Brake Drums Fresno CA
Drum Brake Self Adjusters: Understanding These Ancient Devices
The front disc brake and rear drum brake combination has been used on vehicles since the 1970s. Disc brakes use brake fluid to compensate for pad wear and are self-adjusting. The only hardware involved is to secure and locate the caliper to its bracket. In the case of the floating caliper, there are usually bushings, anti-rattle clips and bridge bolts. Opposing piston calipers are bolted to the knuckle and have pins to position the pads. Drum brakes have return springs to return the shoes to a rest position and hardware to hold the shoes to the backing plate. The shoes return to a fully retracted or rest position when the master cylinder releases pressure to the wheel cylinder. There is no compensation for lining wear. Adjusting the brakes would move the shoes closer the drum friction surface and reduce the travel of the wheel cylinder piston. It also required more fluid in the wh... |
