Peterbilt 348 2017 - Clutch System Introduction; Manual Transmissions

TRANSMISSIONANDCLUTCH
ManualTransmissions
Manualtransmissionsaredesignedso
thattheinternalpartsoperateinabath
ofoilcirculatedbythemotionofgears
andshafts.
ServiceIntervals
Forrecommendedtypesandbrands
ofalllubricants,seethetransmission
manufacturer'sServiceManual
AMBIENTTEMPERATURERANGE
MODELRECOMMENDEDLUBRICANT(SeeNote)
DEG.CDEG.F
VISCOSITY
(SAE)
HDengineoil:APICEorCF-4.
Above-12Above+1050
Eaton-Fuller
Syntheticoil:ChevronRPM
SyntheticTransmissionFluid,orequal,meeting
MIL-L-2104DandEatonPS-081specications.
Above-40Above-4050
NOTE
Donotusemulti-viscosityorEP(extremepressure)gearoil(e.g.,axleoils)intransmissions.Multi-viscosityorEPoils
maydamagecomponents.
StandardTransmissionOilLevel
NOTE
Thevehiclemustbeparkedonlevel
ground.
Maintaintheoillevelandcheckit
regularly.Oilshouldbeuptobottom
ofllerplughole.
ClutchSystemIntroduction
Freepedalisthedistancetheclutch
pedalmovesbyapplyingonlyslight
pressure.Duringfreepedalthe
releaseyokeinthetransmission
movesuntilitsbearingpadscontact
thereleasebearing.Thismovementof
thereleaseyokeiscalledfreetravel.
Thus,freepedalandfreetravelare
directlyrelatedtoeachother.
Astheclutchpedalisdepressed
further,withharderpressure,the
releaseyokemovestherelease
bearingawayfromtheengine.This
causestheclutchplatetoreleasefrom
thedrivendisksintheclutch.Thisis
5-156Y53-6060-1C1(03/17)
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