A rear drum brake kit typically includes all the necessary components to completely replace or refurbish the rear brake system. These components often include brake drums, shoes, springs, adjusters, and sometimes even wheel cylinders. The design of drum brakes differs significantly from disc brakes, providing unique advantages and requiring specific maintenance procedures.
Drum brakes incorporate a rotating drum that houses brake shoes. When the driver applies the brake pedal, hydraulic pressure forces these shoes against the inner surface of the drum, creating friction that slows down or stops the vehicle. This mechanism is particularly effective in providing consistent braking performance, especially under load. As such, drum brakes are commonly found in older vehicles and are still used in various models today, particularly in the rear braking systems of trucks and other heavy-duty vehicles.
The brake drum back plate, also known as the backing plate, is a robust, metal component that serves as a mounting surface for the braking system, specifically in drum brake assemblies. It is fixed to the rear axle and is strategically designed to house various components such as the brake shoe, adjuster, and wheel cylinder. Typically made from stamped steel or aluminum, the back plate must withstand significant forces and resist corrosion to maintain the integrity of the braking system.