Service Manual
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Figure284
1.Inputshaft/piniongear3.Differentialbearingshims
2.Bearingcaseshims
4.Differentialgearcase
Adjustmentstothegearcontactpositionaremadebymovingtheinput
shaft/piniongear(bearingcaseshims)orbymovingthedifferentialgearcase
(differentialbearingshims)(Figure284).
Note:Bearingcaseshimsareavailablein0.10mm(0.004inch)and0.20
mm(0.008inch)thickness.
Note:Differentialbearingshimsareavailablein0.10mm(0.004inch),0.20
mm(0.008inch),and0.40mm(0.016inch)thickness.
Studythedifferentcontactpatterns(Figure285andFigure286)andcorrect
gearengagementasnecessary.
Note:Whenmakingchanges,notethat2variablesareinvolved;refertothe
GearPatternMovementSummary(page8–71).
Example:Ifthepiniongeartoringgearbacklashissetcorrectlyto
specicationsandthebearingcaseshimischangedtoadjusttoothcontact,
itmaybenecessarytoadjustbacklashtothecorrectspecicationbefore
checkingthecontactpattern.
GearPatternMovementSummary
Everygearhasacharacteristicpattern.Theillustrationsshowtypicalpatterns
onlyandexplainhowpatternsshiftasthegearlocationischanged.
Groundsmaster
®
3280-D/3320
Page8–71
DriveAxles:ServiceandRepairs
05138SLRevB