5-6
F-1044-0719
TROUBLESHOOTING GUIDE
Brake Drums
For maintenance procedures, refer the following
sections:
•
•
“Brake System Maintenance” on page 4-14
•
“Hub and Drum Maintenance” on page 4-20
•
“Wheel Bearing Lubrication and Adjustment” on
page 4-22
PROBLEM
PROBABLE CAUSE
SOLUTION
EXCESSIVE LOSS OF BRAKES OR
FADING
Overheated brake drums
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.
BRAKES PULL TO EITHER SIDE
Drums of different diameters
Replace with drums of same diameter.
Foreign matter in drums
Clean drums out.
ROUGH OR NOISY BRAKING ACTION
Defective drums
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).
VIBRATION IN RIDE
Defective drums or out-of-round
Replace drums.
Out-of-balance drums
Balance drums.