TM-9-2330-335-14-P
SEMITRAILER, TACTICAL, BREAKBULK/CONTAINER TRANSPORTER, 22-1/2 TON, RESET M871R, M871A1R AND M871A2R
TECHNICAL MANUAL; FIELD AND SUSTAINMENT MAINTENANCE MANUAL (INCLUDES REPAIR PARTS AND SPECIAL TOOLS LIST)
SEPTEMBER 2008
TM-9-2330-335-14-P - Page 602 of 640
TM 9-2330-335-14&P
0106-2
0106
BRAKE DRUM DATA SHEET
000106
When selecting a Webb replacement drum, the manufacturer’s name and part number is helpful. If this information is not
available, a replacement drum can be selected by comparing dimensions. A drawing is shown below, which indicates the
dimensions required to determine the existence of a replacement drum. If all of the dimensions shown are not available, you
must provide at least dimensions C, D, E, J, K, and O (Figure 2) to make a selection.
Figure 2.
Dimensions Required for a Replacement Drum.
0106
BRAKE DRUM SERVICE INFORMATION
000106
To achieve maximum life and optimum performance, proper brake maintenance and brake balance are essential. The
following procedures are suggested as a means of obtaining maximum service and to determine the need for replacement.
Inspection of Brake Drums
000106
1.
When relining brakes, the brake drum should be cleaned and inspected. To be suitable for further service, the
brake drum should pass the following checks:
a.
The brake surface should be free of scoring, excessive heat checks, and cracks.
b.
The brake surface diameter should be within the maximum diameter cast or stamped on the drum.
c.
The mounting holes and pilot must be round and true.
d.
The mounting surface must be clean and flat.
2.
If any of the above conditions are not met, the brake drum should be replaced.
447-0131
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