PACCAR 579, 567 — Manually Release the Parking Brake

EMERGENCY - How to Recover a Vehicle the parking brakes (or Spring Brakes) can be manually released. WARNING 2 WARNING Do not disassemble a spring brake chamber. These chambers contain a powerful spring that is compressed. Sudden release of this spring may re- sult in death or personal injury. Do not drive vehicle with malfunction- ing brakes. If one of the brake circuits should become inoperative, braking distances will increase substantially and handling characteristics while braking will be affected. You could lose control of your vehicle or cause an ac- cident. Have it towed to the nearest dealer or qualified repair facility for re- pair.

Failure to comply may result in death, personal injury, equipment or property damage. WARNING Releasing the spring brakes on an un- secured vehicle could lead to an acci- dent. The vehicle could roll, which may result in death, personal injury, equip- ment or property damage. Always se- cure the vehicle with wheel chocks, chains, or other safe means to prevent rolling before manually releasing the spring brakes. 2. Remove the release stud assembly from the side pocket, and remove the release nut and washer from the release stud. WARNING Do not operate a vehicle when the spring brakes have been manually re- leased.

Driving a vehicle after its spring brakes are manually released is extremely dangerous. The brakes may not function. Failure to comply may re- sult in death, personal injury, equip- ment or property damage. To move a vehicle immobilized by the spring brakes due to loss of air pressure in the brake system, perform the following procedure: 1. Remove the cap from the spring chamber 3. Slide out the release stud. 50 Y53-6047-2HEN (03/18)