Power Max Heavy Duty 828 OAE Snowthrower

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FormNo.3424-820RevA
POWERMAX®HDService
Manual
OriginalInstructions(EN)
RevisionHistory
RevisionHistoryPage2
POWERMAX®HDServiceManual
3424-820RevA
Preface
ThisservicemanualwaswrittenexpresslyforT oroservicetechnicians.TheT oroCompanyhasmade
everyefforttomaketheinformationinthismanualcompleteandcorrect.
Basicshopsafetyknowledgeandmechanical/electricalskillsareassumed.TheTableofContentslists
thesystemsandtherelatedtopicscoveredinthismanual.
Wearehopefulthatyouwillndthismanualavaluableadditiontoyourserviceshop.Ifyouhaveany
questionsorcommentsregardingthismanual,pleasecontactusatthefollowingaddress:
TheToroCompany
RLC/SWSCustomerCareDepartment
8111LyndaleAvenueSouth
Bloomington,MN55420
TheToroCompanyreservestherighttochangeproductspecicationsormakechangestothismanual
withoutnotice.
POWERMAX®HDServiceManual
Page3
Preface
3424-820RevA
ServiceProcedureIcons
ThefollowingiconsappearthroughoutthisServiceManualtobringattentionto
specicimportantdetailsofaserviceprocedure.
CriticalProcess
Thisiconisusedtohighlight:
Installingsafetyequipment(shields,guards,seatbelts,brakes,andR.O.P .S.
components)thatmayhavebeenremoved
Dimensionsorsettingsthatmustbemaintainedforpropermachineoperation
Aspecicfastenertighteningsequence
Componentorientationthatmaynotbeobvious
CriticalTorque
Thisiconisusedtohighlightanassemblytorquerequirementthatisdifferent
thanwhatisrecommendedintheStandardT orqueTables.
FluidSpecications
Thisiconisusedtohighlightuidspecicationsandcapacitiesthatareless
common,andmaynotappearonthemachineservicedecalorinthemachine
Operator’sManual.
Note:RefertotheservicedecalonthemachineandthemachineOperator’s
Manualforcommonlyuseduidspecicationsandcapacities.
Preface
Page4
POWERMAX®HDServiceManual
3424-820RevA
TableofContents
Preface................................................................................................................3
Chapter1:Safety............................................................................................1–1
SafetyInstructions.......................................................................................1–2
Chapter2:SpecicationsandMaintenance....................................................2–1
Specications...............................................................................................2–2
TorqueSpecications...................................................................................2–3
Chapter3:Troubleshooting.............................................................................3–1
GeneralTroubleshooting..............................................................................3–3
Chapter4:Engine...........................................................................................4–1
GeneralInformation.....................................................................................4–2
ServiceandRepairs.....................................................................................4–3
Chapter5:Controls.........................................................................................5–1
GeneralInformation.....................................................................................5–2
ServiceandRepairs.....................................................................................5–3
Chapter6:Belts...............................................................................................6–1
GeneralInformation.....................................................................................6–2
ServiceandRepairs.....................................................................................6–3
Chapter7:AugerHousing...............................................................................7–1
GeneralInformation.....................................................................................7–2
ServiceandRepairs.....................................................................................7–3
Chapter8:AugerGearbox..............................................................................8–1
GeneralInformation.....................................................................................8–2
ServiceandRepairs.....................................................................................8–3
Chapter9:WheelClutchTractionDriveSystem..............................................9–1
GeneralInformation.....................................................................................9–2
ServiceandRepairs.....................................................................................9–3
Chapter10:DischargeChute........................................................................10–1
GeneralInformation...................................................................................10–2
ServiceandRepairs...................................................................................10–3
AppendixA......................................................................................................A–1
ElectricalDrawingAbbreviations...................................................................A–2
ElectricalSchematicwithHandWarmers......................................................A–3
ElectricalSchematic.....................................................................................A–4
POWERMAX®HDServiceManual
Page5
Preface
3424-820RevA
Preface
Page6
POWERMAX®HDServiceManual
3424-820RevA
Chapter1
Safety
TableofContents
SafetyInstructions................................................................................................................................1–2
ThinkSafetyFirst...............................................................................................................................1–2
POWERMAX®HDServiceManual
Page1–1
Safety
3424-820RevA
SafetyInstructions
DANGER
Thissafetysymbolmeansdanger.Whenyouseethissymbol,
carefullyreadtheinstructionsthatfollow.Failuretoobeythe
instructionscouldcauseseriouspermanentinjury,disability,or
death.
WARNING
Thissafetysymbolmeanswarning.Whenyouseethissymbol,
carefullyreadtheinstructionsthatfollow.Failuretoobeythe
instructionscanresultinseriousinjury.
CAUTION
Thissafetysymbolmeanscaution.Whenyouseethissymbol,
carefullyreadtheinstructionsthatfollow.Failuretoobeythe
instructionscanresultinminortomoderateinjuryand/ordamage
topropertyorequipment.
ThinkSafetyFirst
Avoidunexpectedstartingofengine…
Alwaysturnofftheengine,removetheignitionkeyanddisconnectthesparkplug
wire(s)beforecleaning,adjusting,orrepair.
Avoidlacerationsandamputations…
Stayclearofallmovingpartswhenevertheengineisrunning.Treatallnormally
movingpartsasiftheyweremovingwhenevertheengineisrunningorhas
thepotentialtostart.
Avoidburns…
Donottouchtheengine,mufer,orothercomponents,whichmaybehotduring
operation,whiletheunitisrunningorshortlyafterithasbeenrunning.
Avoidresandexplosions…
Useextremecareinhandlingfuel.Itisammableanditsvaporsareexplosive.
Extinguishallcigarettes,cigars,pipes,andothersourcesofignition.Avoid
spillingfuelandneversmokewhileworkingwithanytypeoffuelorlubricant.
Wipeupanyspilledfueloroilimmediately.Neverremovethefuelcaporadd
fuelwhentheengineisrunning.Alwaysuseapproved,labeledcontainersfor
storingortransportingfuelandlubricants.Donotaddordrainfuelinanenclosed
space.Donotstorethemachineorfuelcontainerwherethereisanopename,
spark,orpilotlight,suchasonawaterheaterorotherappliance.
Avoidasphyxiation…
Donotoperateanengineinaconnedareawithoutproperventilation.
Avoidinjuryfrombatteries…
Safety:SafetyInstructions
Page1–2
POWERMAX®HDServiceManual
3424-820RevA
Batteryacidispoisonousandcancauseburns.Avoidcontactwithskin,eyes
andclothing.Batterygasescanexplode.Keepcigarettes,sparksandames
awayfromthebattery.
Avoidinjuryduetoinferiorparts…
Useonlyoriginalequipmentpartstoensurethatimportantsafetycriteriaaremet.
Avoidinjurytobystanders…
Alwayscleartheareaofbystandersbeforestartingortestingpowered
equipment.
Avoidinjuryduetoprojectiles…
Alwayscleartheareaofsticks,rocksoranyotherdebristhatcouldbepickedup
andthrownbythepoweredequipment.
Avoidmodications…
Neveralterormodifyanypartunlessitisafactoryapprovedprocedure.
Avoidunsafeoperation…
Alwaystestthesafetyinterlocksystemaftermakingadjustmentsorrepairson
themachine.RefertotheElectricalsectioninthismanualformoreinformation.
Avoidelectricalshock…
Nevertouchelectricalwiresorcomponentswhiletheengineisrunning.They
canbesourcesofshock.De-energizethesystemifyouarehavingtodorepairs.
Iftestingelectricalcomponentsensureyouareworkinginadryenvironment.
HydraulicSystem...
Releaseallpressureinthehydraulicsystembeforeperforminganyworkon
thesystem.Keepyourbodyandhandsawayfrompin-holeleaksornozzles
thatejecthydraulicuidunderhighpressure.Donotuseyourhandstosearch
forleaks.Hydraulicuidescapingunderpressurecanhavesufcientforceto
penetratetheskinandcauseseriousinjury.Seekmedicalattentionrightawayif
hydraulicuidgetsintheskin.
PersonalProtectiveEquipment…
Useappropriatepersonalprotectiveequipment(PPE)forprotectingyourself
frompotentialhazardsintheenvironmentinwhichyouwillwork.Eachprocess
outlinedinthismanualmayneeddifferentPPEtoprotecttheserviceperson.
UsetheproperPPEforthetaskathand.
Tools…
Alltoolsshouldbeinproperworkingorder.Donotusetoolsthatarebrokenorin
disrepair.Usethepropertoolfortheproperapplication.
Lifts,Hoists,andJacks…
Alllifts,hoists,andjacksshouldbeusedinaccordancewiththemanufacturer
information.Inspectlifts,hoists,andjackspriortouse.Donotoverloadlifts,
hoists,andjacks.Donotworkunderasuspendedload.Ensurechockblocks
areusedonequipmentthatcanmove.Useliftsorjacksandjackstandsthat
areratedtosupportthetotalweightofthemachineandanyattachments.Do
notrelyonjackstosupportthemachine.Ifyouareunsureoftheoperationof
anylifts,hoists,andjacksdonotuse.
FireExtinguishers…
Theproperclassofreextinguishershouldbeusedincaseofre.
ClassAextinguishersareforordinarycombustiblematerialssuchaspaper,
wood,cardboard,andmostplastics.Thenumericalratingonthesetypesof
POWERMAX®HDServiceManual
Page1–3
Safety:SafetyInstructions
3424-820RevA
extinguishersindicatestheamountofwateritholdsandtheamountofreitcan
extinguish.Geometricsymbol(greentriangle).
ClassBresinvolveammableorcombustibleliquidssuchasgasoline,
kerosene,greaseandoil.ThenumericalratingforclassBextinguishers
indicatestheapproximatenumberofsquarefeetofreitcanextinguish.
Geometricsymbol(redsquare).
ClassCresinvolveelectricalequipment,suchasappliances,wiring,circuit
breakersandoutlets.NeverusewatertoextinguishclassCres-theriskof
electricalshockisfartoogreat!ClassCextinguishersdonothaveanumerical
rating.TheCclassicationmeanstheextinguishingagentisnon-conductive.
Geometricsymbol(bluecircle).
ABC
Fireextinguishersareadrychemicaltypeusedformultiplepurposes.See
aboveinformationfordescription.
Ensurereextinguishersareserviceableandreplaceanythataredischargedor
outofinspectiondates.
Safety:SafetyInstructions
Page1–4
POWERMAX®HDServiceManual
3424-820RevA
Chapter2
SpecicationsandMaintenance
TableofContents
Specications.......................................................................................................................................2–2
TorqueSpecications...........................................................................................................................2–3
EquivalentsandConversions.............................................................................................................2–8
U.S.toMetricConversions................................................................................................................2–9
POWERMAX®HDServiceManual
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SpecicationsandMaintenance
3424-820RevA
Specications
PowerMaxHD
Model
38840/3885038841/38855
38842
38843/3886038844/38865
SteeringAutomaticSteeringPowerSteering
Throw
Distance
Upto45ft.(13.5m)
Upto52ft.(17.4
m)
Upto60ft.(18.3m)
Clearing
Width
28in.(71cm)32in.(81cm)28in.(71cm)32in.(81cm)
StarterRecoil/Electric
FuelCapacity0.92gal.(3.5L)1.2gal.(4.5L)
Engine
LC175FDSLC180FDSLC185FDSLC190FDS
Displacement265cc302cc375cc420cc
EngineRPM3300±100
OilCapacity32oz.(0.95L)37oz.(1.1L)
SparkPlugChampionRN9YC/NGKBPR6ES/NHPSF7RTC
SparkPlug
Gap
0.030in.(0.76mm)
Weight
264lbs.(120kg)283lbs.(128kg)300lbs.(136kg)305lbs.(138kg)310lbs.(141kg)
Length
62in.(157.5cm)
Width
29.5in.(75cm)33.5in.(85cm)29.5in.(75cm)33.5in.(85cm)
Height
44.5in.(113cm)
Speed
6Forward2Reverse
TirePressure
17–20psi(116–137kPa)
SpecicationsandMaintenance:Specications
Page2–2
POWERMAX®HDServiceManual
3424-820RevA
TorqueSpecications
Therecommendedfastenertorquevaluesarelistedinthefollowingtables.For
criticalapplications,asdeterminedbyT oro,eithertherecommendedtorqueora
torquethatisuniquetotheapplicationisclearlyidentiedandspeciedinthe
servicemanual.
Thesetorquespecicationsfortheinstallationandtighteningoffastenersshall
applyforallfastenerswhichdonothaveaspecicrequirementidentiedin
theservicemanual.Thefollowingfactorsshallbeconsideredwhenapplying
torque:cleanlinessofthefastener,useofathreadsealant(Loctite),degreeof
lubricationonthefastener,presenceofaprevailingtorquefeature,hardness
ofthesurfaceunderneathofthefastener’shead,orsimilarconditionwhich
affectstheinstallation.
Asnotedinthefollowingtables,torquevaluesshouldbereducedby25%for
lubricatedfastenerstoachievethesimilarstressasadryfastener.T orquevalues
mayalsohavetobereducedwhenthefasteneristhreadedintoaluminumor
brass.Thespecictorquevalueshouldbedeterminedbasedonthealuminum
orbrassmaterialstrength,fastenersize,lengthofthreadengagement,etc.
Thestandardmethodofverifyingtorqueshallbeperformedbymarkingalineon
thefastener(headornut)andmatingpart,thenbackofffastener1/4ofaturn.
Measurethetorquerequiredtotightenthefasteneruntilthelinesmatchup.
FastenerIdentication
InchSeriesBoltsandScrews
Figure1
1.Grade13.Grade8
2.Grade5
POWERMAX®HDServiceManual
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SpecicationsandMaintenance:TorqueSpecications
3424-820RevA
MetricBoltsandScrews
Figure2
1.Class8.82.Class10.9
SpecicationsandMaintenance:TorqueSpecications
Page2–4
POWERMAX®HDServiceManual
3424-820RevA
StandardTorqueforDry,ZincPlated,andSteelFasteners(InchSeries)
ThreadSizeGrade1,
5,&8
Fasteners
withThin
HeightNuts
SAEGrade1Bolts,Screws,
Studes&Semswith
RegularHeightNuts(SAE
Grade2orBetterNut)
SAEGrade5Bolts,Screws,
Studs&SemswithRegular
HeightNuts(SAEGrade
5orBetterNut)
SAEGrade8Bolts,Screws,
Studs&SemswithRegular
HeightNuts(SAEGrade
8orBetterNut)
In-lb.In-lb.N-cmIn-lb.N-cmIn-lb.N-cm
#6-32UNC
15±2169±2323±3260±34
#6-40UNF
10±213±2147±23
17±2192±2325±3282±34
#8-32UNC
29±3328±3441±5463±56
#8-36UNF
13±225±5282±30
31±4350±4543±5486±56
#10-24UNC
42±5475±5660±6678±68
#10-32UNF
18±230±5339±56
48±5542±5668±7768±79
1/4-20UNC
48±753±7599±79100±101130±113140±151582±169
1/4-28UNF
53±765±10734±113115±121299±136160±171808±192
5/16-18UNC
115±15105±151186±169200±252260±282300±303390±339
5/16-24UNF
138±17128±171446±192225±252542±282325±333672±373
ft-lb.ft-lb.
N-m
ft-lb.
N-m
ft-lb.
N-m
3/8-16UNC
16±216±222±330±341±443±558±7
3/8-24UNF
17±218±224±335±447±550±668±8
7/16-14UNC
27±327±337±450±568±770±795±9
7/16-20UNF
29±329±339±455±675±877±8104±11
1/2-13UNC
30±348±765±975±8102±11105±11142±15
1/2-20UNF
32±453±772±985±9115±12120±12163±16
5/8-11UNC
65±1088±12119±16150±15203±20210±21285±28
5/8-18UNF
75±1095±15129±20170±18230±24240±24325±33
3/4-10UNC
93±12140±20190±27265±27359±37375±38508±52
3/4-16UNF
115±15165±25224±34300±30407±41420±43569±58
7/8-9UNC
140±20225±25305±34430±45583±61600±60813±81
7/8-14UNF
155±25260±30353±41475±48644±65667±66904±89
Note:Reducetorquevalueslistedinthetableaboveby25%forlubricatedfasteners.Lubricated
fastenersaredenedasthreadscoatedwithalubricantsuchasoil,graphite,orthreadsealantsuch
asLoctite.
Torquevaluesmyhavetobereducedwheninstallingfastenersintothreadedaluminumorbrass.The
specictorquevalueshouldbedeterminedbasedonthefastenersize,thealuminumorbasematerial
strength,lengthofthreadengagement,etc.
ThenominaltorquevalueslistedaboveforGrade5and8fastenersarebasedon75%oftheminimum
proofloadspeciedinSAEJ429.Thetoleranceisapproximately±10%ofthenominaltorquevalue.
Thinnutsincludejamnuts.
POWERMAX®HDServiceManual
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SpecicationsandMaintenance:TorqueSpecications
3424-820RevA
StandardTorqueforDry,ZincPlated,andSteelFasteners(MetricSeries)
Class8.8Bolts,Screws,StudswithRegular
HeightNuts(Class8orStrongerNuts)
Class10.9Bolts,Screws,StudswithRegular
HeightNuts(Class10orstrongerNuts)
ThreadSize
in-lb.N-cmin-lb.N-cm
M5X0.857±6644±6878±8881±90
M6X1.096±101085±113133±141503±158
ft-lbs.
N-m
ft-lbs.
N-m
M8X1.2519±226±328±338±4
M10X1.538±452±554±673±8
M12X1.7566±790±1093±10126±14
M16X2.0166±17255±23229±23310±31
M20X2.5325±33440±45450±46610±62
Note:Reducetorquevalueslistedinthetableaboveby25%forlubricatedfasteners.Lubricated
fastenersaredenedasthreadscoatedwithalubricantsuchasoil,graphite,orthreadsealantsuch
asLoctite.
Torquevaluesmayhavetobereducedwheninstallingfastenersintothreadedaluminumorbrass.The
specictorquevalueshouldbedeterminedbasedonthefastenersize,thealuminumorbasematerial
strength,lengthofthreadengagement,etc.
Thenominaltorquevalueslistedabovearebasedon75%oftheminimumproofloadspeciedinSAE
J1199.Thetoleranceisapproximately±10%ofthenominaltorquevalue.Thinheightnutsincludejam
nuts.
SpecicationsandMaintenance:TorqueSpecications
Page2–6
POWERMAX®HDServiceManual
3424-820RevA
SAEGrade8SteelSetScrews
RecommendedTorque
ThreadSize
SquareHeadHexSocket
1/4-20UNC
140±20in-lb.73±12in-lb.
5/16-18UNC
215±35in-lb.145±20in-lb.
1/2-13UNC75±15ft-lb.50±10ft-lb.
3/8-16UNC35±10ft-lb.18±3ft-lb.
WheelBoltsandLugNuts
ThreadSizeRecommendedTorque**
7/16-20UNFGrade565±10ft-lb.
88±14N-m
1/2-20UNFGrade580±10ft-lb.
108±14N-m
M12X1.25Class8.880±10ft-lb.
108±14Nm
M12X1.5Class8.880±10ft-lb.
108±14Nm
**Forsteelwheelsandnon-lubricatedfasteners.
ThreadCuttingScrews(ZincPlatedSteel)
Type1,Type23,orTypeF
ThreadSizeBaselineTorque*
No.6-32UNC
20±5in-lb.
No.8-32UNC
30±5in-lb.
No.10-24UNC
38±7in-lb.
1/4-20UNC
85±15in-lb.
5/16-18UNC
110±20in-lb.
3/8-16UNC
200±100in-lb.
*Holesize,materialstrength,materialthicknessandnishmustbeconsideredwhendetermining
specictorquevalues.Alltorquevaluesarebasedonnon-lubricatedfasteners.
ConversionFactors
in-lb.X11.2985=N-cm
ft-lb.X1.3558=N-m
N-cmX0.08851=in-lb.
N-cmX0.73776=ft-lb.
ThreadCuttingScrews(ZincPlatedSteel)
ThreadsperInch
ThreadsSize
TypeATypeB
BaselineTorque*
No.6182020±5in-lb.
No.8151830±5in-lb.
No.10121638±7in-lb.
No.12111485±15in-lb.
*Holesize,materialstrength,materialthicknessandnishmustbeconsideredwhendetermining
specictorquevalues.Alltorquevaluesarebasedonnon-lubricatedfasteners.
POWERMAX®HDServiceManual
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SpecicationsandMaintenance:TorqueSpecications
3424-820RevA
EquivalentsandConversions
DecimalandMillimeterEquivalents
FractionsDecimals
mm
FractionsDecimals
mm
1/64
0.0156250.397
33/64
0.51562513.097
1/32
0.031250.794
16/32
0.5312513.484
3/64
0.0468751.191
35/64
0.54687513.891
1/16
0.06251.588
9/16
0.562514.288
5/64
0.0781251.984
37/64
0.57812514.684
3/32
0.93752.381
19/32
0.5937515.081
1/8
0.12503.175
5/8
0.625015.875
9/64
0.1406253.572
41/64
0.64062516.272
5/32
0.156253.969
21/32
0.6562516.669
11/64
0.1718754.366
43/64
0.67187517.066
3/16
0.18754.762
11/64
0.687517.462
13/64
0.2031255.159
45/64
0.70312517.859
7/32
0.218755.556
23/32
0.7187518.256
15/64
0.2343755.953
47/64
0.73437518.653
1/4
0.25006.350
3/4
0.750019.050
17/64
0.2656256.747
49/64
0.76562519.447
9/32
0.281257.144
25/32
0.7812519.844
19/64
0.2968757.541
51/64
0.79687520.241
5/16
0.31257.541
13/16
0.812520.638
21/64
0.3281258.334
53/64
0.82812521.034
11/32
0.343758.731
27/32
0.8437521.431
23/64
0.3593759.128
55/64
0.85937521.828
3/8
0.37509.525
7/8
0.875022.225
25/64
0.3906259.922
57/64
0.89062522.622
13/32
0.4062510.319
29/32
0.9062523.019
27/64
0.42187510.716
59/64
0.92187523.416
7/16
0.437511.112
15/16
0.937523.812
29/64
0.45312511.509
61/64
0.95312524.209
15/32
0.4687511.906
31/32
0.9687524.606
31/64
0.48437512.303
63/64
0.98437525.003
1/2
0.500012.70011.00025.400
1mm=0.03937in.0.001in.=0.0254mm
SpecicationsandMaintenance:TorqueSpecications
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POWERMAX®HDServiceManual
3424-820RevA
U.S.toMetricConversions
ToConvert
IntoMultiplyBy
MilesKilometers1.609
YardsMeters0.9144
FeetMeters0.3048
Feet
Centimeters
30.48
InchesMeters0.0254
Inches
Centimeters
2.54
LinearMeasurement
InchesMillimeters25.4
SquareMilesSquareKilometers
2.59
SquareFeetSquareMeters
0.0929
SquareInchesSquareCentimeters
6.452
Area
AcreHectare0.4047
CubicYardsCubicMeters
0.7646
CubicFeetCubicMeters
0.02832
Volume
CubicInchesCubicCentimeters
16.39
Tons(Short)
MetricTons0.9078
PoundsKilograms0.4536 Weight
OuncesGrams
28.3495
Pressure
Pounds/SquareInch
Kilopascal6.895
Foot-PoundsNewton-Meters1.356
Foot-PoundsKilogram-Meters0.1383
Work
Inch-Pounds
Kilogram-Centimeters
1.152144
Quarts
Liters0.9463
LiquidVolume
Gallons
Liters3.785
LiquidFlows
Gallons/MinuteLiters/Minute
3.785
1.Subtractby32°
TemperatureFahrenheit
Celsius
2.Multiplyby5/9
POWERMAX®HDServiceManual
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SpecicationsandMaintenance:TorqueSpecications
3424-820RevA
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