Toro 74906 - Brake Maintenance; Adjusting the Parking Brake

BrakeMaintenance
AdjustingtheParkingBrake
ServiceInterval:Aftertherst100hours
Every500hoursthereafter
Checktomakesurethatthebrakeisadjustedproperly.This
proceduremustbefollowedaftertherst100hoursorwhen
abrakecomponenthasbeenremovedorreplaced.
1.Drivethemachineontoalevelsurface.
2.Disengagethebladecontrolswitch(PTO),movethe
motioncontrolleverstotheneutrallockedposition
andsettheparkingbrake.
3.Stoptheengine,waitforallmovingpartstostop,and
removethekey.
4.Raisethebackofthemachineupandsupportthe
machinewithjackstands.
DANGER
Mechanicalorhydraulicjacksmayfailto
supportmachineandcauseaseriousinjury.
•Usejackstandwhensupportingmachine.
•Donotusehydraulicjacks.
5.Removethereartiresfromthemachine.
6.Removeanydebrisfromthebrakearea.
7.Rotatethedrivewheelreleasehandletothereleased
position.RefertotheUsingtheDriveWheel
ReleaseValvessectioninOperation.
8.Measuretheoveralllengthofthecompressionspring.
Note:Thecorrectlengthshouldbebetween3.8and
4.0cm(1-1/2and1-9/16inches).Ifthespringlength
iswithinthisrange,noadjustmentisneeded.Ifitis
not,proceedtostep
9.
9.Holdthethreadedrodendwithatoolandadjustthe
locknutuntilthespringlengthisbetween3.8and4.0
cm(1-1/2and1-9/16inches);refertoFigure79.
Note:Donotallowthecabletoturnwhenthenuts
arebeingloosened.
Figure79
Left-handbrakeshown
1.Cableanchor5.Caliper
2.Holdthreadedrodhere
6.Compressionspring
3.Measure7.Threadedrod
4.Locknut8.Hub
10.Releasetheparkingbrake.
11.Turnthewheelhubbyhandinbothdirectionsrelative
tothecaliper;nodragofthecaliperpadonthewheel
hubisdesired.
12.Ifthereisnomovementbetweenthehubandthe
caliper,thenrepeattheadjustment(drivereleasevalves
mustbeinthereleasedpositiononthehydros).
13.Afteradjustingthebrakesonbothsidesofthemachine,
cyclethebrakehandleaminimumof6timestoallow
thecabletoseatintothesheathandmountingtabs.
14.Checkthespringlength;engagetheparkingbrakeand
repeatsteps8through12ifthelengthisnotinthe
correctrange.
15.Rotatethedrivewheelreleasehandletotheoperating
position.RefertotheUsingtheDriveWheel
ReleaseValvessectioninOperation.
16.Installthereartiresandtorquethelugnutsbetween
122and129N-m(90and95ft-lb).
17.Removethejackstands.
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