TROUBLESHOOTING

Symptom	Probable cause	Remedy
Vehicle pulls to one side	Scoring of drive shaft ball joint	Replace
	Wear, rattle or scoring wheel bearing	Replace
	Defective front suspension and steering	Adjust or replace
Vibration	Wear, damage or bending of drive shaft	Replace
	Drive shaft rattle and hub serration	Replace
	Wear, rattle or sintering of wheel bearing	Replace
Shimmy	Defective wheel balance	Adjust or replace
	Defective front suspension and steering	Adjust or replace
Excessive noise	Wear, damage or bending of drive shaft	Replace
	Rattle of drive shaft and hub serration	Replace
	Rattle of drive shaft and side gear serration	Replace
	Wear, rattle or scoring of wheel bearing	Replace
	Loose hub nut	Adjust or replace
	Defective front suspension and steering	Adjust or replace
Bent cage	Cage damage due to improper handling or tool usage	Replace bearing
Galling	Metal smears on roller end due to overheating, lubricant problem or overloading	Check seals, check for proper lubrication
Cracked inner race	Race cracked due to improper fit, cooking or poor bearing seats	Replace bearing
Etching	Bearing surfaces appear gray or grayish black in color with related etching away of material usually at roller spacing	Replace bearing
Brinelling	Surface indentations on race surface caused by rollers either under impact loading or vibration while the bearing is not rotating	Check seals, check for proper lubrication
Heat discoloration	Heat discoloration is dark blue resulting from overload or no lubricant (Yellow or brown color is normal)	Replace bearing Check seals and other parts
Fatigue spalling	Flaking of surface metal resulting from fatigue	Replace bearing Clean all related parts