HydraulicSystem
Maintenance
CheckingtheHydraulicOil
Level
ServiceInterval:Beforeeachuseordaily
CheckexpansiontankandifnecessaryaddMOBIL1
15W-50syntheticmotoroiltotheFULLCOLDline
Figure36
1.Engine2.Expansiontank
ChangetheHydraulicSystem
Filter
ServiceInterval:Aftertherst200hours
Note:UseonlyMOBIL115W-50Syntheticmotoroil.
1.Stopengine,waitforallmovingpartstostop,and
allowenginetocool.Removekeyandengage
parkingbrake.
2.Locatethetwoltersunderthetransmissions.
Removelterguards.
3.Carefullycleanareaaroundlters.Itisimportant
thatnodirtorcontaminationenterhydraulicsystem.
4.Unscrewlterstoremoveandallowoiltodrain
fromdrivesystem.
Important:Beforereinstallingnewlters,
applyathincoatofoilonthesurfaceofthe
ltersrubberseal.
Turntheltersclockwiseuntilrubbersealcontacts
thelteradapterthentightenthelteranadditional
3/4to1fullturn.
5.Removetheventplugoneachtransmissionandll
throughexpansionreservoir,whenoilcomesoutof
ventreinstallplug.Torqueplugsto180in-lb(244
N-m).ContinuetoaddoiluntilitreachestheFULL
COLDlineontheexpansionreservoir.
Figure37
1.Oillter3.Leftreartire
2.Ventplug
6.Raisetherearofmachineupandsupportwithjack
stands(orequivalentsupport)justhighenoughto
allowdrivewheelstoturnfreely.
7.Startengineandmovethrottlecontrolaheadto1/2
throttleposition.Disengageparkingbrake.
A.Withthebypassvalveopenandtheengine
running,slowlymovethedirectionalcontrolin
bothforwardandreverse(5or6times).
B.Withthebypassvalveclosedandtheengine
running,slowlymovethedirectionalcontrol
inbothforwardandreversedirections(5to6
times).Checktheoillevel,andaddoilasrequired
afterstoppingtheengine.
C.Itmaybenecessarytorepeatstepsanduntilall
theairiscompletelypurgedfromthesystem.
Whenthetransaxleoperatesatnormalnoise
levelsandmovessmoothlyforwardandreverse
atnormalspeeds,thenthetransaxleisconsidered
purged.
DoNotchangehydraulicsystemoil(exceptforwhat
canbedrainedwhenchanginglter),unlessitisfeltthe
oilhasbeencontaminatedorbeenextremelyhot.
Changingoilunnecessarilycoulddamagehydraulic
systembyintroducingcontaminatesintothesystem.
36