SHOE 1P9807 - Caterpillar

Personal injury or death can result from a brake malfunction. Do not operate the machine if the parking brake was engaged due to a malfunction of the hydraulic oil system or the service brakes.Correct any problem before attempting to operate the machine.
Before you operate the machine, and after the parking brake has been serviced, be sure you adjust the parking brake mechanism.Failure to do so could damage the parking brake components or prevent the parking brake from functioning correctly.
Machine Preparation
Prepare the machine for testing by completing the procedure that is specified in the Service Manual module Testing and Adjusting, "Machine Preparation for Troubleshooting" for the machine that is being serviced.The parking brake and the actuator are located on the front frame of the machine.
When the parking brakes are released manually, the machine has no brakes.To avoid possible personal injury, the tires must be blocked securely before the parking brakes are manually released.
Manual Release Procedure
Illustration 1 g00869101
Parking Brake Actuator Assembly (1) Parking brake actuator. (2) Locknut. (3) Rod.
Loosen locknut (2) down rod (3) to a length of 19 mm (.75 inch). Turn rod (3) counterclockwise until the rod moves out enough to totally disengage the parking brake. Keep a record of the number of counterclockwise turns required in order to return the rod to the original position when the procedure is done.
Tighten locknut (2) to rod (3) .
When the manual release of the parking brake is no longer necessary, loosen locknut (2). Turn rod (3) clockwise to the original position.
The parking brake should be tested for proper operation after this procedure is done.Reference: For additional information on testing the parking brake, refer to the Service Manual module Testing And Adjusting, "Parking Brake - Test".