Disc Brake System: Description and Operation

OPERATION
All vehicles are equipped with front disc brake calipers (2B120). Front disc brake calipers use pin rail-type caliper assemblies with a cast iron rotor integral with the front hub assembly.

The front disc brake caliper (2B120) consists of a pin slider caliper housing, inner and outer shoe and lining assemblies, and a wheel cylinder piston (2196). The front disc brake caliper slides on two pins which also attach the front disc brake caliper to the front wheel spindle (3105).

The caliper housing contains a wheel cylinder piston. The wheel cylinder piston has a molded rubber dust boot on its outer end that is pressed into a cylinder bore groove to prevent cylinder contamination. There is also a rectangular section rubber piston seal located in the cylinder bore providing sealing between the cylinder and wheel cylinder piston. This seal also causes the wheel cylinder piston to retract once the brakes are released.

The outer shoe and lining assemblies are mounted in the front disk brake caliper anchor plate. The brake shoe and lining ends ride on stainless steel shoe slippers to provide a corrosion free mounting surface in the caliper anchor plate.

NOTE: Brake rotors are constructed with straight (radial) cooling fins, and may be used on either side of the vehicle.