TM 9-2330-246-14
Table 3-1. Operator/Crew Troubleshootlng (Con't).
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
Check for brake fluid leaks.
Step 3.
I.f brake fluid is leaking, notify Organizational Maintenance.
7.
BRAKES DO NOT RELEASE.
Step 1.
Check to see if relay valve is in applied position.
If semitrailer is coupled, wait until air pressure on towing vehicle reaches normal operating
pressure. If semitrailer is uncoupled, open pressure tank draincock.
Step 2.
Check intervehicular air hoses for loose connections.
Step 3.
Check to see if pressure tank draincock is open.
Close pressure tank draincock.
Step 4.
Check to see if shut-off valves on towing vehicle are closed.
Open shut-off valves on towing vehicle.
Step 5.
Check intervehicular air hoses for restrictions.
Straighten or remove any kinks, bends, or restrictions from intervehicular air hoses.
BRAKES GRAB.
8.
Check air system for moisture.
Open draincock on pressure tank and drain moisture from system.
9. BRAKES ARE SLOW TO ENGAGE OR RELEASE.
Notify Organizational Maintenance.
10. NO BRAKES OR WEAK BRAKES.
Check intervehicular air hoses for proper connection.
Step 1.
Check that shut-off valves on towing vehicle are closed.
Step 2.
Open shut-off valves on towing vehicle.
Step 3.
Check to see that pressure tank draincock is open.
Close pressure tank draincock.
3-9