Disc Brakes (Front)

DESCRIPTION









The front disc brakes consists of the following components:
- Braking disc (brake rotor)
- Caliper assembly - single piston, floating type
- Brake pads and linings
The front disc brakes used on this vehicle are double pin floating calipers.






The front disc brake double pin calipers are mounted directly to the steering knuckles and use no adapter. The caliper is mounted to the steering knuckle using bushings, sleeves and 2 guide pin bolts which thread directly into bosses on the steering knuckle.
The caliper is a one piece casting with the inboard side containing a single piston cylinder bore.
The front disc brake caliper piston, is manufactured from a phenolic compound. The outside diameter of the caliper piston is 54 mm.

OPERATION






Two machined abutments on the steering knuckle position the caliper. The guide pin bolts, sleeves and bushings control the side to side movement of the caliper. The piston seal is designed to pull the piston back into the bore of the caliper when the brake pedal is released. This maintains the proper brake shoe to rotor clearance.
All the front brake forces generated during braking of the vehicle are taken up directly by the steering knuckles of the vehicle.
A square cut rubber piston seal is located in a machined groove in the caliper cylinder bore. This provides a hydraulic seal between the piston and the cylinder wall.
A rubber dust boot is installed in the cylinder bore opening and in a groove in the piston. This prevents contamination in the bore area.
As front disc brake linings wear, master cylinder reservoir brake fluid level will drop. Fluid level should be checked after replacing linings.
Front disc brakes are equipped with an audible wear sensor on the outboard brake pad. This sensor emits a sound when the brake lining may need inspection or replacement.