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Home >> GMC >> 1990 >> Forward Control 7.4 N, Automatic, 400/M40 >> Repair and Diagnosis >> Brakes >> Mechanical - Hydraulic >> DISC & DRUM (C, G, K, P, R & V Series) >> Description >> Disc Brakes >> Bendix Sliding Caliper

Bendix Sliding Caliper

NOTE: Bendix sliding caliper disc brakes are used on all models equipped with Bendix Hydro-Boost power units, 4-wheel disc brakes, and/or diesel engines. All other models use Delco floating caliper disc brakes.

Bendix sliding caliper disc brakes use a single piston caliper. Front calipers are attached to a mount integral with the steering knuckle. Rear calipers are mounted to an adapter bolted to the drive axle.

When brakes are applied, hydraulic pressure is passed to caliper piston. This force is transmitted to inner brake pad against inner rotor braking surface. Pressure then moves caliper inward, forcing outer disc pads against outer braking surface.

When brake pedal is released, pressure is removed from caliper cylinder and rotor runout moves piston back into caliper cylinder to maintain sufficient rotor-to-pad clearance.

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