SEVERE PRESSURE DROP WHEN BRAKE PEDAL IS APPLIED OVER 25 PSI (172 KPA)

TM9-2320-270-20-1

TROUBLESHOOTING - CONTINUED

MALFUNCTION

TEST OR INSPECTION

CORRECTIVE ACTION

67. SEVERE PRESSURE DROP WHEN BRAKE PEDAL IS APPLIED OVER 25 PSI (172 KPA).

Step 1.

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

down engine (TM 9-2320-270-10). While assistant applies brake pedal, check

two front brake chambers (1) for leaks or damage by listening for hissing or using

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

If front brake chambers are damaged or leaking, replace

(page 4-686).

Step 2.

While assistant applies brake pedal, check four pusher axle brake chambers

(2) for leaks or damage by listening for hissing or using soap solution and

watching for bubbles (page 4-1).

If pusher axle brake chambers are damaged or leaking, release brakes

and replace chambers (page 4-692).

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