TM 9-2330-386-14&P
ORGANIZATIONAL TROUBLESHOOTING TABLE - Continued
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
BRAKES
3. BRAKES WILL NOT RELEASE.
Check position of brake valve on towing vehicle. (See operator's
S t e p 1.
manual for towing vehicle).
a. Move brake valve to release position.
b. If brake valve is correctly positioned, go to step 2.
Check air hoses for proper connection to towing vehicle.
S t e p 2.
a. If air hoses are not properly connected (Emergency to Emergency,
Service to Service), reconnect gladhands.
b. If hoses are properly connected, go to step 3.
If towing vehicle is equipped with air line shut-off valves at the
S t e p 3.
g l a d h a n d s , check to make sure they are fully open. (See operator's
manual for towing vehicle).
a. If air line valves are shut off, open them fully.
b. If valves are open, go to step 4.
c. If towing vehicle is not equipped with shut-off valves, go to
step 4.
Check air pressure gage on towing vehicle for a minimum of 90 psi.
Step 4
a. If air pressure
is low, build up pressure to normal level.
b. If air pressure
is low and will not build up, troubleshoot
a i r s y s t e m . ( S e e maintenance manual for towing
towing vehicle
vehicle.)
c. If air pressure
gage indicates normal, go to step 5.
S t e p 5.
b. If emergency relay valves are operating, go to step 6.
Check for restriction in service air and emergency air lines.
S t e p 6.
a. If air lines or hoses are restricted, replace or repair as
b. If air lines and hoses are free of restrictions, go to step 7.
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