Exmark TURF TRACER S-SERIES - Hydraulic System Air Purge & Filter Replacement; Wheel Hub Torque Specification

Maintenance
Thecriticalareaforpurgingairfromthehydraulic
systemisbetweentheoilreservoirandeach
chargepumplocatedonthetopofeachvariable
displacementpump(
Figure14).Airinotherpartsof
thehydraulicsystemwillbepurgedthroughnormal
operationoncethechargepumpis“primed”.
Figure14
1.Chargepumpcap2.Loosen11/2turnsonly
1.Stopengineandwaitforallmovingpartstostop.
Raisetherearofthemachineupontojackstands
highenoughtoraisethedrivewheelsoffthe
ground.
2.CheckoillevelasstatedinCheckHydraulicOil
Levelsection.
3.Startengineandmovethrottlecontrolaheadto
fullthrottleposition.Movethespeedcontrol
levertothemiddlespeedpositionandplacethe
driveleversinthe“drive”position.
Ifeitherdrivewheeldoesnotrotate,itispossible
toassistthepurgingofthechargepumpby
carefullyrotatingthetireintheforwardposition.
Note:Itisnecessarytolightlytouchthecharge
pumpcapwithyourhandtocheckthepump
temperature.Ifthecapistoohottotouch,turn
offengine.Thepumpsmaybedamagedifthe
pumpbecomestoohot.
Ifeitherdrivewheelstilldoesnotrotatecontinue
withstep
4.
4.Thoroughlycleantheareaaroundeachofthe
chargepumphousings.
5.To“prime”chargepump,loosentwohexsocket
headcapscrews(showninFigure14)11/2turns
only.Makesureengineisnotrunning.Lift
thechargepumphousingupwardandwaitfor
asteadyowofoiltoowoutfromunderthe
housing.Retightenthecapscrews.Dothisfor
bothpumps.
Note:Hydraulicreservoircanbepressurizedup
to5psitospeedthisprocess.
6.Ifeitherdrivewheelstilldoesnotrotate,stop
andrepeatsteps4and5abovefortherespective
pump.Ifwheelsrotateslowly,thesystemmay
primeafteradditionalrunning.Checkoillevel
asstatedinChecktheHydraulicOilLevel
section.
7.Allowunittorunseveralminutesafterthecharge
pumpsare“primed”withdrivesysteminthefull
speedposition.CheckoillevelasstatedinCheck
theHydraulicOilLevelsection.
8.Checkhydrodrivelinkageadjustmentasstatedin
HydroDriveLinkageAdjustmentsectionin
Adjustments.
ReplaceEmissionsAirIntake
Filter
ServiceInterval:Every500hours
1.Stopengine,waitforallmovingpartstostop,and
removekeyorsparkplugwire(s).Engageparking
brake.
2.Removethelterfromtheventhose.
3.Insertanewlterintotheendoftheventhose.
WheelHub-SlottedNut
TorqueSpecication
ServiceInterval:Aftertherst100hours
Every500hoursthereafter
Torquetheslottednutto140-155ft-lb(190-210
N-m).
Note:DoNotuseanti-seizeonwheelhub.
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