Case 590ST - Page 378

8-TROUBLESHOOTING
PROBLEMPOSSIBLECAUSECORRECTION
Fatiguebreakofpiniongeartooth.
Checkifthefracturelineiswavyor
clearlydelineated(stopline).
Intenseuse.
Continuousoverload.
Replacethebevelgear.
Breakofpinionteethandringgear
teeth.
Crashloadofdifferentialcomponents.Checkand/orreplaceotherdifferential
components.
Splinesofplanetarygearworn-out
(excessivebacklash).
Intenseuse.
Replacedifferentialgearassy..
Replacetheaxlebeam,ifnecessary
Insufcientlubrication.
Replaceallscratchedwashersand
thosewithathicknessby0.1mm
(0.004in)lowerthanthenewones.
Wornorscratchedwashersurfaces.
Incorrectlubrication.
Contaminatedlubricant.
Useproperlubricant,llupto
thecorrectlevelandchangeat
recommendedintervals.
Intenseuse.Replacebearing.
Excessivepinionaxialplay.
Checkpinionaxialbacklash.
Worn-outinnerdiameterofpinion
taperedrollerbearing.
Unsuitablelubrication.
Contaminatedlubricant.
Useproperlubricant,llupto
thecorrectlevelandchangeat
recommendedintervals.
Twistedorbrokenaxlebeam.Intensevehicleoperation,overload.Replacetheaxlebeam.
Loosewheelsupport.Replacetheaxlebeam.
Brokenaxlebeamatwheelange.
Bentaxlebeambody.
Checkthebendingoftheaxlebeam
body.Makesurethatthewheel
supportisnotwornoutorwrongly
adjusted.
Excessivebacklashbetweenring
gearandpinion.
Adjustthebacklashbetweenthering
gearandthepinion.
Worn-outpinionandringgear.Replacepinionandringgear.
Worn-outpinionbearings.Replacepinionbearings.
Loosepinionbearings.Adjustpinionbearings.
Excessivepinionaxialplay.
Adjusttheaxialplayofthepinion.
Worn-outdifferentialbearings.Replacedifferentialbearings.
Loosedifferentialbearings.
Adjustthebearings.
Ringgearexcessivelyoff-set.
Replacetheringgear.
Lowlubricantlevel.Restorethelevel.
Poororincorrectlubricantgrade.
Changelubricant.
Noiseduringtravel.
Bentaxlebeam.Replacetheaxlebeam.
8-16