Drum Brake System: Description and Operation

BRAKE PADS/SHOES

DESCRIPTION





Drum brakes consist of dual shoes usually Leading (1) and Trailing (4), with wheel cylinders (3), an automatic self adjusting mechanism (2), springs (5 & 7) and hold down clips (6) to hold the brake shoes against the dust shield (8).

OPERATION
When the brake pedal is depressed hydraulic pressure pushes the rear wheel cylinder pistons outward. The wheel cylinder push rods then push the brake shoes outward against the brake drum. When the brake pedal is released return springs attached to the brake shoes pull the shoes back to there original position.