The front disc brake system consists of the following components:
| • | A rotor mounted to a wheel hub/bearing assembly |
| • | A caliper assembly consisting of a caliper housing, caliper mounting bracket, brake pads, clips, slide pin bolts , and support bushings mounted to the steering knuckle |
| • | The rear disc brake system consists of the following components: |
| • | A rotor mounted to an axle shaft flange or a rear wheel hub |
| • | A caliper assembly consisting of a caliper housing, caliper mounting bracket, brake pads, clips, slide pin bolts , and support bushings mounted to a backing plate |
The caliper mounts in a way that allows the caliper to move laterally inboard as the brake pads wear. The caliper housing is a 1 piece casting with the inboard side containing the piston bore. A square cut rubber seal fits in a groove in the piston bore in order to provide a hydraulic seal between the piston and the caliper bore. The piston seal also acts as a return mechanism for the piston.
Applying the brake pedal causes the hydraulic pressure that moves the caliper piston. The piston then forces the inboard brake pad against the inboard braking surface of the rotor. Increasing the force against the rotor causes the caliper to move inboard. The outer brake pad then contacts the outboard braking surface of the rotor. The force of the 2 brake pads being squeezed against the rotor provides the desired braking forces to be generated.
Releasing the brake pedal relieves the pressure applied on the piston. The square cut seal on the piston relaxes and pulls the caliper piston back into the bore slightly. This allows a running clearance between the brake pads and the rotor braking surfaces.
