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 45 of 640
TM 9-2330-335-14&P
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FIELD AND SUSTAINMENT MAINTENANCE
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THEORY OF OPERATION
SEMITRAILER SERIES
0003
The semitrailer is made up of the following systems:
a.
Electrical System.
Connects to the towing vehicle electrical system to activate the 12 or 24V system. Includes 12
and 24V wiring for operating taillights, clearance lights, and LED lights.
b.
Brake System.
Air brake system for service and emergency operation. Includes air reservoirs, drain cocks,
gladhands, emergency relay valve, multi-function valve, spring brake chambers, lines, fittings, and hoses.
c.
Service Brake System.
Air pressure activates the air chambers, which push the slack adjusters. The slack adjusters
turn the camshafts, causing the brake shoes to expand against the brake drum.
d.
Suspension System.
Includes springs, U-bolts, axles, and trunnion tube for ease of travel on improved and
unimproved roads.
END OF WORK PACKAGE
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