Toro 74143 - Bleeding the Hydraulic System

3.Repeatfortheotherlter.
4.Installthelterguardsovereachlteraspreviously
removed.
5.Usethe3screwstosecurethelterguards.
6.Verifythattheventplugsareremovedbeforeadding
theoil.
7.Slowlypourthespeciedoilthroughtheexpansion
reservoiruntiloilcomesoutofoneofthevent-plug
holes.
8.Stopandinstallthatventplug.
9.Torquetheplugto20N-m(15ft-lb).
10.Continuetoaddoilthroughtheexpansionreservoir
untiloilcomesoutoftheremainingvent-plugholeon
thesecondtransmission.
11.Stopandinstallthatventplug.
12.Torquetheplugto20N-m(15ft-lb).
13.Continuetoaddoilthroughtheexpansionreservoir
untilitreachestheFULLCOLDlineontheexpansion
reservoir.
14.ProceedtoBleedingtheHydraulicSystem(page49).
Important:Failuretoperformthe
Bleeding
the Hy draulic System procedureafterchanging
hydraulicltersandoilcanresultinirreparable
damagetothetransaxledrivesystem.
B
A
C D
E
F
3/4
g027477
Figure70
BleedingtheHydraulicSystem
1.Raisetherearofmachineup,andsupportitwithjack
stands(orequivalentsupport)justhighenoughto
allowdrivewheelstoturnfreely.
g017625
1
Figure71
1.Jackingpoints
2.Entertheoperator'sposition,starttheengine,move
thethrottlecontrolaheadtothe1/2throttleposition,
anddisengageparkingbrake.
A.Movethebypassleversintothepushingthe
machineposition.Withthebypassvalves
openandtheenginerunning,slowlymovethe
motion-controlleversinbothforwardandreverse
(5or6times).
B.Movethebypassleversintotheoperating
themachineposition.Withthebypassvalve
closedandtheenginerunning,slowlymovethe
directionalcontrolinbothforwardandreverse
directions(5to6times).
C.Stoptheengineandchecktheoillevelinthe
expansionreservoir.Addthespeciedoilasuntil
itreachestheFULLCOLDlineontheexpansion
reservoir.
3.Repeatstep2untilalltheairiscompletelypurgedfrom
thesystem.
Note:Whenthetransaxleoperatesatnormalnoise
levels,movessmoothlyforward,andreversesatnormal
speeds,thenthetransaxleisconsideredpurged.
4.Checktheoillevelintheexpansionreservoironelast
time.AddthespeciedoilasuntilitreachestheFULL
COLDlineontheexpansionreservoirifnecessary.
49