Toro 74978 - Adjusting the Caster Pivot Bearing; Using the Clutch Shim

6.Thentightennutuntilthenextsetofslotslineup
withthecrossholeinshaft.Donotloosennutto
aligntheslot.Ifrequired,tightentothenextset
ofslots.
7.Installanewcotterpin.
Note:DoNotuseanti-seizeonwheelhub.
AdjustingtheCasterPivot
Bearing
ServiceInterval:Every500hours/Yearly(whichevercomes
rst)
1.Disengagethebladecontrolswitch(PTO),movethe
motioncontrolleverstotheneutrallockedposition
andsettheparkingbrake.
2.Stoptheengine,removethekey,andwaitforallmoving
partstostopbeforeleavingtheoperatingposition.
3.Removethedustcapfromcasterandtightenlocknut
(Figure63).
4.Tightenthelocknutuntilthespringwashersareatand
thenbackoffa1/4turntoproperlysetthepre-loadon
thebearings(Figure63).
Important:Makesurethespringwashersare
installedcorrectlyasshownin
Figure63.
5.Installthedustcap(Figure63).
Figure63
1.SpringWashers3.DustCap
2.LockNut
UsingtheClutchShim
Whentheclutchbrakehasworntothepointwheretheclutch
nolongerengagesconsistently,theshimcanberemovedto
extendtheclutchlife.
Figure64
1.Armature5.Brakespacer
2.Fieldshell6.Re-gapshim
3.Rotor7.Brakepole
4.Brakemountingbolt
RemovingtheClutchShim
1.Stoptheengine,waitforallmovingpartstostop,and
removethekey.Engagetheparkingbrake.Allow
themachinetocoolcompletelybeforestartingthese
instructions.
2.Usinganaircompressor,blowoutanydebrisfrom
underthebrakepoleandaroundthebrakespacers.
Figure65
3.Checktheconditionofthewireharnessleads,
connectors,andterminals.Cleanorrepairasnecessary.
4.Verifythat12Vispresentattheclutchconnectorwhen
thePTOswitchisengaged.
5.Measurethegapbetweentherotorandarmature.If
thegapisgreaterthan.04inch(1mm),proceedwith
thefollowingsteps:
A.Loosenbothbrakemountingboltsone-halfto
onefullturnasshownbelow .
Note:DoNotremovethebrakepolefromthe
eldshell/armature.Thebrakepolehasworn
tomatchthearmatureandneedstocontinueto
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