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TROUBLESHOOTING GUIDE
Brake Drums
For maintenance procedures, refer the following
sections:
PROBLEM
EXCESSIVE LOSS OF BRAKES OR
FADING
BRAKES PULL TO EITHER SIDE
ROUGH OR NOISY BRAKING ACTION
VIBRATION IN RIDE
5-6
• "Suspension Maintenance" on page 4-13
• "Alignment" on page 4-16
• "Brake System Maintenance" on page 4-19
• "Hub and Drum Maintenance" on page 4-25
• "Wheel Bearing Lubrication and Adjustment" on
PROBABLE CAUSE
Overheated brake drums
Drums of different diameters
Foreign matter in drums
Defective drums
Defective drums or out-of-round
Out-of-balance drums
page 4-27
Check for defective or misadjusted brake
linings, distorted or over-machined
drums. Also check for operating
conditions or loads that create severe
or excessive brake applications.
Replace with drums of same diameter.
Clean drums out.
Pull drums and inspect for any of the
following; Heat spotted drums, grease
spotting, blue drums, scored drums,
excessive wear at rivet holes or edges,
polished drums, out of round drums,
unbalanced drums, worn/damaged
brake components, foreign matter in
drums. Correct situation or replace
defective part(s).
Replace drums.
Balance drums.
SOLUTION
F-618-0911 Edition
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