Toro GrandStand 74505 - Using the Clutch Shim

UsingtheClutchShim
Somelatermodelyearunitshavebeenbuiltwithclutchesthat
containabrakeshim.Whentheclutchbrakehasworntothe
pointwheretheclutchnolongerengagesconsistently,you
canremovetheshimtoextendtheclutchlife.
Figure55
1.Armature5.Brakespacer
2.Fieldshell6.Regaptheshim.
3.Rotor7.Brakepole
4.Brake-mountingbolt
RemovingtheClutchShim
1.Shutofftheengine,waitforallmovingpartstostop,
andremovethekey.
2.Engagetheparkingbrakeandwaitformachinetocool
completely.
3.Usinganaircompressor,blowoutanydebrisunderthe
brakepoleandaroundthebrakespacers.
Figure56
4.Checktheconditionofthewire-harnessleads,
connectors,andterminals.Cleanorrepairthemas
necessary.
5.Verifythat12Vispresentattheclutchconnector
whentheyouengagetheblade-controlswitch(PTO).
6.Measurethegapbetweentherotorandarmature.If
thegapisgreaterthan1mm(0.04inch),proceedwith
thefollowingsteps:
A.Loosenbothbrakemountingbolts1/2to1full
turnasshowninFigure57.
Note:Donotremovethebrakepolefromthe
eldshell/armature.Thebrakepolehasworn
tomatchthearmatureandneedstocontinueto
matchafteryouremovetheshimtoensurethe
properbraketorque.
Figure57
1.Brake-mountingbolt
B.Usingneedle-nosepliers,orbyhand,removethe
shim.
Note:Donotdiscardtheshimuntilyouconrm
thattheclutchfunctionsproperly.
Figure58
1.Shim
C.Usingapneumaticline,blowoutanydebrisunder
thebrakepoleandaroundthebrakespacers.
D.Torqueeachbolt(M6x1)to12.3to13.7N∙m
(9.5to10.5ft-lb).
E.Usinga0.010inchthick-feelergauge,verifythat
agapispresentbetweentherotorandarmature
faceonbothsidesofthebrakepoleasshownin
Figure59andFigure60.
Note:Duetothewaytherotorandarmature
faceswear(peaksandvalleys),itissometimes
difculttomeasurethetruegap.
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