Toro 74891 - Bleeding the Hydraulic System

6.Installthesecondventplugandtorqueitto20N•m
(180in-lb).
7.Continuetoadduidthroughtheexpansionreservoir
untilitreachestheFullColdlineontheexpansion
reservoir.
Important:Failuretoperformthe Bleeding
the Hy draulic System procedureafterchanging
hydraulicltersandoilcanresultinirreparable
damagetothetransaxledrivesystem.
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A
C D
E
F
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Figure52
BleedingtheHydraulicSystem
1.Raisetherearofmachineupandsupportitwithjack
stands(orequivalentsupport)justhighenoughto
allowthedrivewheelstoturnfreely.
G010333
1
Figure53
1.Jackingpoints
2.Entertheoperator'sposition,starttheengine,move
thethrottlecontrolto1/2throttleposition,and
disengagetheparkingbrake.
A.Movethebypassleversintothepushingthe
machineposition;refertoPushingtheMachine
byHand(page24).Withthebypassvalves
openandtheenginerunning,slowlymovethe
motion-controlleversinbothforwardandreverse
directions(5or6times).
B.Movethebypassleversintotheoperating
themachineposition.Withthebypassvalve
closedandtheenginerunning,slowlymovethe
directionalcontrolinbothforwardandreverse
directions(5to6times).
C.Shutofftheengineandchecktheuidlevelinthe
expansionreservoir.Addthespecieduidas
untilitreachestheFullColdlineontheexpansion
reservoir.
3.Repeatstep2untilalloftheairiscompletelypurged
fromthesystem.
Note:Whenthetransaxleoperatesatnormalnoise
levelsandmovessmoothlyforwardandreverseat
normalspeeds,thenthetransaxleisconsideredpurged.
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