Toro 77281TA - Bleeding the Hydraulic System

8.Fillwiththespecieduiduntiluidappearsat
thebottomofeachtransaxletopport.
9.Installthetopportplugintoeachtransaxleas
theoillevelreachesthisport(Figure91).
10.Torquetheplugsto20N∙m(15ft-lb).
11.ProceedtoBleedingtheHydraulicSystem
(page68).
Important:FailuretoperformtheBleeding
theHydraulicSystemprocedureafter
changinghydraulicltersanduidcan
resultinirreparabledamagetothetransaxle
drivesystem.
g027477
Figure92
BleedingtheHydraulic
System
1.Raisetherearofmachineandsupportitwith
jackstands(orequivalentsupport)justhigh
enoughtoallowthedrivewheelstoturnfreely.
g017625
Figure93
1.Jackingpoints
2.Starttheengine,movethethrottlecontrolahead
tothe1/2throttleposition,anddisengagethe
parkingbrake.
A.Movethebypassleversintothepushingthe
machineposition.Withthebypassvalves
openandtheenginerunning,slowlymove
themotion-controlleversinbothforward
andreverse5or6times.
B.Movethebypassleversintotheoperating
themachineposition.
C.Withthebypassvalveclosedandthe
enginerunning,slowlymovethecontrol
leverinbothforwardandreversedirections
5to6times.
3.Repeatstep2untilalltheairiscompletely
purgedfromthesystem.
Note:Whenthetransaxleoperatesatnormal
noiselevels,movessmoothlyforward,and
reversesatnormalspeeds,itispurged.
4.Checktheuidlevel;refertoCheckingthe
Hydraulic-FluidLevel(page66).
68