Toro 30488 - Bleeding the Hydraulic System

Figure59
1.Filter
4.Removetheoldlter,allowtheoiltodrain,andwipe
thelter-adaptergasketsurfaceclean(Figure60).
5.Applyathincoatofhydraulicuidtotherubbergasket
onthereplacementlter.
6.Installthereplacementhydrauliclterontothelter
adapter.
Note:Donottightenthelterontotheadapter.
7.Fillthehydraulictankwithhydraulicuiduntiltheuid
overowsthelterandthenturntheoillterclockwise
untiltherubbergasketcontactsthelteradapter,then
tightenthelteranadditional1/2turn(Figure60).
Figure60
1.Hydrauliclter
3.Adapter
2.Gasket
8.Cleanupanyspilleduid.
9.Checktheuidinthereservoir,adduidtothetank
untilitreachesthecoldbafeofthetank.
Important:Usetheoilspecied,asotheruids
couldcausesystemdamage.
10.Starttheengineandletitrunforabout2minutesto
purgeairfromthesystem.Stoptheengineandcheck
forleaks.Ifoneorbothwheelswillnotdrive,referto
BleedingtheHydraulicSystem(page44).
11.Checkthelevelandadduid,ifrequired.Donot
overll.
BleedingtheHydraulicSystem
Thetractionsystemisselfbleeding,however,itmaybe
necessarytobleedthesystemiftheuidischangedorafter
workisperformedonthesystem.
1.DisengagethePTOandsettheparkingbrake.
2.Stoptheengineandwaitforallmovingpartstostop
beforeleavingtheoperatingposition.
3.Raisetherearofthemachineupontojackstandshigh
enoughtoraisethedrivewheelsofftheground.
4.Starttheengineandmovethethrottlecontroltothe
idleposition.
Note:Ifthedrivewheeldoesnotrotate,itispossible
toassistthepurgingofthesystembycarefullyrotating
thetireintheforwarddirection.
5.Checkthehydraulic-uidlevelasitdrops,andadduid
asrequiredtomaintaintheproperlevel.
6.Repeatthisprocedurefortheoppositewheel.
7.Thoroughlycleantheareaaroundeachofthe
charge-pumphousings.
CheckingtheHydraulicLines
ServiceInterval:Every100hours
Checkhydrauliclinesandhosesforleaks,loosettings,kinked
lines,loosemountingsupports,wear,weather,andchemical
deterioration.Makenecessaryrepairsbeforeoperating.
Note:Keepareasaroundhydraulicsystemcleanfromgrass
anddebrisbuildup.
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