Struck MINI-DOZER User manual

MINI-DOZER
Plans-AssemblyManual
t
ThesePlansaresoldsolely-fornon-Commercialpurposesandtheir
saleinnowaylicensesanyindividualorfirmtoreproducetheMini-Dozer
inanyformforresale.Todosowillconstitutedirectviolationofallpat-
entsapplicableatthattime.
ToreproducethesePlansandInstructionsinanyformwillconstitute
directviolationofourCopyright.
C.F.STRUCKCORP.
Copyright1977byC.F.StruckCorp.

PARTSLISTFORMD1200andMD1600SERIESTRACTORS
MD1200-1Body
1ALLeftBodyWall
1ARRightBodyWall
1BPlate(2)
1CFrontBrace
1DRearBrace
1EMount
1FPlate(4)
1GPan
1HSegment
1I Bar
1JBrace(2)
1KHandle
1LRod
1MBaffle(MD1207)
1NStrip(2)(MD12G7)
10RRightFootwell
10LLeftFootwell
1PPlate(2)
1QPlate(2)
1RClip
1SClip
2AGrill(MD12O7)
MD1200-2AGrill
-2BScreen
2BGrill& MufflerAssembly
(MD1200,1612and1600)
2AGrill
44Muffler
MD1600-2ABaffle
3AHood(MD1207)
3AHood
3BScreen
3BHood(MD1200,1612& 1600)
MD1200-3AHood
MD1600-3AScreen
4RearCover
4ACover
4BBracket
4CClip
5TankMount
5ABracket
5BGusset
6BatteryBox
6ASide
6BEnd
6CMountingBracket
6DAmmeter
6EIgnitionSwitch
6FLightSwitch(LightKitonly)
6HBattery(12voltw/acid,
instructions& Coverfor
PositiveTerminal)
6IWiringHarness
90°Elbow
6NWire(blue)65"
6PWire(yellow)68"
6SWire(heavyblack)67"
6TWire(red)68"
6JRetainingClips(4)1/2"dia.;for#6IHarness
6KBattery(-)Wire10"(heavyblack)
1/4"IDloopeachend.
6LBattery(+)Wire7.5"(heavyblack)
1/4"IDlooponeend;3/16"IDloopotherend.
6M Wire(red)4.5" w/fuse(LightKitonly)
60Wire(black)4"
6UWire(blue)8"(LightKitonly)
6VSealedBeamLight(2)(LightKitonly)
6WWire(green)10"
6XWire(black)10"
6YWire(red)15.5"(MD1207)
6ZWire(red)6.5"(MD1207)
6AASolenoid
6VATube(LightKitonly)
CapScrew1/4-20x 3/4(3)
CapScrew5/16-18x 3 (2)(LightKitonly)
CarriageBolt5/16-18x 7 (2)
SheetMetalScrews(4)
StarWasher5/16(2)(LightKitonly)
WIWasher1/4(3)
WIWasher5/16(2)(LightKitonly)
Lockout1/4-20(3)
Locknut5/16-18(2)(LightKitonly)
WingNut5/16-18(2)
ElectricalConnector1/2"dia.(1)
(LightKitonly)
ElectricalConnector3/8"dia.(1)
(LightKitonly)
7RearCover(Dash)
8FrontCover
9Strip
NOTE:Parts#6through#9applytoelectric
startenginesonly
10RBearing
10LBearing
10APlate(4)
10BTube(2)
1OCPull(2)
11Gusset(2)
12Axle(2)
13TrackExpander(2)
13AAPlate(2)
13BExpander(2)
14PivotRod
15RRightClutchControlHandle
15LLeftClutchControlHandle
15ATube(2)
15BHandle(2)
15CLever(2)
15DArm(2)
16ClutchBeltGuide(4)
17EngineBeltGuide(2)
18LightBracket(2)(ElectricLightKitonly)
19Drawbar
20ASprocket& Shaft8 Tooth#40(2)
(MD1207& 1200)
20AShaft(2)
40A8Sprocket(2)

MD1200-20BSprocket& Shaft8 Tooth#50(2)
(MD1612& 1600)
20BShaft(2)
50A8Sprocket(2)
21PowerShaft(2)
22ARearDriveWheel54Tooth#40(2)
(MD1207& 1200)
22ATube(2)
40A54Sprocket(2)
22ToothIronSprocket:(2)
22BRearDriveWheel54Tooth#50(2)
(MD1612& 1600)
22ATube(2)
50A54Sprocket(2)
22ToothIronSprocket
23Handle
23AHandle
23BBeltGuide
23CNut
24RRightMudFender
24LLeftMudFender
24AFender(2)
24RBrace(2)
24CGusset(6)
25FrontIdlerWheel(2)
25ATube(2)
22ToothIronSprocket(2)
26Self-AligningBearings,w/two
stampedmounting"shells"(4)
27IdlerPulley4"ODx 3/8bore
28IdlerWheel2"ODx 3/8bore
(4)- (MD1207& 1200)
(6)- (MD1612& 1600)
29Pulley12"CDx 7/8bore
(4)- (MD1207& 1200)
(6)- (MD1612& 1600)
30APulley5"x 3/4bore"V"
(2)- (MD1207& 1200)
(1)- (MD1612& 1600)
30BPulley5"0Dx 3/4bore"flat"
(1)- (MD1612& 1600)
31Pulley3"ODx 3/4bore
(4)- (MD1207& 1200)
(6)- (MD1612& 1600)
32APulley3"CDx 1 bore
(1)- (MD1207& 1200)
32BPulley3.5"0Dx 1 bore
(1)- (MD1612& 1600)
33AMainDriveBeltBB68(1)
(MD1207& 1200)
33BMainDriveBeltB67SC(1)
(MD1612& 1600)
34AClutchBelt4L500(4)(MD1207)
34BClutchBeltA48SC(4)(MD1200)
(6)(MD1612& 1600)
35Handgrips(2)
36Track-LawnShoesw/bolts& Chain(2)
37Track-DozerShoesw/bolts& Chain(2)
(Kitcomeswithonecompletesetof
eitherabovestyleshoe)
38ARollerChain#40w/connectorlink(2)
38BRollerChain#50w/connectorlink(2)
39AFlexibleExhaustTube3/4"ID(MD1207)
39BFlexibleExhaustTube1"ID
(MD1200,1612& 1600)
40Enginew/instructionbooklet
7hpLawson-TecumsehRecoilStart
(MD1207)
12hpLawson-TecumsehElectricStart
(MD1200& 1612)
16hpLawson-TecumsehElectricStart
(MD1600)
41Spring(tension- 8"long)
42ThrottleControl(long)
43ChokeControl(short)
44BulbMuffler(MD1207)
45GasLine
46SteelSeatPan
47BrakeAssembly
47AShaft
47BTube
47CPlate
47DStrip
48Pin
48Pin
WasherweldedtoPin
49Spring(tension- 3-3/4"long)(2)
50Spring(compression- 2"long)
51Switch("on-off")w/switchplate& Nut
(MD1207)
56BaffleAssembly(MD1200,1612& 1600)
MD1600-1ABaffle
MD1600-1BWall
SnapRing7/8(4)
SnapRing5/8(3)
WIWasher1/4(2)
WIWasher3/8(88)
WIWASHER3/2(45)
WIWasher7/8(110)
WIWasher5/16(110)
LockWasher3/8(14)
LockWasher5/16(15)
StarWasher3/8(1)
Nut3/8-16(10)
Locknut5/16-18(36)
Locknut1/4-20(10)
Locknut3/8-16(18)
WingNut5/16-18(8)
WingNut3/8-16(1)
CarriageBolt1/4-20x 1/2(8)
CarriageBolt3/8-16x 1 (4)
CarriageBolt3/8-16x 2.5(1)
CapScrew1/4-20x 1/2(2)
CapScrew5/16-24x 1 (2)(MD1207)
CapScrew5/16-18x 3/4(34)
CapScrew5/16-18x 1 (12)
CapScrew3/8-16x 3/4(6)
CapScrew3/8-16x 1 (11)
CapScrew3/8-16x 1/4(5)
CapScrew3/8-16x 1-3/4(1)
CapScrew3/8-16x 3 (2)
CapScrew3/8-16x 3.25(2)
CapScrew3/8-16x 4.5(2)
CapScrew3/8-16x 5 (2)
SetScrew5/16-18x 5/16(30)
CotterPin1/8x 1.5(2)
GasLinePinchClip(2)
RetainingClips1/2"(3)
Key3/16x 1 (12)
Key3/16x 3/4(2)
Key1/4x 1 (1)
AllenWrench3/32(1)
AllenWrench5/32
Collar7/8"(2)
HoseClamps(2)

MINI-DOZERASSEMBLY
(MD1200& MD1600Series)
UnpackingtheKit:
CaremustbeexercisedinunpackingtheKittoavoidbendingorscratchingthe
variouscomponents.Asthepartsareunpacked,laythemoutneatlyandcheckthe
partsagainsttheenclosedPartsList.Notifyusimmediatelyofanyshortages.
SettingupforAssembly:
ItisbesttosettheBodyinanupright positionontheedgesoftwosaw-horses
orontopofa crate.Thiswillallowyoutoeasilyworkaroundandunderneaththe
Tractor.NOTE:Thedirections'Left& Right'and'Upper& Lower'referredtoin
thefollowinginstructionsaredeterminedbystandingbehindtheDozerandlooking
forward.'Inside'referstothesideofa partwhichisclosesttoanimaginary
centerlinerunningdownthelengthoftheDozer.'Outside'referstotheside
farthestfromtheabovedefinedcenterline.(RemoveEnginefromBodyandsavebolts.)
Lubrication:
Lubricatethe"Zerk"fittingson#22DriveWheels,#25IdlerWheelsand#10Bearings
asyouproceedwiththeirrespectiveassembly.Allotherbearingsaresealedand"life-
time"lubricated.
NOTE:
1.TostandardizethemanufactureandservicingofourlineofMini-Dozers,we've
keptcomponentsasinterchangeableaspossiblebetweenthetwomodelseries(MD1200&
MD1600).Toclarifyyourunderstanding,pleasenotethatMD1200seriestractorscover
modelsMD1207& MD1200;andthatMD1600seriestractorscovermodelsMD1612& MD1600.
2.Asyouproceedthroughthevariousassemblysteps,notethateachsteprefers
toallmodelMini-Dozersunlessa specificmodelisnotedwithinthestep.
3.Itisrecommendedthata LiquidLockSealant beappliedtoALLsetscrews,cap
screws,nutsandanywhereelsethatisfeltnecessarytokeepallstationarytractor
partssnugandsecure.(NOTE:DONOTput on#20SprocketandShaft)
Assembly:
1.Slideone#12Axlethrough7/8"holesinrearofBody.Slide#22RearDriveWheel
oneachendofAxleandthenfollowwithtwo7/8WIWashersovereachRearAxleend
(largesprockettooutside).
2.Slidesecond#12AxlethroughforwardslotsinBody.OneachAxleend,slideon
approximatelyten7/8WIWashersfollowedby#25FrontIdlerWheel(sprockettooutside)
andfinallytwomore7/8WIWashersovereachendofFrontAxle.
3.Slide#13TrackExpandersoverendsofFrontandRearAxlesasperassemblydrawing
(slottedendofExpanderisforward).Slide7/8WIWasherovereachendoffourAxle
endsandsecurewith7/8SnapRings.(NOTE:7/8WIWashersmaybeaddedorremovedto
givebestpossiblefinalfitandalignment.Checkalignmentofeachsprocketwith
straightedge.Take3/8-16x 4-1/2CapScrewandslideon3/8WIWasher.SlideCap
ScrewthroughholeinfrontendofeachExpanderandthroughholeinFrontAxle.

DothistobothRight& LeftTrackExpanders.OnendsofeachCapScrew,looselyapply
two(2)3/8Nutswith3/8LockWasherbetween.Insert3/8-16x 3"CapScrewintoa
3/8WIWasherandthenthroughthetwoholesinrearofeachExpander(youmayhaveto
rotateRearAxlesoCapScrewwillpassthrough)andsecurewith3/8WIWasherand
3/8-16Locknut.NOTE:Donotover-tightenthisCapScrewandcrushtheExpander.
4.Take3/8-16x 1 CapScrewandinsertintoone"looped"endof#41Spring.Insert
thisCapScrewAssemblyintothe3/8"holeinloweroutsiderearof#1BPlate(right
"inside"ofBody)andsecureinsidewith3/8-16Locknut(seedrawingforcorrect
positioning).NOTE:InsertCapScrewsothatSpring's"looped"endcanlay"flat"
against#1BPlate.Ina similarmanner,attachtheother"looped"endof#41Springto
thetopinsideof#11Barandsecurewith3/8-16Locknut.NOTE:Inbothcases,leave
TheCapScrewssufficientlyloosetoallowtheSpringmoderateswivelingaction.
5.Attach#19Drawbarunder#1GRearPanwithtwo3/8-16x 3/4CapScrewsandsecure
inside#1GPanwith3/8WIWashersand3/8-16Locknuts.
6.TakeGasTankandMountingBracketAssemblyandmountonto#5TankMount- note
howthefourholesandslotsline-upwitheachother.Inserteachoffour5/16-18x 3/4
CapScrewsinto5/16WIWashersandthenintothe(above)alignedslotsandholes.
SecureeachCapScrewonothersidewith5/16WIWasherand5/16-18Locknut.
7.Mountthe(above)GasTankAssemblytothetoprearofTractorBodyaligningthe
two5/16"holesin#1DBraceandtwo5/16"holesinthe#1GPanwiththefourremaining
slotsin#5TankMount.Inserteachoffour5/16-18x 3/4CapScrewsinto5/16WI
Washerandfromoutside,insertintothefourslotsof#5Mount.SecuretheseScrews
insideBodywith5/16WIWashersand5/16-18Locknuts.
8.Mount#10Bearings(with10Ronrightsideand10Lonleftsideandwith10CPull
pointingup)between#lBPlateandtheirrespective#1ALor1ARLeftorRightinside
bodywall,beingsure#10CPullprotrudesupthrough1/2"holeintoprearof#1ARand
1ALWall.Looselysecure3/8WIWasherand3/8-16Locknuttoprotruding#10CPull.
NOTE:Holesin#10Bearingmustlineupwithslotsinitsrespective#1BPlateand#1AL
or1ARWall.Using5/16WIWashersover5/16-18x 3/4CapScrews,insertintoslotsof
#1BPlateand#1ALor1ARWall.Looselysecureinsidewith5/16WIWashersand5/16-18
Locknuts.
NOTE:CheckthataboveCapScrewson#1BPlateand#1ALor1ARWallpointtowardeach
otheroneachsideandthatLocknutsareagainst#10Bearingsineachcase.
9.Slidethree7/8WIWashersontotheendofeach#20SprocketandShaft.Fromout-
sidetheBody,inserteachshaftintotheOiliteBushingsin#10Bearings.Takea
straightedgeandalignthefacesofthe54toothSprocketonthe#22DriveWheelwith
the8 toothSprocketonthe#20Sprocket& Shaft.Thisalignmentcanbeaccomplishedby
addingmoreorremoving7/8WIWashersfromthe#20Shaft.
10.OneachsideofTractorbody,wrapa lengthof#38RollerChainaround8 tooth
Sprocket,on#20Shaftandaround54toothSprocketof#22DriveWheel- securewith
ConnectorLink.Drawuponeach#10BearingAssemblyandsecurebynowtighteningthe
six(5)5/16-18Locknutsoneach#10Bearing.
NOTE:Tighten3/8-16LockNuton#10CPulljustenoughtohold#10Bearinginplace,
butdonotover-tightenanddraw#10Bearingupanyfurtherasitwillcause#38Chain
tobeover-tightenedandresultinprematurewearofchain.(The#10CPullisjust
usedtokeepthe#10BearinginplacewhenDozerisworkingunderextremeloads.)

11.InstallationofChainGuards:Atthistime,ifyouhavechainguards,youmay
layoutanddrillthemountingholesperdrawing.Takefour5/16-18x 3/4CapScrews
andinsertintochainguardandthenintoholesjustdrilled.Inside1AWall,secure
with5/16WIWasherand5/16-18Locknut.Dothisforbothsides.
12.InsideBody,slideten7/8WIWashersovereachprotrudingendof#20Sprocket
andShaft.Insert3/16sq.x 3/4KeyintoeachKeywayandslideone#29Pulleyover
eachShaftendengagingthe3/16sq.Keycompletelyinhubof#29Pulley.Tighten
bothsetscrewsineach#29Pulley.Slidefivemore7/8WIWashersovereachendof
#20Shaftsfollowedbya 3/16sq.x 1 Keyandsecond#29Pulleyoneachside- tighten
allsetscrews.(OnmodelsMD1612andMD1600:slidefive(5)more7/8WIWashersover
eachendof#20Shaftsfollowedbya 3/16sq.x 1 Keyanda third#29Pulleyoneach
side- tightenallsetscrews.)Slipon7/8WIWashersnecessarytofillouteachend
of#20Shaftuptoeach1/8"hole- securewith1/8x 1-1/2CotterPin.NOTE:Hubs
of#29PulleysaboveshouldallpointtowardcenterofTractor- seedrawings.
13.Insert3/8-16x 1-3/4CapScrewinto3/8StarWasherand3/8WIWasher;thenfrom
inside,slipCapScrewinto3/8"slotin#1HSegment.Ontheothersideof#1HSegment
(sideclosestLeftBodyWall), youmaysliponseven3/8WIWashersfollowedby#27
IdlerPulley.(Atthistime,loopthe#33MainDriveBeltover#27IdlerPulley.)
SecurethisPulleyAssemblybyinsertingprotrudingendofCapScrewintonutweldedto
#23Handle.Checkyourassemblyagainstdrawing;makesure"handle"portionof#23
HandleispointingtowardcenterofTractorBodyandthat#33Beltisheldbetweenthe
grooveof#27Pulleyandthe1/4"roundrodweldedto#23HandleAssembly.Tighten
CapScrewsoitwillstillbeabletoslidefreelyin3/8"slotin#1H.
14.Assemblethe#30and31Pulleysontotheirrespective#21UpperandLowerShafts.
NOTE:
A.OnmodelsMD1200& MD1207,the#30Pulleysarebothofthe"V"type;onmodels
MD1612& MD1600,theupper#30Pulleyis"V"typewhilethelower#30Pulleyisthe
"flat"type.
B.OnmodelsMD1200& MD1207, two#31PulleysareontheUpperShaft,twoareon
theLowerShaft;onmodelsMD1612& MD1600four#31PulleysareontheUpperShaft,two
areontheLowerShaft.
C.Notethathubof#30PulleyspointinwardonbothUpperandLower#21Power
Shafts;alsothehubsofthe#31PulleyspointtowardeachotherontheLowerShaft,but
awayfromeachotherontheUpperShaft.
15.Assemble#26Self-aligningBearingsbyplacinga sphericalbearingunitbetweentwo
stampedmountinghalves- loosenallBearingsetscrewswithAllenWrenchprovided.
Mounttwooftheseassembliesinthe1-3/4"holesoninsideofleft#1ALBodyWallwith
1/4-20x 1/2CarriageBoltsprovided.Looselyapply1/4-20LocknutstoaboveBolts
whichshouldprotrudeoutleftsideofBody.NOTE:Bearing'shubs(withsetscrews)
shouldbetotheoutside.
16.FrominsideBody,insertthe"right"endsof#21UpperandLowerPowerShaftsa few
inchesintotheirrespective1-3/4"dia.holesonright#1ARBodyWall.(NOTE:On
modelsMD1200& MD1207,looptwo#34"V"BeltsonboththeUpperandLower#21Shafts;
onmodelsMD1612andMD1600,loopfour#34"V"BeltsoverUpperShaftandtwo#34Belts
overLowerShaft.)CheckthatLower#21PowerShaftdoesnotgothrough#33Belt;and
thatUpper#21PowerShaftdoesgothrough#33Belt.(NOTE:CHECK"BELTDIAGRAMS"FOR
PROPERBELTWRAPPING.)

17.Slideboththe#21Upperand#21LowerPowerShaftstotheleftandengage5/8"
"stepped"endsofShaftsintotheirrespective5/8"dia."bore"ofthepreviously
installed#26Bearings.PushShaftsfullytotheleftuntilShafts"steppedshoulder"
hitsbearing.
18.FromoutsideRight#1ARBodyWall,notethetworemainingendsof#21Upperand
LowerShaftsprotrudingthroughtheirrespective1-3/4"Bearingholes.Takethetwo
remaining#26Self-aligningBearings(assembledinStep#15)andwithhubofBearing
pointingoutward,engagethe5/8"dia.boreofBearingsonto"stepped"endsof#21
ShaftsandslideBearingstightagainst theoutsideof#1ARBodyWall.Notethegap
betweenshoulderof#21Shaftsandthe"face"oftheirrespective#26Bearing.
Determinehowmany5/8WIWashersarenecessaryto"shim"thisgap- thenremoveboth
Bearings,addshimWashers(equalnumberofWashersonendsofeachShaft)andre-
mountBearingsonShafts.Checkforpropershimming(donot"force-in"extrawashers)
andthenfromoutsideBody,insertfourremaining1/4-20x 1/2CarriageBoltsinto
BearinghousingsandsecureinsideBodywith1/4-20Locknuts.Tightensetscrewsin
both#26Bearingsandalsotighten1/4-20LocknutsholdingBearings.
19.Lockall#26BearingSetScrewsandcheckforsmoothrotationof#21Shafts-
removesome5/8WIWashersifyou'vefoundthey"wedgeorbind"Bearings'freerotation.
Insert 3/16sq.x 1 KeysineachPulleyhubengagingthe3/16slotintheirrespective
#21UpperorLowerPowerShaft.
20.Alignthetwo5"dia.#30Pulleyswiththepreviouslymounted#27IdlerPulleyso
theyallhavea commonverticalcenterlineandthis"centerline"isparallelwiththe
insideof#1ALBodyWall;thentightensetscrewsin#30Pulleys.Nextalignthe#31
Pulleyswiththeirmating#29Pulleysmountedon#20Shafts.(NoteDrawingstocheck
that#31PulleysonUpper#21Shaftalignwithmating#29Pulleysmountedtotheoutside
on#20Shafts.Alsocheckthatthe#31PulleysonLower#21Shaftalignwithmating#29
Pulleysmountedtotheinsideon#20Shafts.)Tightenallsetscrews.Slip#34Belts
aroundmatingPulleysperabovealignmentinstructions.
21.Assemble#15Rand15LClutchesatthistime- checkDrawingstonotedifference
between#15Rand#15L.
A.OnmodelsMD1200& MD1207:Using3/8-16x 3-1/4CapScrewwith3/8WIWasherover
oneend,slideinto#16Belt Guide.Followwiththree3/8WIWashers,slideinto#28
IdlerWheelandfollowwithfourmore3/8Washers.Nowslideintoslotinarmof#15R
RightClutch.Onotherside,sliponfourmore3/8Washers,#28IdlerWheel,three3/8
Washers,#16Belt Guide,3/8WIWasherandsecurewith3/8-16Locknut.
B.OnmodelsMD1612& KD1600:Using3/8-16x 5 CapScrewwith3/8WIWasheroverone
end,slideinto#16BeltGuide.Followwiththree3/8WIWashers,slideinto#28Idler
Wheelandfollowwithfourmore3/8Washers.Now,slideinto"outside"ofslotinarm
of#15RRight Clutch.Or.otherside,sliponfourmore3/8WIWashers,#28IdlerWheel,
elevenmore3/8WIWashers,andthird#28IdlerWheel.Sliponthreemore3/8WIWash-
ers,#16BeltGuide,3/8WIWasherandsecurewith3/8-16Locknut.(Checkassembly
Drawingsatthistimetomakesureyouhavethevariouspartsassembledintheproper
orderandthatthe#16BeltGuides- specificallythe"90°hookedends"- arefacingthe
properdirection.)Alignthe#16Guidessotheymakeapproximatelya 90°anglewith
theslottedarmofthe#15RClutchandthenlooselytighten3/8-16Locknut.
22.Repeatpreviousstep,but thistimeassembling#15LLeftClutch.Using3/8-16x 1
CapScrews,attachoneendofeach#49Springtotheoutsideofitsrespective#15DArm•
securewith3/8-16Locknut butleavesufficientlyloosesotheSpringmayrotatefreely
onCapScrew.(Note:InsertCapScrewsothatSpring's"looped"endcanlay"flat
against#15DArm.)

23.Insertabove#15Rand15LClutchAssembliesintorespectivelocationsinsideBody.
FromoutsideBody,slide#14PivotRodthroughBodyWall,thenthroughtubeoneach
Clutch,andfinallythroughotherBodyWall.(CHECK"BELTDIAGRAMS"FORPROPER#34
BELTWRAPPINGOVER#28IDLERS.)NotethatClutchAssemblieshavefreedomtoslideleft
andrightonthe#14Pivot.AtthistimebyslidingClutchesleftandright,alignthe
#28IdlerWheelswiththeirrespective#29Pulleysmountedon#20Shafts.Remove#14
PivotRodandattachremainingendsof#49Springstotheirrespective"inside"position
of#1SClipusing3/8-16x 1 CapScrewsandLocknutssimilarlyasinStep#22.(Again,
checkthatallendsof#49Springscanrotatefreely!)Reinsert#14PivotRodinto#15R
and15LClutchAssemblies;thistimeusing5/8WIWashersasshimsalong#14Rodtohold
theClutchalignmentdeterminedabove.Fromoutsideof1ARand1ALBodyWallsecure#14
PivotRodwith5/8SnapRings.
24.Nowyoumustproperlyadjust#28IdlerWheelassembliesyouassembledabove.Slide
Wheelassembliesrearward(orforwardasthecasemaybe)sothattheClutchControl
Handlescanmoveforwardandbackwarda totaldistanceofapproximately4"asmeasured
atthe"handgrip"endsof#15ControlHandles.MakethistravelequalinbothControl
Handlesandthentighteneach3/8-16x 3-1/4CapScrew(3/8-16x 5 CapScrewonMD1612&
MD1600).(Checkforproper90°angleof#16GuidesasexplainedinClutchAssemblyStep
above.)NOTE:Checktomakesurethatallfour#16Guidesridewiththeir"90°hooked
end"totheoutsideoftheir#34Belt.Inproperoperation,asa #28IdlerWheelmoves
awayfromtighteninga #34Belt,simultaneouslythe"90°hookedend"ofitsrespective
#16Guideshouldstarttohitthebacksideofthe#34Beltandstarttopullit"in"to
eliminateanyexcessiveslackandreleaseitsgripon#31Pulley.
25.TakeEngineandslideon"hubfirst"#32PulleyontoEngine'sCrankshaft.Slide
1/4sq.x 1 KeyintoPulley'shub.
A.On7 hpEngine:Installthetwo#17BeltGuidesusinga 5/16LockWasherand
5/16WIWasheroverendsoftwo5/16-24x 1 CapScrewswhichareeachinsertedinto
"loopend"of#17BeltGuides.Followwithsecond5/16WIWasheroneachandthenscrew
eachGuideAssemblyintothetworear5/16-24threadedholesinEngineCase- see"7hp
Engine- PTOView"Drawingforproperassembly;notethat"90°hookedends"of#17Belt
GuidespointawayfromEngineCase.
B.On12and16hpEngine:Take#56Baffleandalignitstwo3/8holesoverthe
toptwo3/8-16threadedholesintheengine'sface.Insert3/8-16x 1-1/4CapScrew
intoa 3/8LockWasherfollowedbya 3/8WIWasher.Insertinto"loop"ofone#17Belt
Guide(90°"hooked"endpointingawayfromengine)andthenintorear3/8holeof#56
BaffleengagingScrewin(above)alignedthreadedholeinengineface.Insert3/8-16x
3/4CapScrewina 3/8LockWasherandthena 3/8WIWasher;insertintoremaining
forward3/8holeinBaffleandengagethreadsinengineface- Tighten.
Insert3/8-16x 1 CapScrewinto3/8LockWasher,3/8WIWasher,andtheninto"loop"
ofsecond#17BeltGuide.Screwthisassemblyintolowerrear3/8-16threadedholein
engine'sface- keep90°"hooked"endpointingawayfromengine.(NOTE:CheckEngine
AssemblyMD1200,MD1612& MD1600drawingforproperassemblyofthisstep.)
26.InstallEngineinEngineCompartmentofTractorkeepingtheCrankshaftonleftside.
A.Mount7 hpEnginetoBody's#1EMountwithfour5/16-18x 1 CapScrewsand5/16
WIWasherscomingupfromundersideof#1EMountandengagingfourholesinmounting
plateofEngine.Secureabovewith5/16WIWashersand5/16-18Locknuts.

B.Mount12& 16hpEnginewith3/8-16x 1 CapScrewsandLockWasherscomingupfrom
undersideof#1EMountandengagingthe3/8-16threadsinbottomofengine.Inbothcase;
abovesquareEngineinBody(Crankshaftshouldbeatapproximatelya 90°anglewiththe
insideoftheleft#1ALBodyWall)andthentightenthefourCapScrews.Atthispoint,
loopthe#33DriveBeltaroundthe#32Pulley.
27.Slide#2GrillintofrontofBodyandalignthefour3/8"holes.Insert3/8-16x
1-1/4CapScrewinto3/8WIWasherandthenfromoutsidebody,insertcapscrewintoeach
ofthefour3/8"holes.Ontheinside,securewith3/8WIWasherand3/8-16Locknut.
NOTE:Ifyouhavethelightkit,installthe#18LightBracketsontheoutsideofBody
Wallsusingtheaboveassembly.(CheckDrawing).
28.Insert #42ThrottleControlintothe9/16"holeontheleftof#1CBrace.Secure
belowwithLockWasherandNutprovided.Usingthe"ThrottleControlWire"Drawingfor
yourparticularEngineHorsepower,slidethewire"casing"intoitsrespectiveBowden
WireClampattheThrottleonEngine.EngagetheoffsetendofBowden's"innerWire"
intothe1/16"holeinyourparticularEngineThrottlelever. With#42ThrottleControl
Handlepushedallthewayin,theThrottleLevershouldbepushedtotheslow(idlepo-
sition)sothatthethrottleonthecarburetorisclosedandrestingagainsttheidle
adjustmentscrew.Now,tightentheBowdenWireClamp.
29.On7 hpEngine(only):Attachthe3/16IDloopendsof#6Zand6YWiresto#51
(on-off)Switch.(NotewirepositionsinDrawing)frominsideTractorBody,insert
Switchintoleftfront1/2"holefollowedby "on-off"switchplate.TurnSwitchso
"on"isforwardandsecurewithnutprovided.CheckStep#28:PullinguponHandle
of #42ControlshouldopentheThrottleLeverto the"fast"position.(NOTE;To hold
aparticularThrottlesetting,givethecontrola 1/4turntolockinplace).
30.Insert theshorter#43ChokeControlintotheremaining9/16"holeonrightof#1C
Brace.SecurebelowwithNutandLockWasher.RunControl"casing"rearwardandloop
aroundinside#1MBaffleandinsertintoBowdenWireClampmountedtoclipboltedto
Engine'shousing.Engage"offsetend"ofBowden'sInnerWireintoholeonEngineChoke
Leverabovecarburetor.(NOTE:Donot useholeinmiddleof"arrow"onChokeLever.)
With#43ChokeControlpushedin,theChokeLevershouldrotatetowardtheAirCleaner
andstop.Atthispoint,tightentheBowdenWireClamp.CheckChokeControl,pulling
out#43ControlHandleshouldrotateChokeLeversothatitstopsata pointperpendi-
culartotheengineCrankshaft.
31.On7 hpEngineonly;PulluponEngineStarterRopeandtiea "loopknot"tokeep
itfromretracting.RemoveHandlefromropeandinsetropethrough3/8"grommetabove
recoilstarter.ReassembleHandleonropeendandremoveknot toallowropetorecoil.
Insert"plug"endof#6YWireonto"spade"terminalmountedtoEngineframelocated
beneathgastank.
32A.Exhaust7 hpEngine:Following"EngineAssembly"- MD1207drawing,screw3/4x 1"
ReducerNippleonto1"pipeNippleweldedto#1EMount.In3/4"endofReducer,screwin
3/4"PipeNipple- tightenboth.Take3/4"insidediameter#39FlexibleExhaustTubeand
insertoverthe3/4"NippleonReducer;takeotherendof#39Tubeandslipoverthe3/4"
PipeNipplescrewedinto45°StreetElbowonEngine.Screw#44BulbMufflerontoendof
1"PipeNipple(protrudingbelowbottomof#1EMount)astightlyaspossible.
B.Exhaust12& 16hpEngine:Following"EngineAssembly"- MD1200,MD1612and
MD1600drawing,take1"insidediameter#39FlexibleExhaustTubeandinsertoverthe1"
PipeNipplecomingfromengine'sexhaust;takeotherendof#39Tubeandslipoverthe
1"StreetElbowcomingfrommufflerassemblyweldedto#2GrillAssembly.

NOTE:Itwillhelpifbeforeinstallationyougriponeendofthe#39Tubewithyour
lefthandandtheotherendwithyourright;thenviewingeitherendoftheTube,twist
itclockwisethiswillincreaseitsinsidediameterandmakeitslipeasilyoverits
respectivePipeNipples.Afterinstallation,twisttheTubeendscounter-clockwiseand
theywillgriptheNipplesfirmly.SecurebothendsofTubewithHoseClampsprovided.
33.Onelectricstarttractors,place#6BatteryBoxinrearofLeft#10LFootwell.
Aligntheholesandslotin#6CBraceonbottomof#6Box withthe5/16"holesin#10L
Footwelland#1ALBodyWall.Inserteachoftwo5/16-18x 3/4CapScrewsinto5/16
LockWasherandtheninto5/16WIWasher.TaketheseScrewsandinsertthemintothe
twoholesin#6CBraceandpassthroughthe"aligned"5/16"holesin#1ALBodyWall.
SecuretheseScrewsinsideBodybyengagingthemintothetwo5/16-18threadedholesin
#11Gusset- Tighten.(CheckDrawing- makesure7/8"holein#11Gussetisvisibleat
endof7/8"slotin#1ALWall.)
34.Ifyoudonothaveelectricstarting,justassemble#11Gussetasperabove,but
eliminatereferenceto#6BatteryBox.OnrightreartopsideofBody,mountsecond#11
Gussetusingsame"CapScrew"procedureasinStep#33.NOTE:This"rightside"#11
Gusset must beremovedandits7/8"holeslidontolifthandleof#BH-100RearHitchor
ML-40LiftMechanismwhentheseattachmentsareused.Afterbeingslidontoitsres-
pective"lifthandle",the#11Gussetmustbereinstalledon#1ARBodyWall- boltedto
theinsideofWallfor#BH-100Hitch;boltedtooutsideof#1ARWallforML-40Lift.
35.AssemblyforElectricStartandLights:
NOTE:Beforeassembly,readtheseinstructionsthoroughlyasimproperassemblymaylead
todamageoftheelectricalsystem.
A.Mount#6ESwitchinto5/8"holeinleftrearof#7Cover.MountfrombelowCover
andkeeplockwasherbehindCoverandontop- securewithNut.(SeeWiringDiagram
forproperlocationofterminals.)Using1/4-20x 1/2CapScrews,WIWashersandLock
nuts,install#6AASolenoidtothelowerinsiderearwallof#6BatteryBox- keepdim-
pledendupward.(NOTE:KeepheadsofCapScrewsinsideBox withCapScrewendspro-
trudingoutofBox.)
B.Mount#6FSwitchin3/8"holeincenterfrontof#7Cover.Mountfrombelow,keep
nutsoneoneithersideof#7CoverandtrytokeepthreadedportionofSwitchfrom
protrudingabovenutontopofCover. (SeeWiringDiagramforproperlocationof
terminals.)
:.Mount#6DAmmeterfromtopof#7Coverinto2-1/8holeinrearleftof#7Cover.
5ecure(behindCover)byslippingthe"yoke"assemblyovertwoscrewendsprotruding
fromrearofAmmeter.Screwsecurelyonenut overeachscrewend.(NOTE:Checkthat
plasticinsulatorsareproperlyinstalledin"Yoke"assemblyandthatthe(above)two
nutstouchonlytheseinsulatorsanddonotmakemetaltometalcontact withanyportion
ofthe"Yoke".)
.Takeendof#6IWiringHarnessextendingfrombottomof#6BatteryBoxandrun
looselyalongtopinsideofleft#1ALBodyWallkeepingharnessbehindandgoingpast
1MBaffletoEngineStartingMotor.
.Itisadvisableatthistimetowrapelectricaltapealongthecompletelengthof
6IWiringHarnesstomakeitneatlookingandtogiveitaddedabrasionresistance.

F.Take(heavyblack)#6SWire(in#6IWiringHarness)andconnectits1/4"IDloopto
1/4-20terminalonstartingmotorofengine- Tighten.Connect5/16"IDloopendof#6S
Wiretothe(leftside)ofthe5/16-18terminalon#6AASolenoid- Tighten.
G.ConnectthetwoprongSquarefemaleplugof#6IWiringHarnesswiththematingmale
plugfoundprotrudingalongsideStarteronengine.NOTE:The#6Tredwireandthered
wirefromtheengineshouldalignwitheachotherintheplug.Connectthefiveprong
blackfemaleplugontheotherendof#6IWiringHarnesstothefiveprongsprotruding
fromthebottomof#6ESwitch.
H.Sliptheloopofthe(red)#6TWireof#6IHarnessoverprotrudingscrewon(+)
sideof#6DAmmeter.Followwitha 3/16"IDloopfrom(red)#6MWireoversame"pro-
trudingscrew"aboveandsecurewithLockWasherandNutprovidedwithAmmeter.Connect
remainingendof(red)#6MWiretooneterminalof#6FSwitch.Connectone3/16"IDloop
endof(black)#60Wireto(-)"protrudingscrew"on#6DAmmeterandsecurewithLock
WasherandNut.(NOTE:The(+)and(-)screwsaredeterminedbylookingatthe(+)and
(-)marksonthefaceof#6DAmmeterandselectingthecorrespondingscrewbelow.)
I.Slip5/16WIWasherontoendof5/16-18x 3 CapScrewandinsertintoonesideof
"loopedbracket"on#6VLight,theninto6VATube.InsertCapScrewendofthisassembly
intoa 5/16StarWasherandthenintothe3/8"holeontopoutsideof#18Bracket.
Secureonothersidewith5/16-18Locknut.(Dothisforbothlights.)Clean1/2"in-
sulationfromwirecomingoutbottomof#6VLightsandinsertwiresintogapbetweenun-
dersideof#1GBraceandtopof#2Grill.
J.Connect3/16"IDloopendof(blue)#6NWiretoremainingterminalof#6FSwitch.
Clean1/2"ofinsulationfromeachendof(blue)#6UWireandfromremainingendof(blue)
#6NWire.Windtogetherthewireendsof#6VLight(leftLightonly),theremainingend
of(blue)#6NWireandoneendof(blue)#6UWiretoforma "pigtail".Slipthe1/2"dia.
ElectricalConnectorovertheabove"pigtail"andscrewitontightlymakingsurenoneof
the"pigtail's"wiresareexposed.Similarly,connectremainingendof(blue)#6UWire
towirefrom#6VLightonrightsideandscrewon3/8"dia.ElectricalConnector.
K.Take5/16IDloopendsof#6W(green)and#6L(heavyblack)wiresandsliponto
5/16-18terminal(rightside)of#6AASolenoid- Tighten.Connect#6X(black)wirefrom
#6ESwitchto"center"(forward)3/16terminalof#6AASolenoidandsecure.Insert
1/4-20x 3/4CapScrewintoupper1/4"holein#6Box.Take1/4"IDloopof(heavyblack)
#6KWireandslipontothe1/4-20x 3/4CapScrewinsideboxandsecurewith1/4-20Lock
nut.(NOTE:Scrapesomepaintoffaroundthe1/4"holein#6Boxsothatthe1/4-20x
3/4CapScrewmakes"metaltometal"contactwiththeBatteryBox.)
L.Fill#6HBatterywithacidpertheenclosedinstructions.InsertBatteryinto#6
BatteryBox(+& - terminalsonrightsideofBox)andsecurewith#9Stripheldtotop
ofBatterybytwo5/16-18x 7 CarriageboltswhichpassthroughthebottomofBoxandare
securedoutsideandbelowboxwith5/16-18WingNuts.
M.Insert1/4-20x 3/4CapScrewinto1/4"IDloopof(heavyblack)#6LWireandinsert
thisinto(+)terminalof#6HBattery- securewith1/4WIWasherand1/4-20Locknut.
MountplasticTerminalCoveroverthe(+)terminalofBattery- notehow#6LWirefits
intoslotprovidedforitinthenarrowendofTerminalCover.Insert1/4-20x 3/4Cap
Screwintoremaining1/4"IDloopof#6KWireandinsertScrewinto(-)terminalof#6H
Battery- securewith1/4WIWasherand1/4-20Locknut.(NOTE:ForTractorswithout
LightKit,fill3/8Holein#7Coverwith3/8-16x 3/4CapScrewandLocknut.Alsoapply
electricaltapetoendsoftheunused(blue)#6NWire.)

N.Yourwiringisnowcomplete- usethisopportunitytocompletelygoovertheabove
assemblyinstructionsandcheckforanywiringmistakes.(NOTE:Toimproperlywire
yourTractorwillruntheriskofalmostimmediate"burnout"ofAlternator,Regulator-
Rectifier,etc.)ChargeBatteryatthistimeusingstandard12voltCharger.Mount
#8FrontCoverover"front"of#6Boxandsecureoneachsidewithtwoofthesheet
metalscrewsprovided.
0.Carefullybring#7Coverdownonto#6BoxandwithtwoSheetMetalScrewssecure
eachsideof#7Covertosidesof#6Box.(NOTE:Toavoidanypossibleshortingfrom
wiresinadvertentlytouchingeachotherortheBox,itisadvisabletotakeelectrical
tapeandcoverallexposedterminalsonAmmeterandSwitches.)
36.Slipfourplasticcoated#6JRetainingClipsoverthe#6IWiringHarnessatthe
fourlocationsof5/16-18WeldnutsweldedtoundersideofLeft#1ALBodyWall.Note
thattheClipsareinstalledsothattheirflatside(slotside)willlieflatagainst
theundersideoftheWeldnut,andtheir"coatedclip"portionwilllietotherightof
theWeldnut.Oneachoffour5/16-18x 1 CapScrews,sliponone5/16LockWasher
followedbythree5/16WIWashers.FrominsideTractorBody,inserteachoftheseCap
ScrewAssembliesintoundersideofeachoftheaboveRetainingClipsandengagethreads
of5/16-18Weldnuts.Smoothoutthe#6IWiringHarnessheldbytheseClipsandforma
smoothpathfrom#6BatteryBoxtotheengine.(MakeRadiusaroundcornerssmoothand
sweeping- donotkinkWiringHarness.)Tightenthe(above)fourCapScrewsandnotice
thatyounowhavethetipsoftheCapScrewsprotrudingoutthetopof#1ALWallatfour
locations.(NOTE:FortractorswithoutelectricstartingEngines,omitaboveStepand
insertthefollowing;slipone5/16LockWasherfollowedbyfour5/16WIWashersover
eachendoffour5/16-18x 1 CapScrews.ScrewtheseCapScrewsintothe"bottom"of
eachofthe5/16-18WeldnutsweldedtoundersideofLeft#1ALBodyWallandtighten.
NOTE:Insertleftfront5/16-18x 1 CapScrewinto5/16IDloopterminalof#6ZWire
beforeinsertingintoitsrespectiveWeldnut- Tighten.
37.Take#45GasLineandslipa PinchClipovereachendandslideupabout1".Slip
oneendoftheGasLineoverthe"taperedstepped"outleton"petcock"onundersideof
GasTank.ConnecttheotherendofGasLinetothe"taperedstepped"inletonright
topsideofEngineCarburetor.Onbothends,pushGasLineonasfarasitgoes.With
plierscarefullycompresstheendsofthePinchClipsandslidethemtoapproximately
3/8"fromeachendofGasLine.
38.SlipthethreeremainingplasticcoatedRetainingClipsoverthe#45GasLineat
sameintervalsasthelastthree5/16-18Weldnutsonunderside(rear)ofRight#1ARWall.
SimilartoStep#36,assemble5/16LockWasherandthree5/16WIWashersovereachend
ofthree5/16-18x 1 CapScrews.Inserteachin"slotside"ofclipandengageunderside
ofitsrespectiveWeldnut.CheckthatGasLinefollowsa smoothpathfromGasTankto
CarburetorandthattheRetainingClipslieflatagainsttheundersideofitsrespective
WeldnutmakingsureGasLineiskepttotheleftoftheCapScrews.Tightenthethree
CapScrews.Insert5/16-18x 1 CapScrewinto5/16LockWasherandthenintofour5/16
WIWashers;tightlyscrewthisintotheremaining(furthestforward)5/16-18Weldnuton
undersideof#1ARWall.
39.On#55O-K19HeavyDutyTrackChain,connectlengthstogetherusingConnectorlink
providedandsecurewithcotters.(Checktomakesurethat"offset"tabsoneachlink
areoffsettotheoutsideoftheTracksothattheTrackShoesmayboltflatlyagainst
eachlink.)LoopabovechainaroundFrontandRearWheels#25and#22.Withboth
TrackChainsinplace,drawuponthetwo3/8-16x 4-1/2CapScrewsin#13Expanders
totightentheChains;thenlockinplacewithremaining3/8LockWasherandNut.

40.NowbeginboltingtheTrackShoesontotheDriveChainusingthe1/4"Carriage
Bolts,LockWashers,andnutsprovided.NOTE:Shoesmustbekeptsquarewithan
imaginarylinerunningfromtheFrontWheeltoRearWheel;alwayscheckthisalignment
asyouareputtingontheShoessothatthefinaltrackwillruntrue.TheLawnShoes
mustbeboltedonwiththebentendsalwayspointingtotheinsideoftheTrack.The
DozerShoesmustbeboltedonsothat the"gripping"edgeoftheShoeisalwaystothe
outsideandthe"rolled"edgeoftheShoeistotheinsideandpointstotherearwhen
itisontheground.(SeeDrawing).
41.Locatethe#46SteelSeatPansuchthatitsfour7/16"holesalignwiththefour
3/8"holesinthe"Channel"Bracketontherearof#4Cover.(NOTE:Youmayadjust
SeatForwardorRearwardbyutilizingonlytwo3/8"holesinbothcasesmountwith
3/8-16x 1 CarriageBolts,securebelow"Channel"bracketwith3/8-16NutsandLock
Washers.)Onoptionalfoamcushionmodels,workthecushionfortheSeatoveritsSeat
PanmakingsuretheextrapiecesoffabricatCushion'scornersarekeptoverthe"sharp"
cornersofsteelSeat Pan.DrawupendsofSeat'sdrawstringandtie.
42.Locate#24Land24RLeftandRightMudFendersundertheirrespective#10Land10R
LeftandRightFootwells.LineuptheslotsinFenderswiththeirmating5/16"holes
inFootwells.Slip5/16WIWasherovertheendofeight5/16-18x 3/4CapScrewsand
insert(frombelowFender)intotheslotsofFendersandengagetheirrespective5/16"
holeinFootwellsabove.Secureabovewith5/16WIWasherandLocknut.(NOTE:"Rear-
most"CapScrewin#24LFendergoesnotonlythroughtheFenderslotandFootwellhole,
butalsothroughtheslotinthe#6CBraceholding#6BatteryBoxabove- similarly
secureabovewith5/16WIWasherand5/16-18Locknut.)
43.Insert#47BTubeof#47BrakeAssemblyinto#4CClipweldedtotheundersideof
#4ACoverandinsert #48Pinandsecurewith5/8SnapRing.(NOTE:#47DStripmust
befacingundersideof#4ACover).Insert3/8-16x 2-1/2CarriageBoltinto3/8"sq.
holeinundersideof#47CBarandinsertinto#50Spring.Insert CarriageBoltAssembly
intoundersideofforward3/8holeof#4ACoverandsecureabovewith3/8-16WingNut.
44.IMPORTANT:OnModelsMD1200,1612and1600- attachBlackEdgingtotheexposed
edgeof#3BScreenon#3Hoodcoverasfollows:
A.CutEdgingintotwolengths- each13%"long.
B.Startingwiththeleftrear"exposededge"of3BScreen,presstheopen"V" shaped
partofoneendofa cutlengthofedgingontothe"exposededge"oftheScreen.Con-
tinuetopressonedgingasyouworkyourwaytotherighthandsideofthe"exposed
edge"of#3BScreen.NOTE:BesurethattheBlackEdgingisfirmlyattachedtothe
exposededgeof#3BScreentopreventtheedgingfromfallingoffduringoperationof
theDozer.
C.Dothesametothe"forwardexposededge"of#3BScreen.
FinalCheckofAssembly:
Atthispoint,youmustnowgocompletelyovertheaboveassemblystepstomakesure
thatyouhaveneitheromittedparts,norinstalledanypartsincorrectly.Withspark
plugonEnginecompletelyremovedfromEngineandignition,wire,youmaynowtestyour
completeTractordrivetrain.
A.Thefirststepistocheckthatwhen#1K"auxiliaryclutch"Handleispulledforward
andengagedinfrontof#1RClipthatitissufficienttoreleasetensionon#33Drive
Beltsothatthe#32EnginePulleymayrotatefreelywithinthe#33Belt therebycausing
absolutelynomovementof#33DriveBelt.

Thedegreeoftensionin#33Beltisdeterminedbythelocationof#27IdlerPulley
in3/8"wideslotof#1HSegment.SlidingtheIdlerPulleyforwardwilldecreasetension;
slidingitrearwardwillincreasetension.Whenyouhavearrivedatthepositionwhich
properlyreleases#33Belt,youmaythentightenthe3/8-16x 1-3/4CapScrewholding#27
Pulley.(NOTE:WhentighteningthisCapScrew,hold#23Handletoresistrotationand
checkthatwhenCapScrewis"tight"the#23HandleisparalleltobottomofTractor.
Inaddition,werecommendthatthe"tension"on#33DriveBeltbekeptsomewhat"loose"
initiallyastheBeltbeingnewandnotbrokenin,maybe"sticky"andnotwillingtore-
leaseits"wrap"on#32EnginePulleyquiteasquicklyasitwilllater.NOTE:After
afewhoursofuse,youwillnoticethe#33Beltgettingsomewhatshinyand"broken-in";
atthattime,youmayresetthetensionof#27IdlerPulleytoa finerdegreeandelimi-
nateanychanceofthe#33Beltinadvertentlyjumpingoffitspulleys.
B.With#1K"AuxiliaryClutch"Handlereleasedfromitspositioninfrontof#1RClip,
itwill(under#41Spring'stension)gorearwardandtherebytighten#27IdlerPulley
within#33DriveBelt.With#33Beltundertension,rotatethetwo#17BeltGuidesrear-
wardsuchthattheyareapproximately1/8"awayfromoutside(orbackside)of#33Belt.
TightenthetwoCapScrewstoholdthe#17Guidesinthisposition.Similarlywith#33
Beltundertension,align#32EnginePulleywith#30and27Pulleys;thentightenall
setscrews.
RotatingtheCrankshaftofEngineshouldnowoperatethe#33MainDriveBeltandcause
thetop#21PowerShafttorotateclockwise(asviewedfromrightsideofBody)andboth
#15Rand15LControlHandlespushedforward,youshouldnowhavebothleftandRight
Tracksgoingforward.Also,conversely,whenyoupullbackonboth#15Rand15LHandles,
theTracksshouldgorearward.
C.FollowingManufacturer'sinstructionbooklet,fillEnginewithpropergradeofoil
andGasTankwithpropergasoline.Checkthatyouhavegreasedthe"Zerk"fittingson
both#10Bearings,#22RearDriveWheels,and#25FrontIdlerWheels.ReplaceEngine's
SparkPlugandignitionwire.Mount#4RearCoverovertherearsetoffour5/16-18
"studs"stickingoutofthetopof#1ALand1ARBodyWalls.Ina similarmanner,mount
the#3Hood(square"cut-out"around#15Handles)overitssetoffourforward5/16-18
"studs".SecureRearCoverandforwardHoodwith5/16-18"wide-flange"WingNuts-
handtighten.Slip#35Handgripsoverendofeach#15ControlHandle.
Operation:
A.OperatorshouldnowmounttheTractorandassumea comfortablesittingposition.
Atthistime,heshouldfamiliarizehimselfwiththecontrols:#42ThrottleControl,
#43ChokeControl,#lK"AuxiliaryClutch"Handle,#1RClipand#15Rand15LClutch
Control.Handles.(Onelectricstartmodels,notethe#6DAmmeter,#6EIgnitionSwitch
(Stop,RunandStartpositions)and#6FLightSwitch.)
B.Beforestarting,moveTractorawayfrompeopleandimmediateobstructions.Move#1K
"AuxiliaryClutch"Handleforwardandbehind#1RCliptoreleasethe#27IdlerPulley's
pressureon#33MainDriveBelt.Pullupallthewayon#42ThrottleControl.Youmust
inaddition,pullupon#43ChokeControlforstartingwhencold.
C.Tostart7 hprecoilstartEngine:Turn#51IgnitionSwitchto"on"position,grasp
"pullhandle"firmlyinrighthandandpulluptostartEngine.On12hpinsert"key"
in#6EIgnitionSwitchandturnclockwisetostartEngine;whenEnginestarts,release
Key(similartostartinga car.)WithEnginerunning,settherespectiveThrottleand
ChokecontrolsforsmoothEngineoperationattheparticulartemperatureyouareworking
at.

Youmay"lock"bothThrottleandChokeControls(inthepositionyouhaveselected)by
rotatingtheHandles1/4turnclockwise.Theyare"unlocked"bya 1/4turncounter-
clockwise.NOTE:DONOT"over-tighten"or"over-loosen"theseControls- a 1/4turn
ineitherdirectionissufficient.
D.WithEnginerunning,keepyourrighthandonthe#15Land#15RControlHandlesand
holdtheminthecenterorneutralposition.Simultaneously,withlefthand,release
#1K"AuxiliaryClutch"Handlefromitspositioninfrontof(andretainedby)#1RClip
andinthedirectionoftheCrankshaft'srotation,whilesimultaneouslythelower#21
PowerShaftshouldrotateinthereversedirection.
WhilerotatingtheCrankshaftclockwise(asviewedfromrightsideofTractor)push
forwardontheLeft#15LControlHandleandnoticehowits"outside"#28IdlerWheelwill
engageandtightenthe#34Beltwrappedaroundthe#29DrivePulley(onoutsideofleft
#20Shaft)andaroundthe#31Pulley(onleft,nextto#30Pulley)onUpper#21Power
Shaft.Thisactionwillcausethe#29Pulleytorotateclockwiseandsubsequently
(throughthe#20SprocketandShaftandthe#38RollerChaindrivingthe#22RearDrive
Wheel)causetheLeftTracktogoforward.
Pullingrearwardonthe(above)#15LHandlewillreleasetheabove's#28Idlers'ten-
siononthefirst#34Beltandwillthenbegintoapplytensionwiththesecond#28Idler
Wheelontothesecond#34Beltwrappedaroundthesecond#29Pulley(oninsideofleft
#20Shaft)anditsmating#31Pulley(onleftnextto#30Pulley)onLower#21Power
Shaft.Thisrearwardposition-ofthe#15LHandlewillcauseTracktoreversedirection.
(Check#15RControlHandleforthesameresponseasabove.)
Now,withEnginestillrotating,allowittoslowlymoverearward(under#41Spring
tension)andsetthetransmission(upperandlower#21PowerShafts)inmotion.Now,
firmlyholdinga ControlHandle(#15Rand#15L)ineachhand,youcanmovetheTractor
forwardbypushingforwardonboth#15Handles;moverearwardbypullingbackonboth
#15Handles.Makea rightturnbypushingforwardonthe#15LControlHandlewhile
simultaneouslypullingrearwardontheRight#15RControlHandle.(Leftturnsareaccom-
plishedbyreversingaboveprocedure.)
TheParkingBrakeisoperatedbyrotating"clockwise"theWingNutmountedontop
frontcenterof#4ACover.Bytighteningthisnut,youwilldrawthe#47AShaftagainst
thebacksideofallfour#34ClutchBelts- thiswill"lock-up"the#29Pulleysandpro-
videa verypositiveparkingbrakeaction.Toreleasethebrake,justrotatetheWing
Nut"counterclockwise"(onlya fewturns)untilthe#47AShaftrisesapproximately1/8"
abovethe#34 Belts- atthissetting,takea centerpunchandup-setthethreaddirectly
abovetheWingNut;thiswillkeeptheWingNutfromevercomingoffthe3/8-16x 2-1/2
CarriageBolt.
NOTE:
FormaximumsafetybothControlHandlesmustbeheldbytheoperatoreitherbya
singlehandorwithbothhandswhilethetransmissionsystemisinmotion.Therefore,
withthetransmissioninmotion,theControlHandlesshouldneverbeleftunattendedor
thenaturalactionofthetransmissionwillcausethemtooccasionallybouncebackand
forth.Ifthisconditiontakesplace,itcanbequicklystoppedbydisengagingthe
transmissionsystemwiththeAuxiliaryClutchHandleandthenre-starting.Ifthiscon-
ditionpersists,repeatStep#24inAssemblyInstructionsandmovetherespective#28
Idlerassembliesforwardintheirrespectiveslotstorelievethisincorrectlyadjusted
pressureonthe#34Belts.(NOTE:Asyougainskillinthedrivingofyourtractor,
andasyour#34Beltsbecomeshinyandbrokenin,youmaywanttomovethe#28Idler
assembliesrearwardfora quickerrespondingTractor.)

Maintenance:
Thefollowingitemsshouldbecheckedeachtimeyoustartyourtractor.
1.GasandOilshouldbefullandclean- checkforanyleakages.
2.GreaseallZerkfittingsin#10Bearings,#22RearDriveWheels,and#25Front
IdlerWheels.(WhenusingTractorinunusuallydustyor"gritty"conditions,always
repeatgreasingeverythreehours.)
3.Check#33MainDriveBeltand#34ClutchBeltsforunduewearorfraying- a sign
ofpossiblemisalignedorimproperlyadjustedPulleysoralliedcomponents.
4.CheckthatWingNutson#4RearCoverand#3Hoodaretight.
5.CheckTrackTension:Tracksshouldbeallowedtobeaslooseasworkingconditions
permit.Tightenif"Track-jumping"isa problemorifoperatinginloosegravelorsnow.
6.CheckBatterywaterleveleverythreemonths.
7.Checkthat#42Throttleand#43Chokecontrolsareabletobeoperatedfreelywith-
outseverbinding.
8.Givea "onceover"tothecompleteTractorlookingforlooseormisadjustedparts.
Vibrationorrattlingisalwaysa signoftrouble;henceiftheseconditionsappear,
stoptheTractorimmediatelyandfindoutandcorrecttheproblembeforeanyfurther
operationofTractor.
BeltChanging:
Byremovingthefour1/4-20Locknutsholdingthetwo#26Bearingsagainstthe
"outside"of#1ARBodyWall(andlooseningthesetscrewsinthetworemaining#26
Bearings),youwillbeabletoslideboththeUpperandLower#21PowerShaftstothe
rightwhichwillallowroomatthelefttoslipallBeltsonandoff.
TRACK CHAIN
OF
DrawingforStep40
TRACK SHOES
TRACTOR
FRONT