SPRING BRAKE WILL NOT RELEASE (ONE OR MORE WHEELS)

TM 9-2320-270-20-1

TROUBLESHOOTING - CONTINUED

MALFUNCTION

TEST OR INSPECTION

CORRECTIVE ACTION

60. SPRING BRAKE WILL NOT RELEASE (ONE OR MORE WHEELS).

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

Step 1.

Shut down engine (TM 9-2320-270-10). Check spring brake relay valve (1)

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

watching for bubbles (page 4-1).

If relay valve is damaged or leaking, replace (page 4-796), or notify

direct support maintenance for repair.

Check hose (2) from relay valve to brake chamber for damage or leaks by lis-

Step 2.

tening for hissing or using soap solution and watching for bubbles (page 4-1).

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

TA239724

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