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 TM 9-2330-394-13&P
BRAKE SYSTEM THEORY OF OPERATION - Continued
0005 00
PUSH-PULL/AIR SUPPLY VALVE
A push-pull/air supply valve is connected to the hose assembly for emergency brake operation. The
push-pull/air supply valve allows the trailer brakes to be manually set or released when trailer is not
connected to a towing vehicle. The push-pull/air supply valve knob is located on the right front side of
trailer. The knob is pulled to set the brakes. Pushing the knob will release the brakes as long as there is
at least 60 psi (414 kPa) in the air tank. If there is less than 60 psi (414 kPa) in the air tank, the brakes
cannot be released using the push-pull/air supply valve knob.
0005 00-3
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