Toro 74797 - Bleeding the Hydraulic System

InstallingtheHydraulicSystemFilters
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Figure45
1.Applyathincoatofthespeciedoilonthesurfaceof
therubbersealofeachlter.
2.Turnthelterclockwiseuntilrubbersealcontactsthe
lteradapterthentightenthelteranadditional3/4to
1fullturn.Repeatfortheotherlter
3.Installthelterguardsovereachlteraspreviously
removed.Usethethreescrewstosecurethelter
guards.
4.Verifytheventplugsareremovedbeforeaddingthe
oil(Figure44).
5.Slowlypourthespeciedoilthroughexpansion
reservoiruntiloilcomesoutofoneoftheventplug
holes.Stopandinstallthatventplug.Torquetheplug
to20.3N-m(180in-lb).
6.Continuetoaddoilthroughtheexpansionreservoir
untiloilcomesoutoftheremainingventplugholeon
thesecondtransmission.Stopandinstallthatvent
plug.Torquetheplugto20.3N-m(180in-lb).
7.Continuetoaddoilthroughtheexpansionreservoir
untilitreachestheFullColdlineontheexpansion
reservoir.
8.ProceedtotheBleedingtheHydraulicSystemsection.
Important:Failuretoperformthe
Bleeding
the Hy draulic System procedureafterchanging
hydraulicltersandoilcanresultinirreparable
damagetothetransaxledrivesystem.
BleedingtheHydraulicSystem
1.Entertheoperator'sposition.Startengineand
movethrottlecontrolaheadto1/2throttleposition.
Disengageparkingbrake.
A.Movethebypassleversintothepushingthe
machineposition;refertoPushingtheMachine
byHand(page21).Withthebypassvalvesopen
andtheenginerunning,slowlymovethemotion
controlpedalinbothforwardandreverse(5or
6times).
B.Movethebypassleversintotheoperating
themachineposition.Withthebypassvalve
closedandtheenginerunning,slowlymovethe
traction-controlpedalinbothforwardandreverse
directions(5to6times).
C.Stoptheengineandchecktheoillevelinthe
expansionreservoir.Addthespeciedoilasuntil
itreachestheFullColdlineontheexpansion
reservoir.
2.Repeatstep1untilalltheairiscompletelypurgedfrom
thesystem.
Whenthetransaxleoperatesatnormalnoiselevelsand
movessmoothlyforwardandreverseatnormalspeeds,
thenthetransaxleisconsideredpurged.
3.Checktheoillevelintheexpansionreservoironelast
time.AddthespeciedoilasuntilitreachestheFull
Coldlineontheexpansionreservoirifnecessary.
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