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

  TM-9-2330-335-14-P - Page 92 of 640

TM 9-2330-335-14&P
0012-4
0012
BRAKES - CONTINUED
4.
NO BRAKES OR WEAK BRAKES.
WARNING
A hot brake can cause serious burns. Exercise extreme caution before attempting to touch brake
drum after use. Radiated heat will be felt before drum is touched. Failure to comply may result in
injury to personnel.
Step 1.
Feel brake drums for abnormal cold.
a.
If cold, check automatic slack adjusters for proper operation (WP 0034).
b.
If hot, go to step 2.
Step 2.
Check air hoses for proper connection to towing vehicle.
a.
If air hoses are not properly connected (Emergency to Emergency, Service to Service),
reconnect gladhands.
b.
If hoses are properly connected, go to step 3.
Step 3.
If towing vehicle is equipped with air line shut-off valves at the gladhands, check to make sure they are
fully open. (See operator’s manual for towing vehicle.)
a.
If air line valves are shut off, open them fully.
b.
If valves are open, go to step 4.
c.
If towing vehicle is not equipped with shut-off valves, go to step 4.
Step 4.
Check for open drain valves in semitrailer air reservoirs.
a.
If either drain valve is open, close it.
b.
If both drain valves are closed, go to step 5.
Step 5.
Check air pressure gage on towing vehicle for a minimum of 90 psi (621 kPa).
a.
If air pressure is low, build up pressure to normal level.
b.
If air pressure is low and will not build up, troubleshoot towing vehicle air system. (See
maintenance manual for towing vehicle.)
c.
If air pressure gage indicates normal, go to step 6.
Step 6.
Check air lines and connectors for restrictions and leaks.
a.
Remove any restrictions from hoses and tighten connections. Repair or replace as necessary
(WP 0037).
b.
If air lines and connections are not restricted or leaking, go to step 7.
Step 7.
Test operation of control valves (WP 0040).
a.
If control valve is defective, replace (WP 0040).
b.
If control valves are operating, go to step 8.
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
0.


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