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TM9-2320-270-20-1
TROUBLESHOOTING - CONTINUED
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
66. SERVICE BRAKES DO NOT WORK WHEN TRUCK IS BEING TOWED CONTINUED.
Check hose (1) from quick release valve (2) to right front service
Step 11.
gladhand (3) for damage or leaks by listening for hissing or using
soap solution and watching for bubbles (page 4-1).
If hose or gladhand are damaged or leaking, repair or replace
(page 4-609).
Check service hookup hose (4) and two gladhands (5) color coded blue
Step 12.
for damage, clogs, or leaks by listening for hissing or using soap
solution and watching for bubbles (page 4-1).
a. If hookup hose is damaged, clogged, or leaking, repair, re-
place, or clean (page 4-609).
b. If hookup hose is not damaged, clogged, or leaking, go to
SERVICE BRAKES FAIL TO APPLY OR RELEASE, OR APPLY OR RE-
LEASE SLOWLY (page 3-141), for vehicle being towed.
3-172
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