Case 570T - Page 201

8-TROUBLESHOOTING
Problem
PossibleCauseCorrection
Wornorscratchedwasher
surfaces
Insufcientlubrication
Replaceallscratchedwashersandthose
withathicknessby0.1mm(0.004in)lower
thanthenewones
Incorrectlubrication.Contaminatedlubri-
cant
Useproperlubricant,lluptothecorrect
levelandchangeatrecommendedinter-
vals
Worn-outinnerdiameter
ofpiniontaperedroller
bearing
IntenseuseReplacebearing
Excessivepinionaxialplay
Checkpinionaxialbacklash
Unsuitablelubrication.Contaminatedlubri-
cant
Useproperlubricant,lluptothecorrect
levelandchangeatrecommendedinter-
vals
Twistedorbrokenaxle
beam
Intensevehicleoperation,overloadReplacetheaxlebeam
Brokenaxlebeamat
wheelange
LoosewheelsupportReplacetheaxlebeam
Bentaxlebeambody
Checkthebendingoftheaxlebeambody.
Makesurethatthewheelsupportisnot
wornoutorwronglyadjusted
NoiseduringtravelExcessivebacklashbetweenringgearand
pinion
Adjustthebacklashbetweentheringgear
andthepinion
Worn-outpinionandringgearReplacepinionandringgear
Worn-outpinionbearingsReplacepinionbearings
LoosepinionbearingsAdjustpinionbearings
Excessivepinionaxialplay
Adjusttheaxialplayofthepinion
Worn-outdifferentialbearingsReplacedifferentialbearings
Loosedifferentialbearings
Adjustthebearings
Ringgearexcessivelyoff-set
Replacetheringgear
LowlubricantlevelRestorethelevel
Poororincorrectlubricantgrade
Changelubricant
BentaxlebeamReplacetheaxlebeam
NoiseduringidlingNoisesemittedbytheaxlewhentheve-
hicleismovingareusuallyheardduring
idling,eventhoughtheyarenottooloud
Adjustthebacklashbetweentheringgear
andthepinionorreplacepinionandring
gear
Incorrectbacklashbetweenpinionandring
gear(thenoiseheardwhiledecelerating
disappearswhenspeedisincreased)
Adjustthebacklashbetweenthepinionand
theringgear
Worn-outpinionsplineorinputange
Replacethepinion
IntermittentnoiseDamagedringgearReplacethebevelgear
Loosedifferentialboxscrews
Tightenthescrewstotorque
Constantnoise
DamagedringgearteethorpinionteethReplacethebevelgear
Worn-outbearingsReplacethebearings
Worn-outpinionsplinesReplacethepinion
BentaxlebeamReplacetheaxlebeam
Noisewhilesteering
Worn-outdifferentialplanetarygears
Replacetheplanetarygears
Worn-outdifferentialboxand/orpinsReplacethedifferentialbox
Worn-outdifferentialwashers
Replacethewashers
Worn-outaxlebearnsplinesReplacetheaxlebearn
8-9