Operator's Manual

Checkingthe
Hydraulic-FluidLevel
ServiceInterval:Beforeeachuseordaily
1.Allowthehydraulicuidtocooldown.Checkthe
oillevelwhentheuidiscold.
2.Checkexpansionreservoirandifnecessary
addToro
®
HYPR-OIL
™
500hydraulicuidtothe
FULLCOLDline(Figure81).
g334849
Figure81
1.Expansiontank2.Engine
ChangingtheHydraulic
FluidandFilters
ServiceInterval:Aftertherst100hours—Change
thehydraulic-systemltersand
uid.
Every400hoursoryearly,whichevercomes
rst—Aftertheinitialchange—changethe
hydraulic-systemltersanduidwhenusing
Toro
®
HYPR-OIL
™
500uid(changeitmore
oftenunderdirtyordustyconditions).
Toreplacethehydraulicuid,theltersneedtobe
removed.Replacebothatthesametime;referto
Hydraulic-FluidSpecications(page60)foruid
specications.
Purgeanyairinthesystemafteryouinstallthenew
ltersandadduid.RefertoBleedingtheHydraulic
System(page63).Repeatthebleedingprocessuntil
theuidremainsattheFULLCOLDlineinthereservoir
afterpurging.
Important:Failuretoproperlyperformthis
procedurecanresultinirreparabledamagetothe
transaxledrivesystem.
RemovingHydraulicFluidand
Filters
Thisprocedurevariesdependingonthedrivesystem
ofthemodel.Ifitisunclearwhichdrivesystemison
themodel,contactyourAuthorizedServiceDealer.
1.Parkthemachineonalevelsurface,disengage
theblade-controlswitch(PTO),andengagethe
parkingbrake.
2.Shutofftheengine,removethekey,andwait
forallmovingpartstostopbeforeleavingthe
operatingposition.
3.Allowtheenginetocool.
4.Locateandremovetheventplugasfollows:
Note:Ensurethatyoukeeptrackofthevent
plugafterremoval,asitcanbeeasytomisplace.
•ForZT4400Hydros,useanextensionand
7/16-inchsocket,accesstheventplugfrom
thetopofthemachinethroughtheholes
neartheroll-barmounts(Figure82).
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