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

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) -

CONTINUED.

While assistant applies brake pedal, check hose no. 468 from treadle valve (1)

Step 13.

to quick release valve (2) and two hoses from quick release valve (2) to brake

chambers (3) for damage or leaks by listening for hissing or using soap

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

If hoses are damaged or leaking, release brakes and repair or replace

hoses (page 4-609).

While assistant applies brake pedal, check quick release valve (2) for damage

Step 14.

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

a. If quick release valve is damaged or leaking, release brakes and

replace valve (page 4-812).

b. If pressure still drops, release brakes and notify direct support

maintenance.

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