Toro 74882 - Bleeding the Hydraulic System

G008748
3/4
1
2
3
4
5
6
Figure48
1.Applyathincoatofoilonthesurfaceoftherubber
sealofeachlter.
2.Turnthelterclockwiseuntilrubbersealcontactsthe
lteradapterthentightenthelteranadditional3/4
to1fullturn.
3.Repeatfortheotherlter
4.Installthelterguardsovereachlteraspreviously
removed.Usethethreescrewstosecurethelter
guards.
5.Verifytheventplugsareremovedbeforeaddingtheoil.
6.Slowlypourthespeciedoilthroughexpansion
reservoiruntiloilcomesoutofoneoftheventplug
holes.
7.Installtheventplug.Torquetheplugto20.3N-m
(180in-lb).
8.Continuetoaddoilthroughtheexpansionreservoir
untiloilcomesoutoftheremainingventplugholeon
thesecondtransmission.
9.Installtheventplug.Torquetheplugto20.3N-m
(180in-lb).
10.Continuetoaddoilthroughtheexpansionreservoir
untilitreachestheFULLCOLDlineontheexpansion
reservoir.ProceedtotheBleedingtheHydraulic
Systemsection.
Important:Failuretoperformthe
Bleeding
the Hy draulic System procedureafterchanging
hydraulicltersandoilmayresultinirreparable
damagetothetransaxledrivesystem.
BleedingtheHydraulicSystem
1.Raisetherearofmachineupandsupportwithjack
stands(orequivalentsupport)justhighenoughto
allowdrivewheelstoturnfreely.
G010333
1
Figure49
1.Jackingpoints
2.Gototheoperator'sposition.Starttheengineand
movethrottlecontrolaheadto1/2throttleposition.
Disengageparkingbrake.
A.Movethebypassleversintothepushingthe
machineposition;refertothePushingthe
MachinebyHandsectioninOperation.Withthe
bypassvalvesopenandtheenginerunning,slowly
movethemotioncontrolleversinbothforward
andreverse(5or6times).
B.Movethebypassleversintotheoperating
themachineposition.Withthebypassvalve
closedandtheenginerunning,slowlymovethe
directionalcontrolinbothforwardandreverse
directions(5to6times).
C.Stoptheengineandchecktheoillevelinthe
expansionreservoir.Addthespeciedoilasuntil
itreachestheFULLCOLDlineontheexpansion
reservoir.
3.Repeatstep2untilalltheairiscompletelypurgedfrom
thesystem.
Note:Whenthetransaxleoperatesatnormalnoise
levelsandmovessmoothlyforwardandreverseat
normalspeeds,thenthetransaxleisconsideredpurged.
4.Checktheoillevelintheexpansionreservoironelast
time.AddthespeciedoilasuntilitreachestheFULL
COLDlineontheexpansionreservoirifnecessary.
37