User manual

Maintenance
2.Carefullycleanareaaroundlter.Itisimportant
thatnodirtorcontaminationenterhydraulic
system.
3.Unscrewltertoremoveandallowoiltodrain
fromreservoir.
Important:Beforereinstallingnewlter,ll
itwithExmarkPremiumHydrooilandapply
athincoatofoilonthesurfaceoftherubber
seal.
Turnlterclockwiseuntilrubbersealcontactsthe
lteradapter,thentightenthelteranadditional
2/3to3/4turn.
4.FillreservoirasstatedinCheckHydraulicOil
Level.
ExmarkPremiumHydroOilisrecommended.
Refertothechartforanacceptablealternative:
HydroOil
ChangeInterval
ExmarkPremiumHydro
Oil(Preferred)
500Hours
Mobil115W50
250Hours
5.Loosenlter1/2turnandallowasmallamount
ofoiltoleakfromtheoillter(thisallowsairto
bepurgedfromtheoillterandsupplyhosefrom
thehydraulicreservoir).Turnlterclockwise
untilrubbersealcontactsthelteradapter.Then
tightenthelteranadditional2/3to3/4turn.
6.Raisetherearofmachineupandsupportwith
jackstands(orequivalentsupport)justhigh
enoughtoallowdrivewheelstoturnfreely.
CAUTION
Raisingthemowerdeckforserviceor
maintenancerelyingsolelyonmechanical
orhydraulicjackscouldbedangerous.The
mechanicalorhydraulicjacksmaynotbe
enoughsupportormaymalfunctionallowing
theunittofall,whichcouldcauseinjury.
DoNotrelysolelyonmechanicalorhydraulic
jacksforsupport.Useadequatejackstands
orequivalentsupport.
7.Ifeitherdrivewheeldoesnotrotate,oneorboth
ofthechargepumps(locatedonthetopofthe
mainpumpasshowninFigure21)mayhavelost
their“prime”.RefertoHydraulicSystemAir
Purgesection.
Note:DoNotchangehydraulicsystemoil(except
forwhatcanbedrainedwhenchanginglter),unless
itisfelttheoilhasbeencontaminatedorbeen
extremelyhot.
Changingoilunnecessarilycoulddamagehydraulic
systembyintroducingcontaminatesintothesystem.
HydraulicSystemAirPurge
ServiceInterval:Asrequired
Airmustbepurgedfromthehydraulicsystem
whenanyhydrauliccomponents,includingoil
lter,areremovedoranyofthehydrauliclinesare
disconnected.
Thecriticalareaforpurgingairfromthehydraulic
systemisbetweentheoilreservoirandeach
chargepumplocatedonthetopofeachvariable
displacementpump(Figure21).Airinotherpartsof
thehydraulicsystemwillbepurgedthroughnormal
operationoncethechargepumpis“primed”.
Figure21
1.Chargepumpcap2.Loosen11/2turnsonly
1.Stopengineandwaitforallmovingpartstostop.
Raisetherearofthemachineupontojackstands
highenoughtoraisethedrivewheelsoffthe
ground.
2.CheckoillevelasstatedinCheckHydraulicOil
Levelsection.
3.Startengineandmovethrottlecontrolaheadto
fullthrottleposition.MoveRHmotioncontrol
leverinward(together)andmovebothlevers
forwardwithequalpressure.
Ifeitherdrivewheeldoesnotrotate,itispossible
toassistthepurgingofthechargepumpby
carefullyrotatingthetireintheforwardposition.
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