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SPRING BRAKES DO NOT APPLY CONTINUED
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TM-9-2320-270-20-1 Truck Tractor Commercial Heavy Equipment Transporter (C-H ET) 85 000 GVWR 8 X 6 M911(NSN
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SERVICE BRAKES FAIL TO APPLY OR RELEASE, OR APPLY OR RELEASE SLOWLY cont'd - TM-9-2320-270-20-10204
TM9-2320-270-20-1
TROUBLESHOOTING - CONTINUED
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
62. SERVICE BRAKES FAIL TO APPLY OR RELEASE, OR APPLY OR RELEASE SLOWLY.
Step 1.
Start engine and build air pressure to operating level (TM 9-2320-270-10).
Shut down engine (TM 9-2320-270-10). Check treadle valve for damage or
leaks by listening for hissing or using soap solution and watching for
bubbles (page 4-1).
If treadle valve is leaking or damaged, replace (page 4-720).
Step 2.
Check air line no. 488 from treadle valve (1) to quick release valve (2)
on front axle for leaks or damage by listening for hissing or using soap
solution and watching for bubbles (page 4-1).
If line is damaged or leaking, repair or replace (page 4-609).
Step 3.
Check quick release valve (2) for damage or clogged ports (3).
If valve is damaged or has clogged ports, replace (page 4-812).
Step 4.
Check air lines from quick release valve (2) to both front brake cham-
bers (4) for damage or leaks by listening for hissing or using soap
solution and watching for bubbles (page 4-1).
if lines are damaged or leaking, repair or replace (page 4-609).
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