Quantcast PARKING BRAKE DOES NOT RELEASE

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TM 9-2330-394-13&P
BRAKE SYSTEM TROUBLESHOOTING - Continued
0037 00
BRAKE SYSTEM - Continued
Table 1. Brake System Troubleshooting Procedures - Continued.
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
2. PARKING BRAKE DOES NOT
1.
Do all wheels fail to release
1.
Start towing vehicle engine.
RELEASE
2.
Release towing vehicle
parking brake.
3.
Check if trailer moves.
4.
Shut down towing vehicle
engine.
5.
If trailer moves, perform
Brake System Trouble-
shooting (WP 0037 00,
Trailer Brakes unevenly).
2.
Check to see if air is present
1.
Loosen air hose at push-
at push-pull/air supply valve
pull/air supply valve supply
supply port.
port.
2.
Check air hose for escaping
air.
3.
Tighten air hose at supply
port of push-pull/air supply
valve.
4.
If no air is present, replace
supply air hose from
emergency air brake coupler
to push-pull/air supply valve
supply port (WP 0060 00/WP
0037 00-12


 


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