replace rear drum brakes

Replacing Rear Drum Brakes A Comprehensive Guide

When it comes to vehicle maintenance, brakes are not something to overlook. Rear drum brakes are a common braking system found in many vehicles, especially older models. While they can be effective in providing stopping power, their components can wear out over time. This article will walk you through the process of replacing rear drum brakes, ensuring your vehicle remains safe and efficient.

Understanding Rear Drum Brakes

Before diving into the replacement process, it is essential to understand what rear drum brakes consist of. In a typical drum brake system, a cylindrical drum houses the brake shoes, which press against the inside of the drum to create friction and stop the vehicle. Key components include

- Brake Drum The external shell that rotates with the wheel. - Brake Shoes Curved pieces that press against the drum to slow or stop the vehicle. - Wheel Cylinder A hydraulic component that pushes the brake shoes against the drum. - Spring Assembly Springs that hold the shoes in their resting position and retract them after braking.

Signs Your Drum Brakes Need Replacement

Knowing when to replace your drum brakes can save you from larger issues down the line. Common signs include

- Squeaking or Squealing Noises This can indicate that the brake shoes are worn out. - Vibration or Pulsation If you feel vibrations when braking, it may be time to check your drum brakes. - Reduced Braking Efficiency If it takes longer to stop your vehicle, there could be an issue with the brake shoes or drums.

Tools and Materials Needed

Before you begin, ensure you have the necessary tools and materials

- Car jack and jack stands - Lug wrench - Brake drum removal tool (if required) - Socket set - Brake cleaner - New brake shoes and drums - Spring tool (optional, but helpful) - Gloves and safety goggles

1. Prepare Your Vehicle Park your vehicle on a flat surface and engage the parking brake. Loosen the lug nuts on the rear wheels slightly but do not remove them yet.

2. Lift the Vehicle Use the car jack to lift the rear of the vehicle and secure it with jack stands. Once lifted, completely remove the lug nuts and take off the rear wheels.

3. Remove the Brake Drum Inspect the brake drum for any retaining screws. If present, remove them. Gently tap the drum with a hammer if it is stuck, or use a brake drum removal tool to help slide it off the hub.

4. Inspect the Brake Components Check the brake shoes, springs, and wheel cylinder for wear and damage. Take note of how the assembly is put together to aid in reinstallation.

5. Remove Old Brake Shoes Carefully disconnect the springs using your spring tool (or pliers) and remove the old brake shoes. Be cautious, as the springs can snap back.

6. Install New Brake Shoes Position the new brake shoes in place, following the configuration of the old shoes. Reattach the springs securely to hold the shoes in position.

7. Prepare and Install the New Brake Drum Clean the new brake drum with brake cleaner to remove any oil or debris. Slide it back onto the wheel hub. Ensure it rotates freely without excessive tightening.

8. Reassemble the Wheel Place the wheel back on, hand-tighten the lug nuts, lower the vehicle from the jack stands, and fully tighten the lug nuts in a crisscross pattern to ensure even pressure.

9. Test the Brakes Before hitting the road, pump the brake pedal several times to seat the new brake shoes against the drum. This is crucial for ensuring they are properly engaged.

10. Final Check After a short test drive, check the rear brakes for any unusual noises or behaviors. Ensure everything is functioning correctly.

Conclusion

Replacing rear drum brakes can seem daunting, but with the right tools, knowledge, and patience, it can be a straightforward task. Regular maintenance not only prolongs the life of your braking system but also enhances your vehicle's overall safety and performance. If you’re ever in doubt, don’t hesitate to consult a professional mechanic. Safe driving!