Exmark Quest 4500-450 - Change the Hydraulic System Filter; Servicing the Spark Plug

Maintenance
ChangetheHydraulic
SystemFilter
ServiceInterval:Aftertherst250hours
Every500hoursthereafter
(Every250hoursifusing
Mobil115W50)
1.Stopengine,waitforallmovingpartstostop,and
allowenginetocool.Removekeyandengage
parkingbrake.
2.Locatethetwoltersunderthetransmissions.
Removelterguards.
3.Carefullycleanareaaroundlters.Itisimportant
thatnodirtorcontaminationenterhydraulic
system.
4.Unscrewlterstoremoveandallowoiltodrain
fromdrivesystem.
Important:Beforereinstallingnewlters,
applyathincoatofExmarkPremiumHydro
oilonthesurfaceoftheltersrubberseal.
Turntheltersclockwiseuntilrubberseal
contactsthelteradapterthentightenthelter
anadditional3/4to1fullturn.
5.Removetheventplugoneachtransmissionand
llthroughexpansionreservoir,whenoilcomes
outofventreinstallplug.
ExmarkPremiumHydroOilisrecommended.
Refertothechartforanacceptablealternative:
HydroOil
ChangeInterval
ExmarkPremiumHydro
Oil(Preferred)
500Hours
Mobil115W50
250Hours
Torqueplugsto180in-lb(244N-m).Continueto
addoiluntilitreachestheFULLCOLDlineon
theexpansionreservoir.
Figure24
1.Oillter3.Leftreartire
2.Ventplug
6.Raisetherearofmachineupandsupportwith
jackstands(orequivalentsupport)justhigh
enoughtoallowdrivewheelstoturnfreely.
7.Startengineandmovethrottlecontrolaheadto
1/2throttleposition.Disengageparkingbrake.
A.Withthebypassvalveopenandtheengine
running,slowlymovethedirectionalcontrol
inbothforwardandreverse(5or6times).
B.Withthebypassvalveclosedandtheengine
running,slowlymovethedirectionalcontrol
inbothforwardandreversedirections(5to
6times).Checktheoillevel,andaddoilas
requiredafterstoppingtheengine.
C.ItmaybenecessarytorepeatstepsAand
Buntilalltheairiscompletelypurgedfrom
thesystem.Whenthetransaxleoperatesat
normalnoiselevelsandmovessmoothly
forwardandreverseatnormalspeeds,then
thetransaxleisconsideredpurged.
DoNotchangehydraulicsystemoil(exceptforwhat
canbedrainedwhenchanginglter),unlessitisfelt
theoilhasbeencontaminatedorbeenextremelyhot.
Changingoilunnecessarilycoulddamagehydraulic
systembyintroducingcontaminatesintothesystem.
ServicingtheSparkPlug
ServiceInterval:Every200hours/Every2
years(whichevercomes
rst)
Every500hours—Replace
thesparkplug.
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