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Date of Origin – 02/24/11
Updated – 02/03/20
PARKING/EMERGENCY BRAKING SYSTEM
This portion of the air brake system makes provision for parking a vehicle on a grade and for emergency stopping in
the event of a failure of air supply in the service brake system.
Air pressure within the parking brake chamber is required to release the spring brake. An air reservoir is provided to
store enough air to release the brakes at least once by means of the tractor parking brake control, if there is an air line
failure. In addition to the normal release of spring brakes using air, a built-in manual release is provided. It allows easy
release of the spring brakes for relining the brakes or for moving the trailer in the absence of air pressure.
WARNING
DO NOT ATTEMPT TO MOVE THE TRAILER UNTIL PARKING BRAKE IS FULLY RE-
LEASED. FAILURE TO FOLLOW THIS SAFETY WARNING WILL RESULT
IN EQUIPMENT DAMAGE AND COULD RESULT IN SERIOUS INJURY
OR DEATH.
DANGER
MANUAL RELEASE OF THE PARKING BRAKE SHOULD ONLY BE USED TO MOVE
THE TRAILER TO A SAFE LOCATION WHERE REPAIRS CAN BE PERFORMED.
ALWAYS INSTALL WHEEL CHOCKS IN FRONT OF AND BEHIND TIRES BEFORE
MANUALLY RELEASING SPRING BRAKES. FAILURE TO FOLLOW THIS SAFETY
WARNING COULD RESULT IN DEATH OR SERIOUS INJURY.
WARNING
NEVER ATTEMPT TO USE THE TRAILER FOR THE MAJORITY OF THE BRAKING
EFFORT BY BACKING OFF THE TRACTOR BRAKES. THIS IS ILLEGAL, UNSAFE,
AND WILL CAUSE PREMATURE FAILURE OF THE TRAILER BRAKE SYSTEM.
FAILURE TO FOLLOW THIS SAFETY WARNING COULD RESULT IN
DEATH OR SERIOUS INJURY.
OPERATING INSTRUCTIONS
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