Toro GrandStand 74504TE - Bleeding the Hydraulic System

4.Removethehydraulic-reservoircap.
5.Locatethedrainpluginthebottomofeach
transmissionandplaceadrainpanunderthe
plugs(Figure76).
g268090
Figure76
1.Drainplug
2.Hydrauliclter
6.Removethedrainplugs.
7.Allowthehydraulicuidtofullydrainfromthe
machine.
8.Removethehydraulicltercapandlterfrom
eachtransmission.
9.Installnewhydrauliclterswiththespringside
facingoutandinstalltheltercaps.
10.Installthedrainplugsandtorqueto22to27
N∙m(16to20ft-lb).
11.Loosentheventplugineachtransmissionso
thatitislooseandwobbles(Figure77).
Note:Thisallowsairtoescapethehydraulic
systemasyouaddhydraulicuid.
g031544
Figure77
Lefttransmissionshown
1.Ventplug
12.Slowlyadduidtothehydraulictankuntilit
startstocomeout1oftheventplugs.
Important:Usetheuidspeciedin
HydraulicSystemSpecications(page46)or
equivalent.Otheruidscouldcausesystem
damage.
Important:Monitorthelevelofuidinthe
hydraulictanksothatyoudonotoverllit.
13.Tightentheventplugs.
14.Installthehydraulic-tankcap.
15.Installthefueltank.
16.Starttheengineandletitrunforabout2minutes
topurgeairfromthesystem.
17.Shutofftheengineandcheckforleaks.
Note:If1orbothwheelsdonotdrive,referto
BleedingtheHydraulicSystem(page47).
BleedingtheHydraulic
System
Thetractionsystemisself-bleeding,however,itmay
benecessarytobleedthesystemifuidischanged
orafterworkisperformedonthesystem.
1.Parkthemachineonalevelsurface,disengage
thePTO,andengagetheparkingbrake.
2.Shutofftheengine,removethekey,andwait
forallmovingpartstostopbeforeleavingthe
operatingposition.
3.Raisetherearofthemachineontojackstands
highenoughtoraisethedrivewheelsoffthe
ground.
4.Starttheengineandmovethethrottlecontrolto
theidleposition.
Note:Ifthedrivewheeldoesnotrotate,assist
thepurgingofthesystembycarefullyrotating
thetireintheforwarddirection.
5.Checkthehydraulicuidlevelasitdrops,and
adduidasrequiredtomaintaintheproperlevel.
6.Repeatthisprocedurefortheoppositewheel.
47