Toro 74797 - Changing the Hydraulic System Oil and Filters

ChangingtheHydraulic
SystemOilandFilters
ServiceInterval:Aftertherst50hours
Every400hours
Important:Thebleedingprocessisrepeateduntilthe
oilremainsattheFullColdlineinthereservoirafter
purging.
F ailur e to pr oper l y perf or m this pr ocedur e
can r esult in ir r epara ble dama ge to the transaxle dri v e
system.
Note:Thelterandoilarechangedatthesametime.Do
Notreuseoil.Oncethenewlterisinstalledandoilisadded
anyairinthesystemmustbepurged.
RemovingHydraulicSystemFilters
1.Stopengine,waitforallmovingpartstostop,and
allowenginetocool.Removethekeyandengagethe
parkingbrake.
2.Raisetherearofmachineupandsupportwithjack
stands(orequivalentsupport)justhighenoughto
allowdrivewheelstoturnfreely.
Figure43
1.Jackingpoints
3.Locatethelterandlterguardsoneachtransaxle
drivesystem(Figure44).Removethreescrewssecuring
thelterguardandguard.
Figure44
Rightsideshown
1.Transaxledrive
4.Screws
2.Oillter
5.Ventplug
3.Filterguard
4.Carefullycleanareaaroundlters.Itisimportantthat
nodirtorcontaminationenterhydraulicsystem.
5.Placeacontainerbelowtheltertocatchtheoilthat
drainswhenthelterandventplugsareremoved.
6.Locateandremovetheventplugoneachtransmission
7.Unscrewtheltertoremoveandallowoiltodrain
fromdrivesystem.
Repeatthisprocedureforbothlters.
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