Proper way to install brake shoes
Brake shoes are the most commonly serviced part of the drum brake system. This is due in large part to the harsh environment where brake shoes are installed. Brake shoes are available with size ranging from 11 lbs. Features of shoes include corrosion resistance, high strength & wear resistance. Brake shoes are used in drum style brake systems on each wheel & for medium duty & automotive drum brakes. Disc brake pads are settled at end of chain of brake pressure in brake system & assist .
Brake shoes are built to wear out, because of the tremendous energy they have to absorb. Brake shoes are found inside of drum brakes ; disc brakes have calipers , which serve the same function in a slightly different way.
Wheel cylinders are not exactly high-tech components, but they do play a vital role in drum brakes. When the driver steps on the brake pedal, hydraulic pressure from the master cylinder pushes the two pistons inside each wheel cylinder outward to force the brake shoes against the drums and apply the brakes. Wheel cylinders are used with drum brake systems. Brake fluid piped to wheel cylinders provides hydraulic pressure to the movable pistons within each cylinder.
Friction between the pads and the disc slows the disc down to stop the vehicle. Friction brakes, the most common kind, operate on the principle that friction can be used to convert the mechanical energy of a moving object into heat energy, which is absorbed by the brake. The essential components of a friction brake are a rotating part, such as a wheel, axle, disk, or brake drum, and a stationary part that is pressed against the rotating part to slow or stop it.
Drum brakes are a type of braking system with an iron casting shaped like a shallow drum that rotates with the wheel. Curved brake shoes are forced into contact with the inner edge of the drum to provide stopping or braking power. Drum brakes are not as efficient as disc brake systems but, drum brakes are easily produced and can be used on the rear of a vehicle since only about 30% of the braking is performed by the rear brakes. Rear brake shoes are more difficult to service when worn and may require special tools to service.
Disconnect the brake line (using the brake line wrench) being careful not to strip it. Tape the end of the brake line to minimize fluid leak and need for "bleeding" air out of the system later. Disc brakes (see the figure showing the disc brake setup) stop your car by applying lots of pressure to both sides of a spinning disc (rotor) on which the wheels are mounted. The brake pads are held and operated by the caliper, which squeezes the pads against the disc when you press your foot on the brake pedal.