User Manual

CLUTCH
CLUTCH
Introduction
Freepedalisthedistancetheclutch
pedalmovesbyapplyingonlyslight
pressure.Duringfreepedalthe
releaseyokeinthetransmission
movesuntilitsbearingpadscontact
thereleasebearing.Thismovementof
thereleaseyokeiscalledfreetravel.
Thus,freepedalandfreetravelare
directlyrelatedtoeachother.
Astheclutchpedalisdepressed
further,withharderpressure,the
releaseyokemovestherelease
bearingawayfromtheengine.This
causestheclutchplatetoreleasefrom
thedrivendisksintheclutch.Thisis
calledreleasetravel.Andnally,on
9-,10-,and11-speedtransmissions,
asthepedalispushedtothelast1/2
to1inchoftravel,thereleasebearing
contactsandengagestheclutchbrake.
Thisiscalledclutchbrakesqueeze.
Whentheclutchwears,therelease
bearinggraduallymovestowardthe
engine,decreasingfreepedalandfree
travel.Whenallfreepedalandfree
travelaregone,theclutchrequires
adjustment.
Theclutchisadjustedbyturningan
adjustmentringthatisbuiltintothe
clutch.Whentheringisturned,the
releasebearingmovesbacktoward
thetransmission,restoringfreepedal
andclutchfreetravel.Undernormal
clutchwearthisistheonlyadjustment
needed.Donotattempttochangeany
othercomponent.
ClutchAdjustment-Normal
Wear
Clutchpedalfreetravelisusually13/4
in.to2in.(34to51mm).Thisshould
beyourguidefordeterminingwhether
yourtruckneedsclutchadjustment.
Also,ifitbecomesincreasinglydifcult
toshiftintogears,orthetruckcreeps
withtheclutchpedaldepressed,your
clutchneedsadjustment.Seethe
MaintenanceManualfortheproper
adjustmentprocedures.
Somevehicleshaveautomaticclutch
adjustment.Ifyoursdoesn'thavethis
feature,adjustmentwillhavetobe
donebyatrainedcertiedmechanic.
Havetheadjustmentdonebefore
clutchpedalfreetravelisreducedto
theminimumallowable1/2in.(13
mm).
(03/17)Y53-6077-1B15-155
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