Toro Z Master 74048TE - Bleeding the Hydraulic System

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Figure67
1.Hydraulic-lterhousing2.Cover
8.RemovetheO-ringfromtheltercoverand
discardtheO-ring.
9.Afterthehydraulicuiddrainsfromthetransaxle,
removethelterfromthetransaxlehousing.
10.Repeatthisprocedureontheothersideofthe
machine.
InstallingtheHydraulicFluidand
Filters
1.Installanewlterinthetransaxleandanew
O-ringontotheltercover.
2.Installtheltercover.
3.Torquetheltercoverto22.6to33.8N∙m(200
to300in-lb).
4.Removethecapfromtheexpansiontankandll
thetransaxleswiththespecieduiduntilthe
properuidcapacitiesaremet.
Note:Fillingthetransaxlesmaytakemoretime
thanexpected.
5.Installthepreviouslyremovedventplugsand
torquetheplugsto395to904N∙cm(35to80
in-lb).
6.ProceedtoBleedingtheHydraulicSystem
(page55).
Important:FailuretoperformtheBleeding
theHydraulicSystemprocedureafter
changinghydraulicltersanduidcan
resultinirreparabledamagetothetransaxle
drivesystem.
BleedingtheHydraulic
System
1.Raisetherearofmachineandsupportitwith
jackstands(orequivalentsupport)justhigh
enoughtoallowthedrivewheelstoturnfreely.
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Figure68
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.
D.Shutofftheengineandchecktheuid
levelintheexpansionreservoir.Addthe
specieduiduntilitreachestheFULLCOLD
lineontheexpansionreservoir.
3.Repeatstep2untilalltheairiscompletely
purgedfromthesystem.
Note:Whenthetransaxleoperatesatnormal
noiselevels,movessmoothlyforward,and
reversesatnormalspeeds,itispurged.
4.Checktheuidlevelintheexpansionreservoir
analtime.Addthespecieduidasuntilit
reachestheFULLCOLDlineontheexpansion
reservoir.
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