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 91 of 640

0012-3
TM 9-2330-335-14&P
0012
BRAKES - CONTINUED
3.
BRAKES WILL NOT RELEASE - CONTINUED.
Step 5.
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 6.
Step 6.
Check for restriction in service air and emergency air lines.
a.
If air lines or hoses are restricted, replace or repair as required (WP 0037).
b.
If air lines and hoses are free of restrictions, go to step 7.
WARNING
•
To prevent injury, keep hands away from brake chamber push rods and slack adjusters. They will
move as service brakes are operated, and will automatically apply if system pressure drops.
Fingers/hands could be pinched or cut by moving parts. Failure to comply may result in injury to
personnel.
•
Disassembly of air brake chambers is NOT authorized. When inspecting or caging air brake
chambers, do not position yourself in front of, or in line with, the chamber. Failure to follow this
warning may result in injury or death to personnel.
•
Discarded air brake chambers must be safely and properly disposed of. They should be disarmed
prior to disposal. Failure to disarm assembly prior to disposal may, in time, result in spontaneous
release of the spring chamber and its contents, causing death, personal injury, and/or property
damage.
•
Before performing any work on the spring brake system, chock the wheels front and rear to prevent
semitrailer movement. Failure to follow this warning may result in injury or death to personnel.
Step 7.
Using soapy water, check spring brake chambers for leaks at clamp bands and hose fittings.
a.
If leaks are seen at brake chamber clamp band, replace spring brake chamber (WP 0038).
b.
If leaks are seen at hose fitting, tighten hose fitting or replace hose (WP 0037).
c.
If brake chambers are not leaking, go to step 8.
Step 8.
Remove brake drum (WP 0033) and check for broken brake shoe tension springs.
If brake shoe tension spring is broken, replace (WP 0032).
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
0.


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