Parking Brake System: Description and Operation

Drum In Hat Braking Disc:

WITH REAR DISC BRAKES
The parking brake mechanism on vehicles equipped with rear disc brakes, consists of a small duo-servo brake which is mounted to the disc brake caliper adapter. The hat (center) section of the rear rotor serves as the braking surface (drum) for the parking brakes.

WITH REAR DRUM BRAKES
On rear drum brake applications, the rear wheel service brakes also act as parking brakes. The rear drum brake shoes are mechanically operated by an internal lever and strut connected to a flexible steel cable. The wheel brake cables are joined at an equalizer which is attached to the front cable leading to the foot lever.