SERVICE BRAKES FAIL TO APPLY OR RELEASE, OR APPLY OR RELEASE SLOWLY

TM9-2320-270-20-1

TROUBLESHOOTING - CONTINUED

MALFUNCTION

TEST OR INSPECTION

CORRECTIVE ACTION

62. SERVICE BRAKES FAIL TO APPLY OR RELEASE, OR APPLY OR RELEASE SLOWLY.

Step 1.

Start engine and build air pressure to operating level (TM 9-2320-270-10).

Shut down engine (TM 9-2320-270-10). Check treadle valve for damage or

leaks by listening for hissing or using soap solution and watching for

If treadle valve is leaking or damaged, replace (page 4-720).

Step 2.

Check air line no. 488 from treadle valve (1) to quick release valve (2)

on front axle for leaks or damage by listening for hissing or using soap

solution and watching for bubbles (page 4-1).

If line is damaged or leaking, repair or replace (page 4-609).

Step 3.

Check quick release valve (2) for damage or clogged ports (3).

If valve is damaged or has clogged ports, replace (page 4-812).

Step 4.

Check air lines from quick release valve (2) to both front brake cham-

bers (4) for damage or leaks by listening for hissing or using soap

solution and watching for bubbles (page 4-1).

if lines are damaged or leaking, repair or replace (page 4-609).

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