BRAKES WILL NOT RELEASE

Custom Search

Back
ONE OR MORE FLUORESCENT LAMPS FAIL TO LIGHT (M129A4 ONLY)

Up
TM-9-2330-380-14-P Semitrailer Van: Electronic Tactical 12-Ton 4-Wheel XM1063 (NSN 2330-01-224-9244) and M129A4 (NSN 2330-01-372-5642) Manual

NO BRAKES OR WEAK BRAKES

TM 9-2330-380-14&P

Table 4-2. Unit Troubleshooting (cont'd)

MALFUNCTION

TEST OR INSPECTION

CORRECTIVE ACTION

BRAKE SYSTEM

10. BRAKES WILL NOT RELEASE

Step 1. Check for restrictions in air lines and hoses.

If air lines or hoses are restricted, replace as required.

If air lines and hoses are not restricted, proceed to step 2.

Step 2. Check to see if shutoff valves in towing vehicle are open.

If valves are closed, open shutoff valves.

If valves are open, proceed to step 3.

Step 3. Check to see if any drain cock is open.

If any drain cock is open, close drain cock.

If all drain cocks are closed, proceed to step 4.

Step 4. Check for intervehicular air hoses (1) for proper connection and damaged or missing

preformed packing (2).

If hoses are improperly connected, connect them properly. If preformed packing is

missing or damaged, replace packing.

If hoses are properly connected and preformed packing is good, proceed to step 5