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TM 9-2330-380-14&P
5-11. Brake Drum
This task covers:
a. Repair
b. Repair standards
Initial Setup:
Tools/Test Equipment:
EquipmentConditions:
General Mechanic's Tool Kit (item 1, Appendix B)
Brake drum removed from semitrailer (para. 4-52 or
Automotive Shop Set (item 2, Appendix B)
4-53)
Materials/Supplies:
a. Repair
1. If inspection (para. 4-52 (XM1063) or para. 4-53 (M129A4)) shows brake drum to be out-
of-round or excessively scored, rebore, removing as little metal as necessary to true friction
surface.
2. After boring, check that brake drum meets the requirements of repair standards (below).
3. If refinishing requires the removal of more than 1/16 inch of material (1/8 inch in diameter),
replace brake drum.
4. The repair and rebuild standards included herein give the minimum, maximum and key clearance
of new or rebuilt parts. They also give wear limits which indicate that the point to which a part
or parts may be worn before replacement, in order to give maximum service with minimum
replacement.
b. Repair standards
Size and fit of new parts
Item and point of measurement
Illustration
Wearlimits
Min.
Max.
letterref.
Brakedrum
Insidediameter
A
16.505
16.495
16.625
Concentricity of inside diameter
B
Indicator 0.004
TotalReading
*
withoutsidediameter
(* Indicates that part should be replaced when worn beyond the limits given in "size and fit of new
parts" column.).
1. Normally, all parts which have not been worn beyond the dimensions
shown under wear limits in the above table, or damaged by corrosion,
will be approved for service. Points of measurement for repair
standards are shown in the illustration.
Follow-on maintenance:
Install brake drum (para. 4-52 or 4-53)



 


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