Disc Brakes
Delco floating caliper disc brake assembly uses a single piston caliper. The caliper is mounted to an anchor plate which is bolted to the steering knuckle. The caliper assembly floats through 4 rubber bushings on 2 steel guide pins.
The pins are threaded into caliper anchor plate. When brakes are applied, hydraulic pressure is passed to caliper piston. This force pushes inner brake pad against inner rotor braking surface.
Pressure then moves caliper inward on guide pins, thus forcing outer disc pad against outer rotor braking surface. When brakes are released, pressure is removed from cylinder. Rotor runout moves piston back off of rotor to maintain sufficient rotor-to-pad clearance.