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Page Title: SEVERE PRESSURE DROP WHEN BRAKE PEDAL IS APPLIED OVER 25 PSI (172 KPA). cont'd
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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
bubbles (page 4-1).
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.
3-166

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