Toro 74830 - Hydraulic System Installation and Bleeding; Installing Hydraulic System Filters; Bleeding the Hydraulic System

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Figure48
1.Applyathincoatofoilonthesurfaceoftherubber
sealofeachlter.
2.Turnthelterclockwiseuntilrubbersealcontacts
thelteradapterthentightenthelteranadditional
3/4to1fullturn.Repeatfortheotherlter
3.Installthelterguardsovereachlteraspreviously
removed.Usethethreescrewstosecurethelter
guards.
4.Slowlypourthespeciedoilthroughexpansion
reservoiruntiloilcomesoutofventplugholes.Stop
andinstalltheventplugs.Torqueplugsto180in-lb
(20.3N-m).
5.ContinuetoaddoiluntilitreachestheFULLCOLD
lineontheexpansionreservoir.Proceedtothe
BleedingtheHydraulicSystemsection.
Important:Failuretoperformthe
Bleeding
the Hy draulic System procedureafterchanging
hydraulicltersandoilcanresultinirreparable
damagetothetransaxledrivesystem.
BleedingtheHydraulicSystem
1.Raisetherearofmachineupandsupportwithjack
stands(orequivalentsupport)justhighenoughto
allowdrivewheelstoturnfreely.
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Figure49
1.Jackingpoints
2.Startengineandmovethrottlecontrolaheadto1/2
throttleposition.Disengageparkingbrake.
A.Movethebypassleversintothepushingthe
machineposition;refertothePushingthe
MachinebyHandsectioninOperation.With
thebypassvalvesopenandtheenginerunning,
slowlymovethemotioncontrolleversinboth
forwardandreverse(5or6times).
B.Movethebypassleversintotheoperating
themachineposition.Withthebypassvalve
closedandtheenginerunning,slowlymovethe
directionalcontrolinbothforwardandreverse
directions(5to6times).
C.Stoptheengineandchecktheoillevelinthe
expansionreservoir.Addthespeciedoilas
untilitreachestheFULLCOLDlineonthe
expansionreservoir.
3.Repeatstep2untilalltheairiscompletelypurged
fromthesystem.
Whenthetransaxleoperatesatnormalnoiselevels
andmovessmoothlyforwardandreverseatnormal
speeds,thenthetransaxleisconsideredpurged.
4.Checktheoillevelintheexpansionreservoirone
lasttime.Addthespeciedoilasuntilitreaches
theFULLCOLDlineontheexpansionreservoir
ifnecessary.
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