Specifications

TM 9-2330-384-14&P
Section II. BRAKE SYSTEM MAINTENANCE
Paragraph
Number
Title
Page
Number
5-2
Drum Repair
.....................................................
5-5
5-3
Brake Shoe Repair ................................................
5-7
Table 5-1 Drum Diameters
................................................
5-6
5-2. DRUM REPAIR.
THIS TASK COVERS
a.
Drum Repair
INITIAL SETUP
Equipment Conditions:
Ref
Conditions
Materials/Parts:
l Abrasive cloth
(Item 5, Appendix E)
4-46 Drum removed.
General Safety Instructions:
Tools:
l Drum lathe
l Dial Indicator
l Micrometer
l DO NOT use a drum that exceeds maxi-
mum wear specifications.
a. DRUM REPAIR
(1) If drum has slight scores or grooves, polish with abrasive cloth.
WARNING
DO NOT use a drum that exceeds maximum wear specifications. Failure to
follow this warning may result in brake failure and serious injury or death to
personnel.
(2) Measure inside diameter of drum. If inside diameter of drum measures more than 16.62 in.
(42.21 cm), discard drum (see Table 5-1).
(3) Measure drum for taper. Maximum allowable taper is 0.010 in. (0.25 mm) measured from
outside edge of base of drum to brake shoe lining contact surface.
(4) Check for out-of-round condition. Measure drum at front and rear of machined surface at a
minimum of four locations (45 degrees apart) and record the readings. A maximum of
0.015 in. (0.38 mm) out-of-round is allowed.
(5) If drum exceeds taper or out-of-round allowances, machine drum. DO NOT machine drum to
more than 16.58 in. (42.11 cm) in diameter (see Table 5-1).
5-5