Bendix Commercial Vehicle Systems EB/ES BRAKES SERVICE MANUAL - Manual (Page 32)

31
Drum Inspection
Bendix does not recommend the turning or reboring of
brake drums. The reduction of wall thickness reduces the
amount of thermal energy that can be absorbed by the
drum during braking. Also, the decrease in wall thickness
increases the amount of defl ection for the same input load.
Both of these are undesirable. If drums are refaced or
oversized, the new diameter MUST NOT exceed the
maximum diameter marked on the drum during its service
life. • Clean all remaining brake parts thoroughly with a suitable shop
solvent. Wipe dry with a clean, lint-free cloth.
NOTE: This information is general in nature. For specifi c brake
drum inspection guidelines, refer to the drum manufacturer’s
instructions.
1. Check for cracks, heat-checks, glazing, grooving, run-out and
out-of-round. Refer to Figure 34. Cracked drums must be
replaced. Drums which are glazed, grooved, out-of-round, etc.,
may be returned to service if they can be repaired without
exceeding manufacturer’s maximum diameter or run-out
specifi cations.
2. Check drum diameter. Replace drum if it exceeds maximum
diameter stamped in drum.
CAUTION: Under no circumstances should drum be used if
it exceeds manufacturer’s recommended maximum
diameter or run-out specifi cation.
Figure 34. Drum Inspection
!
Drum Inspection
Inspection
Spider / Dustshield
and Cleaning