Rear Axles
HUMMING NOISE WHILE DRIVING
CAUSE REMEDY
Improper or inadequate lubrication Consult lubrication chart for proper
lubricant, lubrication interval, and procedure
Bearing rollers worn Replace bearing. Always replace both cups
and cones
EXCESSIVE VIBRATION
CAUSE REMEDY
Twisted or broken axle shaft Replace axle shaft
Fractured axle shaft at flange Replace axle shaft. Examine axle housing for
bent condition. Make certain wheel bearings
are correctly adjusted. See page 6 - 12
T300-1_T500-1_T780
Troubleshooting
396 P/N 12261-683
REVISED: January 2015
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