WirralCar Repairs
Brake Drums
- Backing Plate
- Wheel Cylinders
- Brake Shoes
- Return Spring
- Brake Shoe Holder
- Brake Shoe Adjuster
- Parking Brake Cable
Common Issues
- The back of the vehicle shakes or pulls to one side when applying the brakes.
- The brake pedal vibrates or feels soft on stopping power.
- The parking brake feels loose or doesn't hold the car in place.
- The brakes grind or squeal when applied.
What Is Brake Drum System?
A brake drum is a cylinder attached to a car’s wheel. When the brake pedal is pressed, the brake shoes inside the brake drum are pushed outwards to slow the vehicle down.
What Does Disc Brake System Consist Of?
Basic parts of the brake drum system
- Backing Plate
- Wheel Cylinders
- Brake Shoes
- Return Spring
- Brake Shoe Holder
- Brake Shoe Adjuster
- Parking Brake Cable
Operation of Brake Drum System.
The drum brake system is the brake mechanism used on the rear wheels of passenger cars and light commercial vehicles and heavy vehicles. The brake mechanism is fixed, the drum rotates with the Wheel. When the brake pedal is pressed, pressurized hydraulic brake fluid opens the pistons (right-left) in the wheel brake cylinder located on the brake plate, pushing the brake shoes towards the drum. The brake pads on the outer surface of the shoes create the braking effect by rubbing against the inner surface of the drum.
Drum brakes can overheat because they operate in a closed area and are difficult to cool, when it warms up, the braking force decreases. In addition, since the drum mass is high, it increases the unsprung mass (except the suspension), which has a negative effect in terms of comfort.
Advantages of Disc Brake System
- Drum brakes can provide more braking force than disc brakes of comparable diameter.
- Drum brakes have a large friction contact surface; therefore, they last longer.
- Drum brakes production costs are comparatively lower.
- Drum brakes generate less heat.
- Drums brakes have superior corrosion resistance than discs, and maintenance is required less frequently