Drum brake systems are typically used to help stop the rear wheels of low performance vehicles and large trucks. Located on the rear axle, they use hydraulic pressure to generate friction and slow the vehicle down. The main components of a drum brake are the wheel cylinder, the brake shoes, the return springs, and the brake drum. The wheel cylinder sits at the top of the drum brake with two pistons inside. When the brakes are applied, the pressurized brake fluid pushes the pistons outward, which in turn force the brake shoes against the outer drum. The result is enough friction to stop a 2 ton vehicle.At Neuman Motors we recommend that you come in as soon as you notice any signs of malfunctioning brakes. Brake failure is not worth the risk of not bringing it in. Below are a list of common brake problems and their symptoms. If you’re experiencing any of them, bring your car by our repair center, Neuman Motors. One of our expert technicians will be standing by to help!
Common Drum Brake Problems
Drum brakes function by transforming the energy from the engine (in the form of hydraulic pressure) into friction, generating an enormous amount of heat in the process. Consequently, if the outer brake drum is cooled rapidly after heavy use, usually by being exposed to water, warping can occur. Warping can cause a shudder or pulse when the brakes are applied.
Another common problem with drum brakes occurs when the protective coating on the brake shoes wears off. When the brake fluid is released, the brake shoes are pushed outward against the brake drum and the wheels are slowed. Over time, however, the brake shoes become worn down and will need to be replaced.