Parking Brake System: Service and Repair

PARKING BRAKE
STANDARD PROCEDURE - AUTOMATIC ADJUSTER LOCKING OUT
1) Place an assistant inside passenger compartment with pin (pin punch or drill bit) to be used in Step 5.
2) Place parking brake lever in "released" position.
3) Raise and support vehicle.





4) Grasp exposed section of parking brake cable at cable connector (front-to-right rear cable) (Fig. 70) and pull outward on front cable. Pull on cable until it stops and hold it in this position.








5) Have assistant inside passenger compartment insert pin punch (locking pin or drill bit) into hole in lever and foot pedal, past tang on adjuster mechanism, and through hole in backing plate of lever (Fig. 71) (Fig. 72). Hold pin in place. This pin will lock automatic adjuster spring out once technician under vehicle releases grasp on cables and will allow safe removal of cables and lever as necessary.

WARNING: DO NOT RELEASE THE AUTOMATIC ADJUSTER LOCKOUT DEVICE UNLESS THE PARKING BRAKE CABLES AND EQUALIZER ARE CONNECTED. KEEP HANDS OUT OF AUTOMATIC ADJUSTER SECTOR AND PAWL AREA. FAILURE TO OBSERVE CAUTION IN HANDLING THIS MECHANISM COULD LEAD TO SERIOUS INJURY.

6) Release grasp on cable underneath vehicle.
7) Lower vehicle and remove assistant from passenger compartment.

STANDARD PROCEDURE - AUTOMATIC ADJUSTER UNLOCKING
1) Assure that all cables are connected properly.

WARNING: DO NOT RELEASE THE AUTOMATIC ADJUSTER LOCKOUT DEVICE UNLESS THE PARKING BRAKE CABLES AND EQUALIZER ARE CONNECTED. KEEP HANDS OUT OF AUTOMATIC ADJUSTER SECTOR AND PAWL AREA. FAILURE TO OBSERVE CAUTION IN HANDLING THIS MECHANISM COULD LEAD TO SERIOUS INJURY.

2) Keeping hands clear of automatic adjuster sector and pawl area, firmly grasp pin punch (drill bit, or locking pin if a new lever has been installed) installed in lever mechanism (Fig. 71), then quickly remove it from parking brake lever mechanism. This action allows parking brake lever mechanism to automatically take up any slack.
3) Cycle parking brake lever once to position parking brake cables, then return lever its released position.
4) Raise vehicle far enough for rear wheels to clear floor.
5) Check rear wheels of vehicle. They should rotate freely without dragging with lever in released position.
6) Lower vehicle.