
be that the driven disc is excessively worn and is not
contacting the drive disc. The driven disc must be
replaced if the rubber is worn down to 1/18" above the
metal. Replace the rubber driven disc when excessively
worn or unevenly worn. To replace, remove the rear
cover plate, shift the drive into neutral, remove the four
nuts from the hub, remove the old disc and replace it with
new disc (see Figure 18). Refer to Page 15 for
TRACTION LOSS ADJUSTMENT procedure.
DRIVEN
DISC
FIGURE 18
WHEEL BRAKE TEST & READJUSTMENT
1. Test the wheel braking action at frequent intervals to
insure proper stopping in the event of poss-
ible emergencies. Normally, the mower should stop
from top forward speed within approximately three
feet after the CLUTCH/BRAKE pedal has been fully
depressed.
2. To adjust the braking action:
Loosen Locknut and adjust the cable housing toward
the rear of the mower to increase cable tension. See
Figure 19.
10
IMPLEMENT
LIFT CONTROL.
Là
|;
TO CLUTCH/BRAKE PEDAL
PARKING BRAKE
it CONTROL ROD
SHORTEN FITTING
TO INCREASE CABLE
TENSION. LENGTHEN
TO DECREASE.
_ REAR LIFT
ARM
3.
CAUTION
MOWER I$ NOT
INTENDED TO BE
$TOOD ON END!
PRIMARY CHAIN
CASE
BRAKE
RETURN SPRING NOTE:
MOWER DECK SHOWN
REMOVED POR CLANTY
FIGURE 19
After adjusting, put the Speed Selecting lever in
sixth (6th) position. Depress the CLUTCH/BRAKE
pedal slowly as you roll the mower. There should be
a place where the CLUTCH is disengaged and the
brakes not yet applied, allowing the machine to roll.
This should occur in the first half of the pedal travel.
4. Retest braking action as described in Step 1.
MOWER DRIVE BELT ADJUSTMENT (33")
Normadly,
within the first few hours of operation, the
MOWER DRIVE BELT will seat into the pulleys and be-
come slack. To regain correct belt tension, follow steps
1 thru 5.
1.
2.
3.
Lower MOWER DECK to lowest position.
Push BLADE CONTROL lever downward to
"OFF"
Remove BLADE CABLE spring from hole in
BRAKE ARM. Reattach spring in next hole
forward. See Figure 20. (Continued on next Page)
Section | - OPERATION & ROUTINE SERVICE
— FIQURE 20
4. Remove ROD ENDS from CRANK ARM and
IDLER ARM.
5. INCREASE belt tension by turning ROD ENDS
"OUT". DECREASE tension by running ROD
ENDS "IN".
— 6. Re-attach ROD ENDS and BLADE CABLE
SPRING.
me
PULLEY )
el LK (( |
TENSIÓN
BLADE CABLE
SPRING
NOTE
WHEN INSTALLING BLADE CABLE SPRING,
MAKE SURE SPRING IS ATTACHED IN
FORWARD HOLE OF ARM (REFER TO
FIGURE 20).
7. Pull BLADE CONTROL lever up to "ON"
position, then check belt tension.
8. If beh is still too slack, readjust ROD ENDS as
outlined above.
MOWER DRIVE BELT ADJUSTMENT (41")
Normally, within the first few hours of operation, the
MOWER DRIVE BELT will seat imo the pulleys and be-
come slack. To regain correct bei tension, follow steps
1thru 5.
1. Lower MOWER DECK to lowest position.
2. Push BLADE CONTROL lever downward to
"OFF" position.
3. Remove BLADE CABLE spring from hole in
BRAKE ARM. Reattach spring in next hole
forward. See Figure 20A. |
FIGURE 20A
4. Puli BLADE CONTROL lever up to "ON"
position, then check belt tension.
5. If Delt is still too slack, move spring to another
hole until tension is correct.
MOWER DRIVE BELT SERVICE (33")
To install or replace the MOWER DRIVE BELT, follow
steps 1 thru 4.
1. Lower MOWER DECK to lowest position.
2. Loosen pulley screw on IDLER PULLEY until
BELT RETAINER can be moved away from belt.
See Figure 21.
DAVE BOLT
:
€
ur RETAINER ce
Section | - OPERATION 8 ROUTINE SERVICE
3.
4.
Remove old belt from between BELT RETAINER
and PULLEY and from mower.
install new DRIVE BELT in reverse order. Adjust as
required.
* MOWER DRIVE BELT SERVICE (41")
To install or replace the MOWER DRIVE BELT, follow
steps 1 thru 9.
1.
2.
3.
Lower MOWER DECK 10 lowest positio
Loosen screw on siotted side of bek covers and
_ swing covers away from pulleys.
Loosen pulley screw on stationary IDLER PULLEY
until BELT RETAINER can be moved away from
belt.
Loosen pulley screw on BRAKE ARM IDLER
PULLEY until belt can be removed from between
BELT RETAINER and PULLEY.
Remove old belt.
Route new belt around pulleys as shown in
Figure 21A.
r~ OUTSIDE PULLEY ~— PULLEY —
BELT COVER | SCHW
— OUTSIDE |
| | PULLEY DRAKE ANN
IDLER PULLEY
) retaining screws.
$ outeDE PULLEY
DELTCOVER —
Da
\_ STATIONARY
\\\ IDLER PULLEY
/
/ /
LOOSEN schEW | ours |
AND SWING DELT PULLEY
COVER OUT OF WAY
FIGURE 21A
7. Retighten BRAKE ARM IDLER PULLEY screw.
8. Readjust BELT RETAINER on stationary IDLER
~ PULLEY, then retighten pulley screw.
9. Reinstall belt covers on outside pulieys. Tighten
12
"MOWER SERVICE & ADJUSTMENTS
Keep the topside of the mower free of grass cuttings.
Buildup of clippings could cause belt problems and also
might present potential fire hazard especially when dry.
if uneven cutting is noted, check the tire pressure first
as this is the most common cause. If tire pressure is
correct and uneven cutting persists, move the tractor
to a flat level surface, such as a garage floor, and check
the deck level. (See "LEVELING MOWER", Page 15-16).
To prolong the life and efficiency of your mower, keep
the underside of deck clean and free of accumulated
grass clippings by washing it down with a hose and/or
scraping with a wire brush and scraper. Make sure this
is done at the end of the cutting season before placing
the mower in storage.
BLADE BRAKE ADJUSTMENT
The BLADE BRAKE assembly is designed to stop blade
rotation within 3 seconds after the BLADE CONTROL
lever has been pushed downward to "OFF". Should the
blades not stop within 3 seconds, the BLADE BRAKE
must be adjusted as follows: |
1. Lower deck to lowest position.
2. Push BLADE CONTROL lever doward to "OFF"
position.
3. Loosen retaining nut on R.H. OUTSIDE PULLEY
BELT COVER and swing cover out of way.
4. Inspect BRAKE BAND closely in order to determine
approximate amount of adjustment required.
5. Tighten BRAKE BAND by loosening jam nut and
turning T-nut, on end of eyebolt, clockwise 1 to 2
turns, or until brake band tightens. Make sure
flanged lip on T-nut is positioned vertically to fit
over top edge of anchor. See Figure 22 22.
hy
| 7
N =
NUT
EYE-BOLT
FIGURE 22
NOTE
MAKE SURE THAT BRAKE BAND DOES
NOT DRAG AFTER ADJUSTMENT.
(Continued on next Page)
6. After adjusting BLADE BRAKE, start mower,
~ engage blade and then disengage blade to
check stopping time. Readjust it necessary.
CUTTING BLADE SERVICE
Check at frequent intervals to make sure the blade is
securely tightened and that it is in good condition.
Replace blade if badly chipped, bent, out of balance,
or as soon as notch starts wearing in the tip between
the flat surface and upturned lift as depicted in Figure
23. This type wear pattern occurs more rapidly under
sandy soil conditions.
CAUTION
NEVER OPERATE THE MOWER WITH BLADE
WORN TO THE EXTENT SHOWN IN VIEW C AS
THE TIP COULD FLY OFF CAUSING PERSONAL
INJURY OR PROPERTY DAMAGE.
CUTTING EDGE
WORN
C-DANGEROUS CONDITION!
DO NOT USE ON MOWER!
A DANGER
FIGURE 23
Sharpen blade when the cutting edges become dull if
the blade is in otherwise good condition. When dull,
the grass cut ends will be ragged and usually turn
brown soon after mowing. For best results, remove
the blade and sharpen it on a grinding wheel at an angle
of 22 to 28 degrees. The cutting surface should extend
in about 2 1/2" from the tips. Check the blade after
sharpening to determine that it is still balanced. It will
cause excessive vibration if unbalanced. See Figure 24.
FIGURE 24
*PLUS OR MINUS
3 DEGREES
CAUTION
AVOID CUTTING YOURSELF ON CUTTING
| - BLADE! PROTECT YOUR HANDS FROM CUTS
WHILE HANDLING BLADE.
Install sharpened or replacement blade with compo-
nents in same sequence as removed. Make sure that
the turned-up rims in the center of blade fit over the
edges of the blade drive hub when installing. Do not
substitute any components here. Tighten the blade
retaining capscrew to 20-30 foot pounds torque value.
See Figure 25.
— #1-01% <
21" BLADE > æ
(2 - REQ'D)
#9-0824
CAPSCREW
TORQUE CAPSCREW
20 to 30 A. ibs.
FIGURE 25
REMOVING & INSTALLING MOWER
The mower is attached to the tractor and leveled at the
factory. If the mower is to be removed for cutting blade
service, or to install another attachment, be sure that
the mower settings remain unchanged.
TO REMOVE MOWER:
1. Lower deck to lowest position.
2. Remove hairpin from LIFT BRACKET CABLE clevis
pin. See Figure 26.
FIGURE 26
hed rere BOE
3. Rémove hairpins and washers from REAR LIFT
| ARM CHAINS. See Figure 27. \
CONTROL ROD
REAR LIFT LIFT
ARM STRAIGH]
up
ES OUR
a \
LIFT Фи < 7 1
CHAINS FIGURE 29
) | ) ADJUSTING STEERING
(REAR) XI If steering develops excessive free-play, then the eccen-
XI tric steering bolt must be adjusted. Proceed as follows:
FIGURE 27 1. Working from the left side of the tractor, use a 7/16"
e ДН wrench to loosen nut on top of carriage bolt. See
4. Remove hairpins and clevis pins from FRONT LIFT Figure 30.
ARMS. See Figure 28. 2. Push eccentric clockwise (towards R.H. side of
В tractor) until free-play in steering wheel is minimized.
3. Retighten nut.
LOOSEN
NUT
HAIRPIN
FRONT LIFT
ARM >
FIGURE 28
5. After deck has been lowered to ground, turn
tractor's front wheels to the left and slide the mower
out from the right side. Reverse steps 1 thru 5 to
reinstall mower.
HOOD REMOVAL
To service engine (changing oil, spark plug, etc.). It is
, recommended that the hood be removed. Hood re-
moval is as follows:
1. With hood in closed position, unhook latches at
bottom rear of hood.
2. Disconnect headlight wire at lower left front of
hood. п,
3. With hood level, lift straight up to clear pivot pins
at front front. See Figure 29. |
4. Remove hood and lay aside until maintenance is mt |
completed. Reinstall hood in reverse order... . 14 _ _—
EERE NAA aa
Section | - OPERATION & ROUTINE SERVICE
LEVELING 33” MOWER a
With the blade sharpened and properly aligned, a level _ (4) If required, adjust side-to-side level of
mower deck will insure a clean, even cut. The mower ” mower deck by loosening SHOULDER
should be checked for level as follows: SCREW on side of lift arm ECCENTRIC
1. Check the air pressure in the tires and correct BOLT. See Figure 31. |
pressure as needed (12 psi front and 20 psi rear (5) Turnthe ECCENTRIC BOLT “UP” or
tires). “DOWN” to level deck within 1/8" side-
2. Move the tractor to a smooth, flat and level area to-side.
such as garage floor. (6) When deckis level, tighten SHOULDER
3. Move the lift lever to #5 notch. SCREW.
A. SIDE TO SIDE LEVEL ADJUSTMENT (7) Re-attach CHAINS to REAR LIFT ARMS.
(1) Place a piece of angle iron under center (8) It either CHAIN is slack, adjust EYEBOLT
of deck. See Figure 31. _ until both CHAINS have equal tension.
(2) Pull the pins and remove the CHAINS "Recheck deck level. See Figure 31.
from the REAR LIFT ARMS.
(3) Measure distance between the floor B. FRONT TO REAR LEVEL ADJUSTMENT
and outside center edges of the deck. (1) Measure distance between the floor and the
front and rear edges of the mower deck.
NOTE Measurements should be the same or 1/8"
A DECK IS CONSIDERED LEVEL IF MEASURE- lower at the rear.
MENTS ARE WITHIN 1/8" FROM SIDE-TO-SIDE. (2) Adjust chain EYEBOLTS the same number of
turns to raise or lower rear of
deck. Adjust until deck is properly
leveled.
и
>
~
HAIRPIN SHOULDER
CE № 7 SCREW <
т
ECCENTRIC
FRONT
LIFT ARMS
WASHER
CHAIN
EYEBOLT
ADJUSTING
NUTS
ANGLE IRON
PLACED UNDER
CENTER REAR
OF DECK
В
x
=
=
2
ä
i
5
“Section I- OPERATION & ROUTINE SERVICE
LEVELING 41” MOWER a
With the blades sharpened and properly aligned, a level
Place a 3" high block under the exact center of the
6
mower deck will insure a clean, even cut. The mower rear lip of the deck.
should be checked for level as follows: 7. Pull the pins and remove the chains from the rear lift
1. Check the air pressure in the tires and correct arms. -
pressure as needed (12 psi front and 10 psi rear 8. Turn the outside blades perpendicular to the tractor
tires). frame.
2. Move the tractor to a smooth, flat and level area such 9. Loosen nuts on eccentric bolt and pivot bolt and
as garage floor. level the deck side to side by turning the eccentric
3. Move the lift lever to #5 notch. adjusting bolt. The distance from floor to each blade
4. Place a 2 x 4" block on edge under the front lip of tip should be within 1/8" of each other.
the deck in the exact center between the front lift 10. Loosen the jam nuts and adjust both rear lift chain
arms. eyebolts so that the top link of the chain just slides
5. Loosen the jam nut on the front lift cable and adjust over the rear arm pins. Tighten jam nuts. Reinstall
until the front lip of the deck rests on the 2 x 4 block the flat washers and hairpins. Recheck level.
and the cable is tight. Tighten the cable jam nut and
remove the block. See Figure 31. —
FRONT LIFT CABLE Nu
PIVOT BOLT
— MOWER DRIVE
REAR LIFT ARM — BELT
(CONNECTED TO .
MOWER FRAME) AE TE
OUTER PULLEY — (ple O
BELT GUARDS
DRIVE PULLEY
ECCENTRIC BOLT (©)
LIFT CHAIN — =
FRONT LIFT ARM
FRONT LIFT
CABLE
2" x 4" WOODEN BLOCK
(STAND ON EDGE)
CS
>. NO MOWER DECK
CENTER OF REAR NS
DECK LIP
3" HIGH WOODEN
BLOCK |
LEADING
BLADE
EYE BOLT
JAM NUT
—— CHUTE DEFLECTOR
FIGURE 31
‘ Section 1- OPERATION & ROUTINE SERVICE _
DRIVE BELT SERVICE
To remove and replace the DRIVE BELT, follow steps
1 thru 11.
1. Raise mower hood and disconnect spark plug wire.
2. Lower MOWER DECK to lowest position
3. Remove REAR COVER PLATE. See Figure 32.
REMOVE
SIX (6)
RETAINING
SCREWS
REAR COVER
PLATE
FIGURE 32
4. Depress CLUTCH/BRAKE PEDAL and lock into
position by pulling PARKING BRAKE LEVER "UP".
5. Shift SPEED SELECTOR to 6th position.
NOTE
ALTHOUGH IT IS POSSIBLE TO REMOVE AND
REPLACE THE DRIVE BELT WITH THE MOWER
DECK ATTACHED, IT IS RECOMMENDED THAT
~ THE DECK BE REMOVED TO MAKE BELT IN-
STALLATION EASIER. SEE "REMOVING &
INSTALLING MOWER", PAGES 11 & 12.
6. Disconnect IDLER SPRING. See Figure 33.
©) |
IDLER SPRING
FIGURE 33 i
|
CAUTION
- THE IDLER SPRING IS UNDER TENSION. TO
AVOID INJURY, USE CARE WHEN DISCON-
NECTING SPRING FROM FRAME.
7. Remove hairpin from front of CONTROL ROD then
lower CONTROL ROD. See Figure 34.
e
CONTROL CRANK _X <
NA
\ 7 7 vu 7
=
a I _ , 7
N TL
Tx 7
\ \\
CONTROL mo Y
N \ |
FIGURE 34
NOTE
IF REMOVING/REPLACING DRIVE BELT WITH
DECK ATTACHED, THEN REMOVE MOWER
BELT FROM FRONT DRIVE PULLEY AT THIS
TIME.
8. Remove DRIVE BELT from engine pulley by
rotating MOWER DRIVE PULLEY and holding
down on DRIVE BELT at same time. Allow belt
to remain on hub between pulleys at this time.
See Figure 35.
MOWER DRIVE
PULLEY
—
TRACTION
DRIVE
PULLEY ==7
- NOTE
> BRAKE/CLUTCH MUST
BE DEPRESSED AND
LOCKED. SHIFTER
MUST BE IN 6th
POSITION.
ROLL BELT "OFF"
| WHILE ROTATING
PULLEY
FIGURE 35
;
i
a.
9. Working at the rear of the mower, rotate the DRIVE |
DISC while holding down on the DRIVE BELT until
belt is clear of disc. See Figure 36.
С = p= nes
= ROLL BELT "OFF" =
= WHILE ROTATING | Г
„ий я
1
| yd
[=
DRIVE DISC
|
TRACTION LOSS ADJUSTMENT
It the rubber on the driven disc ring wears enough to
cause loss of traction, readjust the yoke stop (see
Figure 37) to restore good contact. With engine
"OFF" and drive shifted into "NEUTRAL", loosen the
jamnuts and turn the bolt clockwise about 2 turns. Check
to see that rubber ring turns freely in the center or
"NEUTRAL" groove - turn bolt in more if needed to
achieve this, then secure bolt by tightening both jamnuts.
FIGURE 36
10. Remove DRIVE BELT from front pulley.
11. Install DRIVE BELT in reverse order of above.
CAUTION
MAKE SURE THE BELT BEING INSTALLED
Y 4
o ou _ |
+
й я и” “ие
a
a и
ld
Nr -
Г NN
va |
N
TURN SCREW
\. CLOCKWISE
mr
YOKE
-
-
~~ NEUTRAL
IS ABOVE REAR LIFT ARM. A GROOVE
REAR COVER PLATE
(SHOWN IN PHANTOM)
FIGURE 37
KEYSWITCH B 12V GROUND
LIGHT —— ATTERY CABLE -
SWITCH qa
FIGURE 38
SCHEMATIC WIRING DIAGRAM |
|
CABLE
ENGINE —— (Solenoid to Battery)
KILL WIRE
> [
——— SOLENOID
A > Ч
as N
% =
TO HEAD
LIGHTS
CS =
-
CABLE
(Solenoid to Starter) TO
CLUTCH SWITCH
ALTERNATOR SWITCH
“ ] _ _ _ o aB i —_
Section || - "TROUBLESHOOTING
REFERENCES
PROBLEM POSSIBLE CAUSE | PROBABLE SOLUTION
2.1 Engine will not start Transmission interlock prevents starting la. Shift into NEU/PARK and attempt to start | Section VI, 6.1-6.2
| | Cutter interlock prevents starting a. Shift cutter into OUT position Section VI, 6.1
Throttle Control not in starting position |c. Move to CHOKE or START Section |, P. 5-6
| Section VI, 6.1
Fuel Related d. Tank empty, vent cap closed, fue! Section |, P. 5
shut-off valve closed
Ignition Related starting problems e. Spark plug lead loose or disconnected ENGINE
from plug. Faulty spark plug or faulty MANUAL
electronic ignition. Replace.
Interlock switches f. Check for disconnected wires. Section VI, 6.3
Check continuity of each switch.
Check ignition switch.
Battery too weak to start engine 19. Charge battery Section VI, 6.5
; Test Battéry.
7.5 Amp Fuse defective. h. Replace Fuse. Section VI, 6.4, C.
2.2 Engine stall after Throttle control left in full choke a. Move to run position Section 1, P. 5 & 6
running
. Fuel Shut-off valve on b. Open Valve Section |, P. 5,6 & 9
- tank outlet closed
Fuel Tank run dry, fuel line or filter c. Unclog line or refill tank OWNER'S MANUAL
blocked
Engine speed set too slow for starting |d. Adjust throttle to increase speed OWNER'S MANUAL
conditions |
Engine carburetor problems e. Readjust carburetor main fuel setting ENGINE &
| to specifications in engine manual OWNER'S MANUAL
Engine air cleaner clogged causing over{f. Service air clearner OWNER'S MANUAL
rich mixture |
Interlock switch faulty and A shuting off g. Test switch and replace if necessary Section VI, 6.4, F.
engine
2.3 Grease leaking from Cup insert plugs faulty a. Replace with new plugs Section IV, 4.11, B.
chain case |
Case overfilled, leaking grease b. Drain all grease and add 2 ozs. of OWNER'S MANUAL
SNAPPER 0 grease.
Paint drain hole not closed c. Tap tab closed with a hammer and apply
sealer
Case Housing screws loose or missing |d. Replace missing screws and/or tighten all
Screws
Case gasket broken or faulty e. Replace gasket Section IV, 4.11, B.
24 Grease leaking from Cup insert plugs faulty a. Replace with new plug Section IV, INTRODUCTION
differential
Drain hole not closed b. Tap tab closed with hammer and/or apply
— sealer
Case housing screws loose or missing |c. Replace missing screws and/or tighten all
screws
Fender gasket faulty and not sealing d. Replace gasket Section IV
properly
Oil seal leaking e. Replace oil seal Section IV
25 Excessive noise and/ — . Clutch brake chattering against metal a. Check clutch brake mtg. bolt to insure Section IV, 4.2, E.
or vibration when in rim of driven disc producing rattling tightness
drive | sound
Wheel bearings dry, producing dragging |b. Lubricate with grease Section |, P. 8
sound
. Driven disc with missing pieces of rubber |c. Replace disc Section IV, 4.5
. producing thumping sounds and speed
surging
Drive disc will produce roaring sound d. Replace drive disc if warped. See engine | Section IV, 4.4
when warped or out of alignment due to service manual if crankshaft is bent
bent crankshaft |
Rough gears in transmission may cause |e. Check to see if gears | need replacement | Section |, P. 8
excessive noise
or lubrication
Section IV, 4.7, E. &F.
19
~ Section Il - TROUBLESHOOTING
PROBLEM
POSSIBLE CAUSE
| PROBABLE SOLUTION
REFERENCES
2.6 Excessive noise and/or
vibration with blade engaged
Blade tips striking rolled lips of deck
Drive beit improperly tensioned causing
slapping of inside spans in idler pulley
area.
a. Straighten blade and/or align spindle
>
Correct tension. Replace if beit is
excessively worn
Section Hi, 3.5-3.7
Section |, P. 10-12
side to side cut
Deck level uneven causing improper eut
Drive belt slippage causing poor cut
Speed improper for conditions
c. Make necessary adjustments
d. Make necessary adjustments to
correct tension or replace
e. Increase engine speed and/or
lower ground speed to suit
conditions
Spindle bearings dry or worn out c. Lubricate with grease or replace Section |, P. 8
Air lifters improperly installed d. install properly Section III, 3.4
Blade unbalanced or pulley halves e. Balance blade and/or repair pulley Section Ill, 3.4
separated causing vibration and noise |
2.7 Mows Improperly Blade dull producing ragged, brown cut | a. Sharpen blade or replace if Section IH, 3.5
edges on grass necessary
Uneven tire pressure causing uneven b. Inflate tires to specifications Section !, P.10
Section 1, P. 15816
Section 1, P. 10-12
Section |, P. 5
OWNER'S MANUAL
2.8 Will not pull In gear or slips
when clutch is release
Drive disc rubber badly worn or
improper clearance causing poor or
no contact,
Clutch/brake cable too tight causes
declutching when pedal is released
Shift detent out of adjustment - not
completely in gear
Clutch spring disconnected, broken or
missing
Lift yoke sticking or groove worn in slot
Axle Bolt sheared
Whee! hub weld broken
Input shaft key sheared on input shaft
to driven disc
Chain case or differential components
damaged
a. Replace disc or readjust clutch
link guide E
b. Reposition ferrules on cable in
in order to adjust
С. Readjust detent
d. Replace or reconnect spring
e. Lubricate friction points, replace
worn yoke
f. Replace with new tapered bolt
g. Replace hub
Replace key
ji. Requires overhaul
Section IV, 4.4 84.5 |
Section IV, 4.2
Section IV, 4.2
Section IV, 4.1 & 4.2
Section IV, 4.1
Section IV, 4.7, E.
Section №, 4.7, Е.
Section 1V, 4.7 & 4.8
MOWING GUIDE
2.9 ENGINE
ENGINE H.P. ENGINE RPM SLOW RPM CAUSE(S)
12 3400
1. Chute Clogging
2. Overloaded Engine
3. Generally Poor Performance.
‘A. Refer to Engine Owners Manual
2.10 BLADE
2.11 BELTS
A. Keep blade(s) in top condition for maximum
performance and Safety. Refer to Section
NI, 3.6 thru 3.11 for proper maintenance
and adjustments to blade(s).
20
A. Make certain belts are always properly ad-
justed and maintained in top running
condition. Replace belts as necessary.
Refer to Section lll, 3.1 thru 3.3 for proper
belt tension, adjustment and replacement.
Section Il - TROUBLESHOOTING
2. 12, BLADE TO GROUND
- A. In order to maintain the best cut possible,
maintain blades and belts as described
above. Also, maintain proper deck level.
‘Refer to Section lll, 3.7 for proper deck
| adjustments.
2.13 TIRES
A. Even if the blade(s), belts and deck are in
x top running condition, uneven cutting can
- be caused from tires not being inflated
properly. Refer to Section 1, 1.1., A for
proper tire pressures. Always replace tires
with the correct size and height tire. Consult
Parts Manual.
NOTE
Under some grass conditions, the front lip of a HV deck
will prevent the blade from having good access to grass.
As the mower moves forward, the grass is pushed down
by front lip of deck. The direction of rotation of blade
causes the blade to be traveling with the/ grain of grass
-on L.H. side of deck and against grass on R.H. side. See
Figure 2.1. This causes cut to be somewhat ragged on
L.H. side of:mower. Lowering rear of deck approximately
— 3/8" lower than front will eliminate this problem.
TROUBLESHOOTING CUTTING PROBLEMS |
MOWING GUIDE "BLADE DIRECTION OF ROTATION.
~~. (TOP VIEW OF MOWER)
DIRECTION OF TRAVEL —_—
a REASON FOR STREAKING ON LEFT-HAND SIDE —
tl LH. BLADE TIP на
‘FIGURE 2.1
„2
‘Section Ill - CUTTER UNITS
This section covers procedures for the adjustment, dis- Both Cutter Decks have spindle brakes designed to stop
assembly and repair of those Cutter Deck components blade rotation within 3 seconds after the BLADE
used on the SNAPPER LT12D Serles 33" and 41" CONTROL lever has been pushed downward to “OFF”.
LAWN TRACTORS. To Keep the spindle brakes functioning properly, they
must be periodically adjusted. Refer to adjustment
These Cutter Deck components include the drive belts, procedures later in this section. See Figures 3.1 and 3.2.
spindles, brakes lift arms and rail assemblies for both the
single blade and two blade Cutter Units.
BLADE ——— - IDLER- r— LIFT BRACKET CABLE
— SPINDLE ASSEMBLY
- ASSEMBLY DRIVE
BELT
— LIFT
ARM
CASTER
ENGAGEMENT
CABLE
+—— CHUTE .
DEFLECTOR
CASTER |
ECCENTRIC
BOLT
33" DECK — LEAN ©
FIGURE 3.1
22
Section Ill - CUTTER UNITS
-—— LIFT BRACKET CABLE
CHAIN |
© LIFT ARM
ASSEMBLY
IDLER —
| ASSEMBLIES
BLADE - -
SPINDLE
ASSEMBLIES
LUFT
EYE BOLT
+b MOWING
DECK
| | : - REAR
EYE BOLT |; CASTER -
NEEL ОО CHUTE
a DEFLECTOR
LIFT o
CHAIN |
FIGURE 3.2
23
Section Ш - CUTTER UNITS
31 a Information covering service and adjustments for
- both Cutter Decks (single € twin blade) is found in
Section | of this manual. The following information
is covered:
ол
E. Remove cotter pin, 1/4" washer, and
clevis pin from eyebolt.
Remove brake band from brake drum.
Install new brake band and reassemble in
OMMOoOOwW»
3.2
MOWER DRIVE BELT ADJUSTMENT
MOWER DRIVE BELT SERVICE
MOWER SERVICE & ADJUSTMENTS
BLADE BRAKE ADJUSTMENT
CUTTING BLADE SERVICE
REMOVING & INSTALLING MOWER
LEVELING MOWER
(1) SIDE TO SIDE LEVEL ADJUSTMENT
(2) FRONT TO REAR LEVEL ADJUSTMENT
DRIVE BELT SERVICE _
3.3
3.4
(Removal & Replacement)
BRAKE BAND REPLACEMENT
Replace Brake Band if BLADE STOP cannot be
adjusted to stop blade within 3 seconds.
A.
90
NOTE: 33" BRAKE BAND SHOWN
"WASHER
reverse order. Adjust brake band to stop
blade within 3 seconds.
CUTTING BLADE(S)
See Section | of this manual for information
concerning sharpening and balancing of blade(s).
AIR LIFTERS
Air lifters are designed for use on mowers to
increase their vacuuming efficiency when using
grass catchers.
A. Install air lifters on INSIDE TOP flange of
blade with 5/16" screws, lockwashers and
huts. See Figure 3.4.
B. Torque huts to 20-25 Ft. Lbs.
Remove spark plug wire and lower deck to
lowest position.
Loosen pulley screw on IDLER PULLEY until
BELT RETAINER can be moved enough to
allow belt removal.
Remove belt from SPINDLE PULLEY.
Remove jam-nut and SPINDLE PULLEY.
See Figure 3.3.
DRIVE BELT
5/16"
5/16" NUT
~LOCKWASHER
AIR LIFTER
L— BLADE
INSIDE TOP FLANGE
|
SPINDLE
PULLEY
a NUT
T-NUT _
EYE-BOLT
"FIGURE 3.4
3.5 BLADE STRAIGHTNESS CHECK
Check sharpened or replacement blade(s) for
straightness as follows:
A. Mark one blade tip “A” and the other tip “B”.
B. Select one point on deck lip and mark as
reference.
C. Turn blade tip “A” to reference mark and
measure distance between deck lip and
blade. See Figure 3.5.
WASHER
COTTER KEY
BELT GUIDE
IDLER PULLEY
| A DECK LIP
BLADE MEASURE
|
| — DISTANCE
24
FIGURE 3.5
‘Section Ill - CUTTER UNITS
—D. Turn blade tip “B” to same reference point
= and measure distance as above. © SPINDLE SPINDLE HEX FLANGE
E. The blade is straight if both measurements BRACE LOCK BOLTS
are within 1/16" of each other. | BLADE- au
Е. If blade tip measurements differ more than |
1/16", straighten blade as follows:
33" DECK SHOWN.
3.6 PROCEDURE FOR STRAIGHTENING BLADE
A. SINGLE BLADE (33" MODEL)
1. ‘Loosen jam-huts on top of adjustable
“blade holder. |
2. Adjust jack screws “IN” or “OUT” | FIGURE 3.6
until blade tips are within correct | -
| tolerance. 2. Hold blade, shift spindle sideways
3. Tighten jam-nuts. : > until both blade tips are the same
distance from the deck lips: 180
В. TWIN BLADE (41" MODEL) degrees across from each other.
1. If one blade (or both) on the 41" 3. Rotate blade and check alignment
TWIN BLADE Model exceeds | front to rear and side to side. |
the 1/16" measurement differential, 4. Secure spindle hex flange lock bolts
then replacement of the Blade may when alignment is corrected. |
be required, a
2. Check BLADE and SPINDLE ALIGN-
MENT, 3.7, before replacing Blade.
3.7 BLADE & SPINDLE ALIGNMENT
(After Insuring Blade Straightness)
A. With mower on level ground, rotate blade
360 degrees and measure the tip-to-lip
clearance at four equal points around the
deck.
B. If tip-to-lip measurements vary more than
1/8", spindle is misaligned.
NOTE
THE SPINDLE HOUSING HAS OVERSIZED
HOLES FOR ALIGNMENT PURPOSES.
THESE HOLES WILL NOT NECESSARILY
BE CENTERED WHEN CORRECT ALIGN-
MENT 1S ATTAINED.
NOTE
BEFORE ATTEMPTING TO ALIGN SPINDLE,
MAKE CERTAIN TOLERANCE RING IS
PROPERLY ALIGNED IN SPINDLE HOUSING
GROOVE (ON 33" DECKS).
C. PROCEDURE FOR MAKING BLADE
PARALLEL IN DECK
1. Loosen nuts on the three spindle
hex flange lock bolts. See Figure 3.6.
Section IV - TRANSMISSION & DRIVE SYSTEM
INTRODUCTION
This section covers procedures for the disassembly and It should be noted that the Smooth Start Clutch (SSC)
repair of those traction drive components used on the | is used on ALL LT Series LAWN TRACTORS.
SNAPPER LT Series LAWN TRACTORS. | 1990 models feature a reverse assist spring mechanism
which eliminates the shift link spring found on earlier
These drive components include the belt-driven drive models. Earlier models of the LT Serles may be
disc, driven disc, primary chain case, (transmission) axles converted with the LT12D Reverse Assist Spring
and differential. They transmit engine power thru the Kit #61000. See Figures 4.1 and 4.2 for component
belt-driven disc to the driven disc, which in turn powers breakdown.
the primary chain case, differential and axles (transmission).
PINION ¿— PINION GEAR
HEX DRIVE TUBE — SPACER
SHORT AXLE +] | ©
. - PINION SPACER
HEX INSERT A
WASHER x
SPECIAL LOCK
BOLTS
| |
THRUST WASHER
"LH. AXLE BEARING -
THRUST WASHER.
1 .
SPACER OIL SEAL
BOOT CONE WASHER |
"О". RING
FLANGE >
NUT >
LONG AXLE
i (INCLUDES GEAR)
— SPROCKET |
GEAR
CONE WASHER
"O" RING.
BOOT CLAMP L.H. TRANSMISSION
| , $
SUPPORT
OIL FILL
& CHECK PLUG
TRANSMISSION ——
CASE
IDLER BOLT
GASKET
‘DUST COVER
FIGURE 4.1 _.
26
Section IV - TRANSMISSION & DRIVE SYSTEM
HUB
<=
— SPROCKET ——
CASE
‘+ OIL FILL/CHECK
PLUG
— #10-24 X 5/8"
' DRIVEN DISC ©
DRIVEN -—
THRUST -
WASHER
: PLATE
— BELLEVILLE
= WASHER
: 5/8"-18
/ 1° À of LOCK NUT
>< -
. “д Un
PRIMARY —. >>. | CO
"CLUTCH BALL Sao |
BUSHING DS 5/16"-24
BALL ee ss ~ HEX FLANGE LOCK NUT
BEARING | >>
"O"RING >.
_ ss
D SPROCKET ss.
WOODRUFF >
| KEY ~~
— "0" RING
| BALL
x BEARING
Jd ` NL
BELLEVILLE
WASHER
- SELF TAPPING
SCREW
NEEDLE — _ (Л.
BEARING
CASE COVER >
GASKET | >
NYLON THRUST —
WASHER _ |
HUB & SPROCKET |
NYLON — "CHAIN CASE
THRUST COVER
WASHER
NEEDLE —
BEARING
FIGURE 4.2
27:
Section IV - TRANSMISSION & DRIVE SYSTEM
ADJUSTMENTS
41° YOKE ADJUSTMENT
~ The most noticeable symptom that the yoke needs
adjusting is when the tractor shows a loss of pulling.
power in all gears.
‚В. Loosen Carriage Bolt (A) holding Shift Lever
and Shift Lever Adjuster together. See
Figure 4.5.
As the driven disc (rubber) wears, the yoke must
move farther "up" before the disc engages. At
some point during wear, the yoke will hit the
adjustable stop before the driven disc engages the
drive disc. © When this occurs, the yoke must be
adjusted.
A. Depress Clutch Pedal and shift Transmission
Lever to NEUTRAL. Refer to Figure 4.3.
B. Place hand (palm up) under disc and,
without lifting, turn the disc.
Now, lift disc up and attempt to rotate it. If
= ©) A
Ad namas -
‘BOLT (A)
C.
the yoke is properly adjusted, the disc will
not rotate against the drive disc. NX |
D. If the driven disc does rotate, run the adjust- J SHIFT LEVER
ing carriage bolt “UP until disc will not rotate. shirt = ADJUSTER
i See Figure 4.3. | В HEX JAM . LINK =
rd U ве > >
< <> > >
=
=
=
=
FIGURE 4. >
C. Move slotted Shift Lever yr Adjuster until
Transmission is in NEUTRAL position in
Shifter Detent as shown in Figure 4.6.
ADJUSTING
CARRIAGE
BOLT.
PRIMARY -
CLUTCH BALL
NEUTRAL
| POSITION
"YOKE |
— FIGURE 4.3
4.2 ADJUSTING SHIFT DETENT
DRIVE DISC .—4
A. Depress Clutch Pedal and move Transmission
TRANSMISSION
SHIFTER
. SHIFT
Shifter until Primary Clutch Ball is in NEUTRAL DETENT
position in yoke. See Figure 4.4.
L—— YOKE
4 RIGHT SIDE
SHOWN
PRIMARY —
CLUTCH BALL —
FIGURE 4.6
NEUTRAL POSITION
FIGURE 4.4
4.3
—D. Check to make sure Primary Clutch Ball is
still in NEUTRAL position in yoke.
E. Tighten Carriage Bolt holding Shift Lever
and Shift Lever Adjuster together.
F. Test unit for proper shifting. Readjust if
necessary.
DRIVE DISC REPLACEMENT
Roaring sounds could be caused by a warped
Drive Disc Assembly. Use a dial indicator to check
for variance in the surface. If the surface varies
more than .020", replace the Drive Disc Assembly
(See 4.4, DRIVE DISC REMOVAL, for procedure).
NOTE
EXCESSIVE RUN-OUT CAN CAUSE
PREMATURE YOKE WEAR.
4.4
DRIVE DISC REMOVAL
(ALSO FOLLOW THIS PROCEDURE FOR
DRIVE DISC BEARING REPLACEMENT)
A. Remove Shift Handle by driving out Roll Pin.
See Figure 4.7.
SHIFT
HANDLE
ROLL PIN
TRANSMISSION —
SHIFTER (LEVER)
FIGURE 4.7
B. Remove Rear Cover.
C. Disconnect wires to seat switch and remove
Rear Fender from tractor. See Figure 4.8.
‘Section IV - TRANSMISSION & DRIVE SYSTEM
| REMOVE FOUR — REMOVE SIX (6)
“TOP FENDER
SCREWS
\—- REMOVE TWO (2)
LOWER FENDER
SCREWS
REAR COVER ZN
FIGURE 4.8
yoke as shown in Figure 4.9.
D. Unhook Tension Spring from R.H. side of
SPRING
FIGURE 4.10
29.
Lt TENSION
AS SPRING
re
N
i PRIMARY
| CLUTCH BALL
AD - YOKE
— DRIVE
FIGURE 4.9
E. Remove Hairpin and washer, and slide
Reverse-Assist spring off post.
See Figure 4.10.
EY —— WASHER
REVERSE-ASSIST
Section IV - TRANSMISSION & DRIVE SYSTEM
‚В. Remove Cotter Pin, Washer and slide Clutch —
` Rod out of Yoke Arm Bushing. Note position
of Yoke Arm Bushing Flange. Refer to
Figure 4.11.
CLUTCH
ROD
FLANGE BUSHING WASHER
FIGURE 4.11
G. Loosen R.H. Transmission Support, then re-
move four self-tapping screws holding Drive
Disc Support to R.H. & L.H. Transmission
Supports. Q à /
SELF —- hn
TAPPING e
SCREWS si ">
a \ DRIVE DISC
SUPPORT
“SELF |
TAPPING
SCREWS
BRACKET YOKE PIVOT
(RH) BRACKET
(CH)
FIGURE 4.12
H. Move Drive Disc Support Assembly to the
rear until Primary Clutch Ball Bushing is free
of the Chain Case Shaft.
"I. Withdraw Drive Disc Support Assembly from
tractor.
J. Remove Yoke and Yoke Pivot Brackets from
Drive Disc Support.
.
NOTE
REMOVE PRIMARY CLUTCH BALL BY
ROTATING BALL UNTIL HOLE IS FACING
UP OR DOWN. WITHDRAW BALL FROM
YOKE
.
AL
K. Remove Drive Disc by removing locknut
bearings and spacer. Refer to Figure 4.10.
L. Inspect Drive Disc and bearings for wear or
other damage. Replace if required.
4.5 DRIVEN DISC REPLACEMENT
If the tractor does not move, or travels erratically
when the Transmission is shifted into DRIVE,
and the Clutch Pedal is released, the first thing
to check for is a worn Driven Disc. Poor contact
between the Drive Disc and Driven Disc may be
caused by a worn yoke lift structure or an excess-
ively worn Driven Disc. Replace the disc if the
rubber is worn down to within 1/32" to 1/16" of
the metal surface, or if it is badly chunked.
See Figure 4.13.
NOTE
GREASE OR OIL ON THE SURFACE OF
THE DISCS WILL ALSO CAUSE SLIPPAGE.
KEEP THE SURFACES CLEAN!
RUBBER
DRIVEN —
DISC
(SECTION)
DRIVEN DISC
"ASSEMBLY
FIGURE 4.13
REPLACE" THE DRIVEN DISC AS FOLLOWS:
° А. Use a 1/2" socket wrench to remove the four
~ retaining hex flange lock nuts. Turn nuts
counterclockwise to remove. Use #3-2392
SPECIAL SMOOTH CLUTCH TOOL to hold
the Driven Disc to prevent its turning while
removing or installing retaining nuts.
See Figure 4.14.
TURN COUNTER
. CLOCKWISE #3-2392 TOOL
TO HOLD DRIVEN
DISC
FIGURE 4.14
B. When installing a new Driven Disc on
SMOOTH CLUTCH, make certain that fiber
washer is centered over boss hub on center
of Driven Disc Hub. See Figure 4.15.
— DISC -
HUB DRIVEN
DISC (RUBBER)
FIBER
THRUST
WASHER
PLATE
BOSS
"FLANGE LOCK u A
FIGURE 4.15
Section IV - TRANSMISSION & DRIVE SYSTEM
© “FLOAT” AROUND BOSS ON CENTER
NOTE
IF THE FIBER WASHER 1S NOT FREE TO
OF DRIVEN DISC HUB, IT CAN CAUSE
BINDING OF THE SMOOTH CLUTCH.
CAUTION!
IF THE DRIVEN DISC IS REMOVED FROM
THE CHAIN CASE SPROCKET SHAFT
FOR ANY REASON, THE LOCKING NUT
MUST BE TORQUED TO 70 FT. LBS.
4.6
- DURING INSTALLATION.
TRANSMISSION SHIFTER DISASSEMBLY
‘CAUTION!
THE SHIFTER IS SPRING-LOADED.
REMOVE WITH CARE TO AVOID
POSSIBLE INJURY
A. Compress the Shift Detent Spring with a
“C” clamp, vise grip pliers or other safe,
suitable means.
B. Remove the Cotter Pin and Clevis Pin from
the Shifter Arm. See Figure 4.16.
“TRANSMISSION
SHIFTER
- CLEVIS *
PIN |
COMPRESS
SHIFT DETENT
SPRING |
FIGURE 4.16 |
Section IV - TRANSMISSION & DRIVE SYSTEM
X C. Release spring tension slowly as Shifter Arm
slides out of Shifter Pivot.
О. REINSTALLING SHIFTER COMPONENTS
To prevent component wear, reassemble all
parts EXACTLY as shown in Figure 4.17.
Place one Hardened Thrust Washer on the
Shifter Arm’s shaft (against Arm) and against
the flange on Bushing. The other Hardened
Thrust Washer goes between the Shifter
and flange of other Bushing.
HARDENED +
THRUST
WASHER |
BUSHING
PIN
FLANGED
FIGURE 4.17
CLEVIS
Y | FLANGED
bi od BUSHING
- SHIFTER PIVOT
» SHIFT DETENT
SPRING
\ WASHER
32.
HARDENED THRUST
4.7 DIFFERENTIAL DISASSEMBLY & REPAIR
The SNAPPER Transmission System contains two
fundamental components. The Differential
“ Assembly and the Primary Chain Case.
The Primary Chain Case Assembly transfers power
from the engine through the hex drive tube to the
Differential.
The Differential Assembly drives the rear wheels of _
the tractor. If the tractor will not pull, elevate the
rear wheels and turn both in the same direction and
observe Driven Disc. If Disc does not turn, a
broken axle bolt, differential gears or broken chain
in Differential or Primary Chain Case may be the
cause. If the Driven Disc does turn when testing
for the no-drive cause, check for the following:
A. Yoke set tbo low - Driven Disc not contact-
ing Drive Disc. Adjust per instructions in
— Section 4.1. |
B. Yoke spring missing, broken or disconnect-
ed. Reconnect or replace.
C. Remove the Driven Disc Hub from Sprocket
Shaft and check for sheared key. |
D. To check for problems in Primary Chain Case,
loosen clamp on one of the boots,
slide boot back and observe hex drive tube
while turning both rear wheels in same
direction. If the tube does not turn, the
Primary Chain Case can be eliminated as
the site of the no-drive condition.
E. Ifthe no-drive condition is caused by a
problem in the Differential or Primary Chain
Case, overhaul using the following
procedures:
1. Elevate tractor in such a manner
that the rear wheels can be
removed.
2. Using 3/4" socket, remove both
rear wheels from hubs.
3. Remove nuts from tapered axle
bolts on both drive hubs. Use 1/2"
wrench or socket and pliers for re-
moval as shown in Figure 4.18.
“Section IV - TRANSMISSION & DRIVEN SYSTEM
TAPERED
AXLE BOLT-
RETAINING
NUT
(USE 1/2" SAE
WRENCH OR
SOCKET) —
FIGURE 4.18
4, Remove tapered axle bolts by
tapping with a soft-faced hammer.
Pull wheel hubs using SNAPPER
#60237 Hub Puller. See Figure 4.19.
PULLER
FIGURE 4.19
Remove Rear Cover and Rear
Fender from tractor. |
Remove Drive Disc Support Assembly.
(See Instrutions in Section 4.4).
Remove hardware securing L.H.
Transmission Support to L.H.
Extension. See Figure 4.20.
L.H. TRANSMISSION
SUPPORT
-
SELF-TAPPING
SCREW
3/8" WASHER
L.H. EXTENSION
y——— "16X1"HEX
FLANGE LOCK BOLT
FIGURE 4.20
9. Loosen outside boot clamp and slide
boot away from L.H. Transmission
Support.
10. Remove L.H. Transmission Support
(with Differential attached) and place
in either a 2" diameter hole drilled in
workbench or fabricated 2" x 4"
wooden support. See Figure 4.21.
‚| AXLE THROUGH 2" DIA. HOLE
| IN WORK TABLE OR BOARD 7
Pa
CN 4 |
IDLERBOLT | y -
| &NUT г e |
o y
ALIGNING ©
SCREW & NUT :
a LH. |
| TRANSMISSION
I SUPPORT |
FIGURE 4.21
Section IV - TRANSMISSION & DRIVEN SYSTEM
11. Remove the 14 self-tapping screws — на > MET AL HEX
securing Transmission Case to L.H. — | THRUST WASHER —
Transmission Support. Remove the INSPECT BUSHINGS
two nuts from the hex flange aligning IN BOTH ENDS FOR WEAR
screws and the hex flange locknut SPROCKET
from the idler bolt. Refer to Figure |
4.21. AY TN
= i CE MALA
12. Remove Dust Cover. mp Na
13. Remove L.H. Transmission Support A A
from Transmission Case. | MN N°
14. While holding the hex drive tube in AIN
place, pull the Bull Gear Assembly / N
up and out of the way of the hex HEX AA
tube. Lay gear assembly aside. DE y <
15. Remove the “O” ring and cone О НЕХ ——” | И N
washer from idler bolt. DRIVE ALIN
: 1 | 6 м
16. Remove chain, sprocket, eleven EUR
tooth gear and spacer from idler bolt. - BUSH AD
17. Remove lower cone washer and “O” + BUSHING A N
ring. See Figure 4.22. AT TN
"O" RING SECTION VIEW
CONE WASHER (UP) |
| ; NYLONHEX _°
| \ INSERT WASHER
SPACER rt -
| "FIGURE 4.23
20. Remove nylon hex insert washer.
21. Inspect bronze bushings in both
ends of Hex Drive Tube Assembly.
Refer to Figure 4.23.
22. Insert the Bull Gear Assembly in the
— 2" Xx 4" wooden support.
23. Remove the self-locking capscrews
from Differential Plate and discard -
GEAR
SPROCKET
e SPROCKET they cannot be reused. Replace
fd RETAINING ; ;
2 RING | | with new #1-2333 capscrews during
> ON reassembly. See Figure 4.24.
/ e `
bo. L “ |
De > —— | NOTE: | EEE |
| SN | DISCARD USED DIFFERENTIAL
^^ ` | CAPSCREWS-
eu o DO NOT Cd
i | Na REUSE!
lo CONE WASHER vi
a (DOWN) | OS yA
Nm NV /
- "O" RING oa SE
A
FIGURE 4.22
18. Remove hex drive tube. ODEN
19. Remove hex washer from top end of |
hex tube. See Figure 4.23.
{ Ш
i | | : SELF-LOCKING
| CAPSCREWS *
Co FIGURE 4.24
34
Section IV - TRANSMISSION & DRIVE SYSTEM
24.
Remove the Thrust Washer and
Differential Plate. See Figure 4.25.
DIFFERENTIAL
PLATE
р
— BULL GEAR
ASSEMBLY
FIGURE 4.25
Remove short axle.
Thoroughly clean and carefully
inspect each component of the
Bull Gear Assembly. Replace any
damaged or worn parts.
'F. DIFFERENTIAL REASSEMBLY
PROCEDURE
1.
2.
3.
Center the Bull Gear over the hole in
the 2 x 4 wooden support or workbench.
Insert the long axle in the Bull Gear.
Install the nylon spacer on the long
axle-over the weld. (This spacer
establishes proper position of the
long and short axles. Replace
spacer if damaged or worn).
See Figure 4.26.
NYLON SPACER
"MAKE CERTAIN |
NYLON SPACER
IS OVER GEAR |
| WELD |
(REPLACE IF WORN)’
LONG’ a a
AXLE
FIGURE 4.26
4. Inspect bushing in short axle for
wear. lf worn excessively, replace
short axle assembly. See Figure 4.27.
SEE
— INSPECT
~ BUSHINGS
à ‘à FOR WEAR
(PRE-LUBRICATED)
SHORT BUSHING
AXLE
SHORT
AXLE
SECTION VIEW
FIGURE 4.27
5. Prelubricate short axle bushings with
SNAPPER “0” Grease.
6. Install short axle over long axle,
insuring that the nylon spacer fits
down over the weld of the long axle.
See Figure 4.28.
SHORT AXLE —
NYLON SPACER
(FITTED OVER WELD
ON LONG AXLE)
|
FIGURE 4.28
‘Section IV - TRANSMISSION & DRIVE SYSTEM
7. Prelubricate pinion spaces before
installing.
8. Install four twelve-tooth pinion gears
and spacers in staggered position -
spacer below one gear and above
‘onthe next. See Figure 4.29.
NOTE
EXTRA TOUGH BULL GEAR ASSEMBLIES
UTILIZE EIGHT PINION GEARS & EIGHT
SPACERS.
SPACER ON TOP
… GEAR ON TOP
GEAR ON TOP .
SPACER ON TOP
FIGURE 4.29
NOTE
PINION GEARS AND SPACERS MUST BE
OPPOSITE (NEXT TO EACH OTHER) AND
DIAGONALLY (ACROSS) AFTER INSTALL-
ATION IS COMPLETE. |
9, Insert new SNAPPER #12333
capscrews through Differential
Plate, Pinion Gears/Spacers,
and screw into Bull Gear. See
Figure 4.30. E
| DIFFERENTIAL
PLATE
ak
DE E |
© | J
NEW #1-2333 — oy |
CAPSCREWS = | N À
BULL GEAR |
ASSEMBLY |
DS PINION GEARS
| me = —
FIGURE 4.30
E
я = -
36
"O" RING
И
|
CAUTION!
~ THE SNAPPER #12333 CAPSCREWS ARE
~~ MISALIGNING THREAD-TYPE LOCKING
SCREWS AND INTENDED FOR ONE-TIME
USE ONLY! DO NOT RE-USE REMOVED
CAPSCREWS! REPLACE WITH NEW,
UNUSED SNAPPER #12333 CAPSCREWS
ONLY!
10. Alternately tighten capscrews to
16-25 Ft. Lbs. with torque wrench.
11. ‘Remove Bull Gear Assembly from
wooden support or bench.
2. Install external tooth lockwasher and
flat washer on idler bolt.
13. insert idler bolt into transmission
~ case from outside. Slip “O” ring
оп idler bolt from jnside. See
Figure 4.31.
~~ NS |
N
o s
NN P
FLATWASHER
1 `
‘EXTERNAL TOOTH \
; |
! t
LOCKWASHER
FIGURE 4.31
CASE:
Place transmission case on wooden
support or bench. Align holes in case
and bench support. |
Inspect the hex insert washer for wear
before installing on hex tube. |
Replace if required. (The hex insert
washer, being nylon, serves as a
bearing surface and also prevents
grease from being splashed off the
chain into the boot). Also, check the
bushings in each end of the hex tube
for wear and placement. Replace
hex tube assembly if bushings are
worn. See Figure 4.32.
IDLER BOLT —
(INSTALLED FROM
QUTSIDE OF CASE)
en SPROCKET
EEE" и «о
Е ый
NYLON HEX
INSERT WASHER
(INSTALL LIP TOWARDS
SPROCKET!)
"BUSHING *
DI77 277777737
'HEX TUBE
LEE EEN
L
BUSHING
VIP PITT TE
A
— “
SECTION VIEW - HEX DRIVE TUBE --
— FIGURE 4.32
16. ‘Install hex drive tube in transmission
case and lubricate internally with grease.
17. Reinstall metal thrust washer on
sprocket end of hex shaft. See
Figure 4.33.
ui TOWARD
METAL -
THRUST
WASHER
(SPROCKET
LUBRICATE BOTH = END)
HEX TUBE BUSHINGS
WITH SNAPPER "0"
GREASE
NYLON HEX __
INSERT WASHER
НЕХ —
DRIVE
TUBE
FIGURE 4.33
CAUTION!
THE THRUST WASHER SHOWN IN FIGURE
| 4.32 SERVES AS A BEARING SURFACE
BETWEEN THE BULL GEAR ASSEMBLY AND
HEX TUBE. OMISSION OF WASHER DURING
ASSEMBLY, CAN CAUSE EXCESSIVE WEAR
IN THE HEX TUBE AND MAY CAUSE THE
SPROCKET TO FALL OFF!
18. Place one cone washer (EDGE
DOWN) over “O” ring on idler bolt
and press firmly against
| Transmission Case. |
19. Assemble spacer, sprocket and !
chain, and install as a unit in case. |
(There is not enough clearance to
install the chain and sprocket
individually). Make sure the hole in
the side of the 11-tooth gear is
clean - this allows lubrication to
reach the bearing race. See Figure
4.34.
Section IV - TRANSMISSION & DRIVE SYSTEM
MAKE CERTAIN’
LUBRICATION -.
"HOLE IS OPEN —
| AND CLEAN —,
"O" RING
- CONE WASHER
(EDGE UP - AGAINST "0" RING)
“SPACER
GEAR/SPROCKET
ASSEMBLY
'HEX TUBE -
ASSEMBLY
20.
21.
22.
"CONE WASHER o
(EDGE DOWN | Ç Da
AGAINST "0" RING) Ц 1
FIGURE 4.34
Place cone washer (EDGE UP) on
idler bolt, then slip “O” ring on bolt
and against washer.
Thoroughly grease long axle and
insert it into hex tube.
Reinstall thrust washer over end of
short axle (against Differential Plate).
This washer serves as a bearing
surface between the Bull Gear
Assembly and the bearing in the L.H.
Transmission Support. Refer to
Figure 4.25.
BEFORE PROCEEDING FURTHER,
LUBRICATE THE OUTSIDE OF THE
NOTE
SHORT AXLE WITH GREASE.
23. Install new gasket on transmission
case. |
24. Align L.H. transmission support
against transmission case.
25. Instai! lock nut on idier bolt. DO
NOT TIGHTEN. |
26. Insert the two aligning capscrews
through end holes from case side.
Fit with lock nuts and tighten.
27. Install and tighten eleven self-tapping
screws, then tighten idler lock nut to
18-20 Ft. Lbs. with torque wrench.
Section IV - TRANSMISSION & DRIVE SYSTEM ~~
Е | NOTE
IT IS IMPERATIVE THAT THE IDLER BOLT
LOCKNUT BE PROPERLY TIGHTENED. IF
LOOSE, THE CHAIN AND SPROCKET ARE
THROWN OUT OF ALIGNMENT WHICH
COULD RESULT IN UNEVEN WEAR ON THE
BULL GEAR AND ELEVEN-TOOTH GEAR,
CAUSING MISALIGNMENT OF THE CHAIN
AND SPROCKET. THIS CONDITION COULD
CAUSE THE CHAIN TO BREAK AND JUMP
OFF THE SPROCKET.
28. Install NEW oil fill and oil check
plugs in case. |
29. The Differential is now completely
rebuilt and ready for reinstallation
into the Transmission System.
After installing, fill Transmission
Case to proper level with SNAPPER
“O” Grease.
48 PRIMARY CHAIN CASE DISASSEMBLY
PROCEDURE
A. CHAIN CASE REMOVAL -
1. Elevate tractor and remove both
rear wheels.
2. Remove R.H. drive hub.
3. Remove rear cover and rear fender
from tractor.
4, Remove Drive Disc Support
Assembly. Remove Yoke and Yoke
Pivot Brackets from Support. (See
instructions in Section 4.4). |
5. Remove hardware securing R.H.
Transmission Support to R.H.
extension. -
6. Loosen both boot clamps and slide
boot away from R.H. Transmission
Support and Primary Chain Case.
‚7. Remove R.H. Transmission Support.
8. Disconnect the short shift link from
the Primary Chain Case. See Figure
4.35.
LH.
- FENDER |
7
"CROSS-TIE
SHORT
SHIFT : PRIMARY —
LINK CHAIN CASE
pn
FIGURE 4.35
38.
E
9. Disconnect Brake Lever Assembly
from rear of Chain Case, then dis-
connect Brake Cable Housing from
clip on Chain Case. See Figure 4.36.
PRIMARY
CHAIN
CASE
SELF-TAPPING
SCREW
10. Slide the Primary Chain Case off end of
Hex Drive Tube. |
CHAIN CASE DISASSEMBLY &
REASSEMBLY
1. Disassemble Chain Case as shown in
Figure 4.37. Remove 5/8" hex lock nut,
cone washer, driven disc hub, woodruff
key, and remaining cone washer from the
sprocket shaft. a
Remove the 10 self-tapping screws to
open case for access to internal
components. Always thoroughly clean
and carefully inspect all internal
components. Replace any damaged or
worn parts and prelubricate before
reassembly.
2. Reassemble the internal and external
components in reverse order and always
replace the case cover gasket.
CONE
SPROCKET |
| | WASHER
SHAFT — [N
DIA
FIGURE 4.37 >
LOCKNUT
Section V - FRONT AXLE & STEERING REPAIR
This section covers procedures for the removal and These components include the front axle, kingpin
replacement of those front axle and steering components assemblies, steering quadrant and steering shaft
used on the LT12D Series Lawn Tractor. assemblies and front wheel assemblies.
See Figure 5.1.
‘STEERING WHEEL
ROLL —
PIN
- RETAINING RING
STEERING - Jr
SHAFT | THRUST
WASHER — THRUST
| A | WASHER
SHIM WASHERS + w SECTOR |
| a . ASSEMBLY
STEERING - =r
ADJUSTER
SHIM WASHER .— >
| т — STEERING oo
RETAINING > SUPPORT ADJUSTABLE
RING ROD END
AXLE PIVOT -
SPACER | |
‘DRAG
LINK
FRONT ADJUSTABLE
AXLE SJ ROD END
STEERING ARM
. THRUST WASHER
- GREASE " FRONT WHEEL
| N В FITTING “THRUST! Lo ASSEMBLY
Co So ~ “FRONT AXLE a ‘WASHER
R.H. SPINDLE + CAP SCREW ‘ e |
ASSEMBLY 2
le ADJUSTABLE -
BALL JOINT a
TIE — TUN
ROD
\L.H. SPINDLE
| ASSEMBLY -
ond ADJUSTABLE
BALL JOINT
39"
Section V - FRONT AXLE & STEERING REPAIR
52 SPINDLE & BEARING REPLACEMENT
5.1 FRONT WHEEL & BEARING REPLACEMENT
- The LT Lawn Tractors use fully-pneumatic tires
- on both front and rear axles. Should rim leakage
occur, it is recommended that optional inner tubes
be installed. Removal and replacement of
front wheels and bearings are as follows:
A.
Raise and support front end of tractor.
CAUTION!
THE LT TRACTOR IS NOT DESIGNED TO
BE STOOD UP ON ITS REAR END!
‘SPINDLE
AIR VALVE
=
7
INNER “
WASHER
Remove dust cover, cotter pin and flat
washer.
Slide wheel off front spindle. Inspect
Replace as required. |. See Figure 5.2.
| EASE FITTING
INNER - GR TTIN
BEARING
FIGURE 5.2
To replace wheel bearings, drive each out
‚ from inside of rim with drift punch. Pack
- replacement bearings with grease and
lightly tap into position.
Inspect inner washer on spindle. Replace
if worn.
Reinstall wheel and bearing assembly as
shown in Figure 5.2.
OUTER BEARING ©:
FLAT WASHER
DUST COVER
-40
_ A. Raise and support front end of tractor.
° Remove wheels from spindles.
B. Remove spindle assemblies as follows:
Drive roll pin out of steering arm
and, with drag link attached, remove
steering arm from spindle (leaving
drag link attached will eliminate need
for adjustment during reassembly. )
See Figure 5.3.
(1)
"FRONT AXLE
TIE-ROD
ADJUSTABLE -
BALL JOINT
(2)
(4)
(5)
(6)
(7)
STEERING ARM
THRUST WASHER
>! SLÉEVE
| BEARINGS
y
THRUST *
WASHER
LH.
"SPINDLE
ASSEMBLY |
FIGURE 5.3
Disconnect tie rod from arm of
spindle.
Remove thrust washer from end
of king pin protruding above axle.
Slide king pin out of bearings.
Inspect bearings at top and bottom.
If worn, replace.
Inspect lower thrust washer for
wear. Replace if required.
- Reverse procedure to reinstall
spindle assembly.
Section V - FRONT AXLE & STEERING REPAIR
ADJUSTER
5. 3 STEERING SHAFT & SECTOR ASSEMBLY
+ Although the steering components seldom need
repair, the thrust washers, bearings and shims
sometimes wear to a point where replacement is
necessary. The following text gives instructions
for the disassembly, replacement and reassembly
of those components.
A. STEERING SHAFT SHIM WASHERS
(1) Remove mower deck and place
tractor on a work platform high
enough to allow access to work
underneath.
(2) Remove retaining ring and lower
shim washer from end of steering
shaft. See Figure 5.4.
—— STEERING
~ ADJUSTER
ARRIAGE BOLT
SECTOR —
ASSEMBLY |
LOWER END
‘OF STEERING
SHAFTR\ -
LOWER |
NSHIM WASHER
LOWER END OF - 0;
STEERING WN
RETAINING >
RING
| ‘DRAG LINK =
FIGURE 5.4
Using a soft metal drift pin and
hammer, tap the lower end of
steering shaft until it can be pulled
clear of the steering adjuster.
See Figure 5.5.
LOWER END OF |
‘STEERING SHAFT
-
SOFT METAL:
DRIFT PIN
Thor 1
| PULL UP ON STEERING |
WHEEL UNTIL STEERING |
SHAPT CLEARS STEERING |
ADJUSTER.
FIGURE 5.5
Remove tractor hood.”
After steering shaft has been pulled
clear of steering adjuster, remove
the shim washers from below gear on
bottom of shaft. See Figure 5.6.
(4)
(5)
SHIM WASHERS STEERING SHAFT
STEERING - - SECTOR ASSEMBLY
ADJUSTER
STEERING
SUPPORT “1
FIGURE 5.6
Check all shim washers for wear.
Replace if worn.
Reassemble components in reverse
- order.
If required, the steering adjuster can
be removed/replaced by first remov-
ing the short carriage bolt and nut,
then rotating the steering adjuster
until the locking tab is aligned with
the notch in the steering support.
Lift the steering adjuster out and
replace with new part. See Figure 5.7.
HOOD REMOVAL
To service engine (changing oil, spark plug, etc.).
It is recommended that the hood be removed.
| “ Hood removal is as follows:
1. With hood in closed position, unhook latches
at bottom rear of hood.
2. Disconnect headlight wire at lower left front
of hood.
3. With hood level, lift straight up to clear pivot
pins at front. See Figure 5.6-A.
4. Remove hood and lay aside until maintenance
| is completed. Reinstall hood in reverse order.
41,
| STRAIGHT
DISCONNECT-
LIFT
CUP:
FIGURE 5.6-A
‘Section V - FRONT AXLE & STEERING REPAIR
ROTATE STEERING —
ADJUSTER UNTIL
| LOCKING TAB
ALIGNS WITH
NOTCH
NUT
STEERING SUPPORT
REMOVE SHORT
a CARRIAGE BOLT
STEERING — AND NUT
ADJUSTER
FIGURE 5.7
B. SECTOR ASSEMBLY BEARING &
THRUST WASHERS
(1) Remove mower deck and place
tractor on a work platform high
enough to allow access to work
underneath.
(2) Remove tractor hood.
(3) Loosen carriage bolt on steering
adjuster and rotate adjuster to the
L.H. side of tractor until steering
shaft gear separates from sector
teeth. See Figure 5.8.
" STEERING - | NOTE
SHAFT MAKE CERTAIN
ADS STEERING GEAR
Ue ZA SEPARATES FROM
LOOSEN CARRIAGE y SECTOR TEETH
‚ADJUSTER — 11 Sp
a» SECTOR
ui ASSEMBLY
— ROTATE —————— Zu
| STEERING ‘ ‘DRAG LINK
ADJUSTER DRAG LINK
ALL WAY TO
LH. SIDE
OF TRACTOR
- ~~ |
FIGURE 5.8
(4) Disconnect drag link from sector
assembly.
(5) Remove retaining ring and upper
thrust washer from sector assembly.
(6) Lift sector assembly off steering
support post. See Figure 5.9.
RETAINING
RING
+" UPPER THRUST.
WASHER
REMOVE BEARING ONLY
FOR REPLACEMENT
— LOWER
THRUST
~~ WASHER -
SECTOR
DRAG LINK
@—— LOCKWASHER '-
ha | CAPSCREW
POST
STEERING
SUPPORT
FIGURE 5.9
(7) Inspect sector bearing for wear.
Replace sector if necessary.
(8) Inspect upper and lower thrust
washers for wear. Replace if needed.
(9) Reassemble components in reverse
order. |
C. STEERING SHAFT REPLACEMENT
(1) Using a drift pin and hammer, drive
out the steering wheel roll pin.
Remove steering wheel. See Figure
5.10.
‘Section V - FRONT AXLE & STEERING REPAIR
shim washer from lower end of
steering shaft.
(3) Remove steering adjuster carriage
bolt and nut.
(4) Tap bottom end of steering shaft
until it can be pulled clear of
steering adjuster.
(5) Remove the two (2) shim washers
from bottom of steering shatt.
(6) Rotate steering adjuster until locking
tab aligns with notch in steering
support.
(7) Lift and remove steering adjuster
e from its interlocking position on
| | steering support.
(8) Withdraw steering shaft down through
| notched hole in steering support.
(9) Replace steering shaft in reverse
| order.
D. STEERING SHAFT FLANGE ASSEMBLY
(UPPER BEARING) REPLACEMENT
- The steering shaft flange assembly (upper
bearing) is located underneath the top front of
| mt OUT ROLL | | < ZUSE DRIFT PIN
PIN FROM SIDE | >» “= AND HAMMER
TO SIDE ONLY! a >—7 TO DRIVE OUT
5 "E XX ROLL PIN.
FIGURE 5.10 ВЕ
(2) Remove retaining ring and lower
1/4 INTERNAL-
“TOOTH LOCK
‘WASHERS
CONTROL PANEL
ar -20x1"La.——
PHILLIPS HD. — 7
SCREWS
© STEERING
/ SHAFT
Vd
(CH
SUPPORT
|
PEFLANGED ASSEMBLY
(UPPER BEARING)
q
1/4 - 20 HEX. NUT
(3)
(4)
FIGURE 5.11
‘Replace bearing if required.
Reinstall steering shaft components
in reverse order.
ADJUSTING STEERING
Excessive steering "free-play"” is caused by loose meshing
between the teeth on the steering shaft and those on the
sector assembly. Proceed as follows:
the steering shaft support. Should this bearing
- need replacement, proceed as follows:
(1) Remove steering wheel and steering
shaft.
(2) Remove mounting hardware and
flanged bearing from the steering
shaft support. See Figure 5.11.
(1)
(2)
(3)
LOOSEN-
Working from the left side of the tractor,
use a 7/16" wrench to loosen nut on
top of steering adjuster carriage bolt.
See Figure 5.11A.
Push eccentric clockwise (towards R.H.
side of tractor) until free-play in
steering wheel is minimized.
Retighten nut.
ECCENTRIC
FIGURE 5.11A
Section V - FRONT AXLE & STEERING REPAIR.
5.5
5.6
TIE ROD & BALL JOINT REPLACEMENT
(1) Remove part to be replaced (Ball
joint(s) or tie rod).
(2) Install new tie rod or ball joint(s).
(3) Adjust new installation until tires
are parallel and facing straight
ahead.
DRAG LINK REPLACEMENT &
ADJUSTMENT
A. Disconnect drag link from steering arm
and sector assembly.
B. Inspect drag link for deformities and rod
ends for wear. Replace either if required.
C. Assemble and install new parts. Adjust
rod ends (in or out) until wheels turn
maximum distance in both directions
when steering wheel is turned lock-to-lock.
FRONT AXLE REPLACEMENT
If replacement of the front axle becomes necessary,
support mower just rear of the axle, then remove
items such as wheels, spindle assemblies, etc. that
are to be fitted to new axle. After the axle has been
stripped, proceed as follows:
A. Remove hood (refer to Figure
5.6-A).
B. Remove axle cap screw and spacer and
remove axle. See Figure 5.12.
A - D > _ ‘ ,
| + у FRONT |
| A ; AXLE CAPSCREW |
- RETAINING N
NUT ,
AXLE PIVOT
AXLE | SPACER
FIGURE 5.12
€ Check axle pivot spacer for wear. Replace
if worn.
D. Install new axle. Complete the assembly
with parts previously removed from old
axle. Lubricate bearing surfaces through
grease fittings. |
44
NOTE
PROPERLY RELUBRICATE THOSE AREAS
- OF TRACTOR WHICH HAVE BEEN REPAIRED
BEFORE UNIT IS PUT BACK INTO OPERATION.
Section VI - ELECTRICAL
INTRODUCTION
This section covers procedures for the testing, removal
and repair of those electrical components used on
SNAPPER LT12D SERIES LAWN TRACTORS.
These electrical components include the keyswitch,
solenoid, seat switch, blade engagement switch, clutch
& PTO switch, and light switch. See Figure 6.1.
KEYSWITCH ———
'GROUND
CABLE
12V —
BATTERY
ENGINE
KILL WIRE
2
I
- fo
CABLE:
‘(Solenoid to Starter).
—T0
ALTERNATOR.
, -TOHEAD:
A “LIGHTS
>
4 рой
£2
Da ENGAGEMENT:
| SWITCH
SOLENOD \_
>
to
| £ | CABLE —
e > (Solenoid to Battery)
SEAT О °_
SWITCH —
CLUTCH/PTO —
SWITCH
Section VI - ELECTRICAL
6.1
PRELIMINARY CHECKS
A. Be certain ignition switch is in the "RUN"
position and the throttle control is in the
START position. See Figure 6.2.
—F THROTTLE CONTROL|- hw THE
* IN THE "START" OR I.
"CHOKE" POSITION
PLACE KEYSWITCH \
IN THE "RUN" POSITION ; P
6.2
A FH
pt
Place the blade ‘ engaging lever in the
DISENGAGED positio
Make certain the Shifter i is in the “NEU”
position.
Check fuel level in fuel tank, refill with
fresh fuel if necessary.
Depress clutch and attempt to start the
engine. |
(1) Starting attempts should not exceed
5 seconds per attempt until engine
starts.
F. Should engine fail to start, proceed with the
following to check for engine or electrical
failure.
mo 0 ®
ENGINE FAILS TO START
After following the steps as listed in 6.1 PRELIMIN-
ARY CHECKS, and engine insists on not starting,
use the following procedures for checking the
engine as the problem.
A. BRIGGS a : STRATTON ENGINE MODELS
| BRIGGS & STRATTON |;
JLLUSTRATED |
о
LL CARBURETOR
J LINKAGE pLATE
ТА "4 CATE …
1 ¢
—— ет о
о
о М
о
N
«
A
DISCONNECT SL a 7 (©
WIRE FROM \ = |
— FIGURE 6.3
(2) Attempt to start engine.
- (8) If engine fails to start, most likely the
problem is within the engine. Consult
engine repair manual.
B. ENGINE STARTS
If, after following the steps in paragraph A,
the engine starts, the problem is not the
engine. Proceed with the following inform-
ation for proper checking of the electrical
system and components.
6.3 GROUNDING OF THE ELECTRICAL SYSTEM
A. Most problems associated with the electrical
system is a result of poor grounding between
switches, screws and switch plate contact
points.
Always, before attempting in-depth compo-
nent testing, check the ground connections,
listed below, of the interlock system for proper
contact. Refer to Figure 6.1 for Electrical
Grounding Points.
GROUNDING CHECK POINTS
BATTERY GROUND CABLE
KEYSWITCH TO MOUNTING PLATE
KEYSWITCH TO ENGINE
SEAT SWITCH
BLADE ENGAGEMENT SWITCH
SOLENOID MOUNTING SCREWS
CLUTCH/PTO SWITCH
(1) After checking the grounding
points, attempt to start engine.
If engine fails to start, proceed
with the following component
testing procedures.
Section VI - ELECTRICAL
6. 4 ELECTRICAL SYSTEM COMPONENT
TESTING
For proper testing of all components of the
Electrical System, use an OHM meter in conjunction
with the following procedures for proper diagnosis of
defective component(s).
A.
KEYSWITCH TEST
The SNAPPER LT12D Series LAWN
TRACTORS incorporate a five terminal
Key Switch which controls “ON”, “OFF”
and “STARTING” of the engine. Should
a defective switch be suspected, use the
following information for proper testing
and diagnosis of the Key Switch.
Before testing, be certain of the function of
each terminal. See Figure 6.4.
A
7
"L' ——] - = "С" |
(¡NOTUSED)) | (C:(GREEN WIRE) -)
(BLUE WIRE)
wo”
. м яв
(BLACK WIRE) ¿y
ME. Son N
(YELLOW & RED WIRES), | 8
OC LI Y EX D OK E у)
FIGURE 6.4
(a) Terminal B - TO FUSE
(b) Terminal S - TO SOLENOID
(©) Terminal M - TO CLUTCH & PTO
| SWITCH 4 ENGINE GROUND
(d) Terminal G - SOLENOID GROUND
(e) Terminal E - NOT USED
Disconnect the terminal lead from the
Key Switch.
Connect the Red (+) lead of the tester to
the “B” (BATTERY) terminal.
Connect the Black (-) lead to the “S”
terminal.
Turn Key to “ON”, “START” and “OFF”
positions.
' The tester should show continuity only in
the “START” position.
47
10.
11.
12.
13.
14.
15.
16.
With the Red (+) lead connected to the “B”
(BATTERY) terminal, connect the Black (-)
tester lead to the “M” (MOTOR) terminal.
The tester should show no continuity when
the Key Switch is in all its positions, “ON”,
“START” and “OFF”.
Connect the Red (+) lead to the “M” terminal.
Connect the Black (-) lead to mounting nut
at front of switch plate.
There should be continuity only when key is
in the “OFF” position.
Connect the Black (-) lead to ground.
Connect the Red (+) lead to the “B” terminal.
There should be NO continuity to any key
positions.
Move the Red (+) lead from the “B” terminal
to the “S” terminal.
Meter should NOT show continuity in
any key position.
THE FOLLOWING TEST WILL DETECT ANY
BATTERY CURRENT BLEED TO ENGINE
WHICH MAY CAUSE ENGINE COIL AND IG--
NITION DAMAGE.
NOTE
17. Connect the Red (+) lead to the “S”
— terminal.
18. Connect the Black (-) lead to the “M”
terminal.
19. There shouid be NO continuity in any
key position.
20. Should the Key Switch fail any of the
above tests, it should be considered
defective and replaced with new part.
B. KEY SWITCH REPLACEMENT
1. Remove terminal lead from Key Switch.
2. Remove Bezel from Key Switch.
3. Remove mounting nut and washer from
Key Switch. Replace in reverse order.
_5** Figure 6.5.
- À N
EE J
Е 14 —
\\7 L— REMOVE NUT & PULL. |
\ ¡KEYSWITCH OUT FROM:
UNDER DASHBOARD.
REMOVE TERMINAL PLUG."
ONE,
NE pet ve
FIGURE 6.5
C.
1.
_ Section VI - ELECTRICAL
FUSE
Should the Key Switch pass all the Key
Switch tests, check the in-kne fuse.
\.
Cl
—
Es
EA
J ©
a Co
LBROKEN OR BURNED
ELEMENT INDICATES i|
B
AD FUSE: +)
Fn
>
NM =
. “
» 8
Connect OHM meter leads to the solenoid
FIGURE 6.6
if the fuse is found to be defective, replace.
Should the fuse be in good condition, clean
the contacts within the fuse holder and
replace fuse. H engine failg to start, move on
to the solenoid for testing.
SOLENOID TEST
The following solenoid tests should be .
performed using an OHM meter.
Remove BATTERY.
Remove the “+” (POSITIVE) battery cable
from solenoid.
Set OHM meter to highest resistance
setting. o
BATTERY and STARTER terminals.
Install either a new or good battery on
mower. Attach the “+” (POSITIVE) cable
to the small, push-on terminal on the
solenoid. You should hear a “CLICK” and
the meter should read "0" (ZERO) resistance-
or absolute continuity.
defective. Replace with new solenoid.
В
À LL
E. SOLENOID REPLACEMENT
1. Remove BATTERY.
2. Remove all wire connections from the
solenoid. See Figure 6.7.
SOLENOID,
Y
E Or \ |
; ED
~+SOLENOID MOUNTING
~ HARDWARE, ONE EACH SIDE "|, «
|
FIGURE 6.7
3. Remove the two (2) solenoid mounting
screws and remove solenoid.
4. Replace with new solenoid. See Figure
6.8 for proper wire connections.
— (+) BATTERY +
i | ` a A
FROM _ la
ALTERNATOR ye.
Ш {FROM |
| (STARTER !z
—SOLENOID
KE, SWITCH к”
¡KILL WIRE
FIGURE 6.8
Section VI - ELECTRICAL
SEAT SWITCH TEST & REPLACEMENT
Raise seat.
Connect leads from OHM meter to terminals
on switch.
Activate switch by hand and check for
continuity. See Figure 6.9.
a >» ою н*м
‘WATCH METER & fu & a.”
(ACTIVATE SWITCH. 12.1 {10 1% a a
En BYHAND | ‘ A
с SEAT: —
SWITCH:
wan a
D DISCONNECT —
“TERMINAL BLOCK‘
ct & ATTACH OHM *
1, METER LEADS ;
FIGURE 6.9
NOTE
ON PRE 1990 MODELS THE SEAT SWITCH
IS ADJUSTABLE. SEE FIGURE 6.10 FOR
PROPER ADJUSTMENT OF PRE 1990
MODELS SEAT SWITCH. |
= ———, PES
TL
pew oa . .
mA
e
a ADJUST UNTIL +.
т "ies OBTAINED
ee
"
res В
CEN
SWITCH ACTIVATING ==
=. BUTTON .
gh # Ë J
' +" LOOSEN,
e HARDWARE
SE abi
Ne (FIGURE 6.10 \
i no continuity is found, replace seat switch.
Remove terminal lead block from seat switch.
G. CLUTCH/?TO SWITCH TEST 4
REPLACEMENT
1. Remove terminal lead block from Clutch/
PTO switch. |
„2. Attach leads from OHM meter to L.H.
Terminals on Clutch/PTO switch.
3 Activate switch by hand and check for
continuity.
4. If switch is found to be faulty, replace.
H
BLADE ENGAGEMENT SWITCH
TEST & REPLACEMENT
1. Remove terminal lead block from blade
~ engagement switch.
2. Connect leads from OHM meter to L.H.
terminals of switch.
3. Activate switch by hand and check for
| continuity.
4. if switch is faulty, replace.
|. LIGHT SWITCH TEST &
REPLACEMENT
NOTE
IF HEAD LIGHTS ARE NOT FUNCTIONING.
FIRST CHECK HEAD LIGHT BULBS AND
REPLACE IF NECESSARY.
1. Remove terminal blocks from light switch.
2. Attach leads from OHM meter to terminals
on light switch.
3. Place switch in its “ON” position and
check for continuity. If found defective,
replace light switch.
6.5 BATTERY
A. NEW BATTERY ACTIVATION
1. Remove BATTERY from LT12D
Series LAWN TRACTOR.
CAUTION!
NEVER ATTEMPT POURING ELECTROLYTE
(ACID) IN A NEW BATTERY WHILE MOUNTED
ON THE MOWER.
2. Set Battery on a level surface.
3. Remove Vent Caps from Battery
and make certain Vent Holes are
open to allow gas to escape while
charging Battery.
NOTE
BATTERY AND ELECTROLYTE (ACID)
TEMPERATURE SHOULD BE AT LEAST
70 F. BEFORE FILLING BATTERY CELLS.
Section VI - ELECTRICAL
4. Wearing approved rubber gloves
and face shieid, fill each CELL of
the Battery with 1.2651 .05 specific
gravity, battery grade electrolyte
(acid). Fil each CELL to 3/16"
above CELL PLATES or between
full lines on clear batteries. See
Figure 6.11. |i.
CAL nea e |
FILL EACH CELL TO: C *- GC
3/16" ABOVE CELL PLATES 7 ий
WITH BATTERY GRADE | VA
dre: ELECTROLYTE. E ay
A 15
A |
oY
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—"
ут
IGURE 6.11;
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a
| WARNING!
NEVER OVERFILL BATTERY CELLS!
5. After filling, aliow the BATTERY to
set for at least thirty (30) minutes.
Check electrolyte (acid) level and
refill CELLS to 3/16" above CELL
PLATES if necessary. Refer to
Figure 6.11.
6. After achieving proper fill level.
SLOW CHARGE the Battery at
one (1) amp for ten (10) hours, or
three (3) amps for four (4) hours.
WARNING!
‘WHEN CHARGING BATTERY, THE ELECTRO-
LYTE (ACID) PRODUCES HIGHLY EXPLOSIVE
HYDROGEN GAS. MAKE CERTAIN THERE
ARE NO SPARKS, FIRE OR FLAMES IN THE
AREA WHILE BATTERY IS CHARGING!
7. Do not rely on the engine's charging
system for the initial charge of
BATTERY. |
WARNING!
NEVER USE BOOST CHARGERS TO
CHARGE BATTERY!
8. After proper electrolyte (acid) level
and charging have been achieved,
inspect BATTERY for leaks.
9. Clean outside of BATTERY and
instal! on mower.
(a) Using appropriate hardware,
securely strap BATTERY
into position.
10. Connect the POSITIVE (+) CABLE
Ш first to the BATTERY POSITIVE (+)
| TERMINAL. -
11. Connect the NEGATIVE (-) CABLE
to the BATTERY NEGATIVE (-)
TERMINAL.
12. Coat the BATTERY terminals with a
- thin coat of petroleum jelly or GP
grease to prevent corrosion.
13. Place COVER over the POSITIVE
(+) terminal.
14. When removing BATTERY, always
remove the NEGATIVE (-) CABLE
first, to prevent arcing from
accidental grounding while removing
the POSITIVE (+ CABLE.
1. Check. ctrolyte (acid) level. ¡If low
| istiled water until 3/16"
above plates is achieved in each
сей.
WARNING!
DO NOT OVERFILL. OVERFILLING OF
BATTERY CELLS CAN LEAD TO ELECTRO-
LYTE (ACID) SPILLAGE, CAUSING LOSS OF
ELECTRICITY AND/OR SEVER CORROSION
OF TERMINALS AND METAL COMPONENTS
OF MOWER.
2. Remove BATTERY and clean with
a solution of Baking Soda and Water
for removal of dirt and corrosion.
Refer to Step 14, above, for cable
removal.
3. Clean BATTERY TERMINALS and
CABLES with wire brush until TERM-
INALS, CABLES and MOUNTING
BOLTS are shiny.
4. Check the BATTERY VOLTAGE with
an OHM meter (VOM) set on DC volts.
Place the Red (+) lead of the
tester to the POSITIVE (+) terminal
and the Black (-) tester lead to the
NEGATIVE terminal on the BATTERY.
See chart below.
Section VI - ELECTRICAL
BATTERY VOLTAGE TEST
12 Volt a. BATTERY OK for Cranking
Reading System Tests.
b. Test BATTERY CABLES
for continuity.
Less Than a. BATTERY discharged or
12V defective. |
Reading b. Perform BATTERY main- -
tenance and HYDRO-
METER TEST. See
Page |
5. Should BATTERY check OK,
reinstall according to Steps 9
thru 13 of Part A.
6. if BATTERY check indicates a
5 discharged or defective
BATTERY, clean, refill to proper
level and recharge or replace
with new SNAPPER Dry Charge
Battery Kit.
pat 10 -
Po
gl" E cn
aE
| ©
51
NOTES
NOTES
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SNAPPER
SNAPPER POWER EQUIPMENT
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— SERVICE MANUAL 407218 (IR 8/90 ISSUE) Printed in U.S.A. =