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

Step 3.

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

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

watching for bubbles (page 4-1).

If brake chambers are leaking or damaged, release brakes and replace

chambers (page 4-701).

While assistant applies brake pedal, check four hoses (4) from rear axle

Step 4.

relay valve (5) to rear axle 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 replace or repair

hoses (page 4-609).

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