TM 9-2330-231-14&P
BRAKEDRUM
This task covers:
INITIAL SETUP
Tools
Equipment Condition
ACTION
LOCATION
ITEM
REMARKS
WARNING
The hub and brakedrum assembly will be full of asbestos dust from the brake linings. Breathing
asbestos dust is extremely hazardous. A filter mask should be worn whenever working on the hub
and brakedrum assembly. Failure to do so could result in injury to personnel.
INSPECTION
1. Brakedrum (1)
Stud holes (2)
Check for cracks.
Discard drums with cracked stud
holes (2).
2.
Braking surface (3)
a. Check for cracks (4), heat checking
(5), and scoring (6).
b. Check for out-of-round or tapered
condition.
Maximum out-of-round is 0.010
inch (0.254 mm). Maximum taper
is 0.0004 inch (0.0102 mm).
REPAIR
3.
Brakedrum (1)
Reface braking surface to remove ail
cracks, heat checking, and scoring using
brake lathe.
Remove a maximum of 0.010 inch
(0.254 mm) per cut. Discard drums
with edge cracks or if inside
diameter exceeds 13.20 inches
(33.53 cm).
5-6