how to rebuild rear drum brakes

How to Rebuild Rear Drum Brakes

Rear drum brakes are a common type of braking system found on many vehicles, especially older models. Over time, these brakes can wear down, leading to reduced braking efficiency and safety concerns. Rebuilding your rear drum brakes can not only restore their performance but also extend their lifespan. This article provides a step-by-step guide on how to rebuild rear drum brakes effectively.

Tools and Materials Needed

Before starting the rebuild process, gather the necessary tools and materials

- Socket wrench set - Screwdrivers (flathead and Phillips) - Brake drum puller - Brake cleaner - Brake parts kit (shoes, springs, and hardware) - New brake drums (if necessary) - Torque wrench - Safety glasses and gloves

Step 1 Prepare the Vehicle

1. Safety First Ensure the vehicle is parked on a flat surface. Engage the parking brake and place wheel chocks around the front wheels to prevent rolling. 2. Loosen Lug Nuts Before lifting the vehicle, slightly loosen the lug nuts on the rear wheels but do not remove them completely.

Step 2 Raise the Vehicle

1. Lift the Vehicle Use a jack to raise the rear end of the vehicle. Secure it on jack stands to ensure stability. 2. Remove the Wheels Fully remove the lug nuts and take off the rear wheels to access the drum brakes.

Step 3 Remove the Brake Drums

1. Inspect the Drums Check the brake drums for signs of wear or damage. If they have deep grooves or cracks, they should be replaced. 2. Remove the Brake Drum If the drum is stuck, gently tap it with a hammer or use a brake drum puller to release it.

Step 4 Disassemble the Brake Components

1. Take Photos Before disassembly, take photos of the brake assembly for reference. This will help during reassembly. 2. Remove the Old Brake Shoes Unclip the springs and remove the old brake shoes. Be cautious as the springs can be under tension. 3. Detach the Hardware Take off the hold-down springs, adjuster, and other hardware components.

Step 5 Clean the Components

1. Clean the Drums Use brake cleaner to remove dust and dirt from the brake drums and other components. Make sure the surfaces are free from grease and debris. 2. Inspect Components Check the backing plate, wheel cylinders, and other components for wear or damage. Replace any worn parts.

Step 6 Install New Brake Shoes and Hardware

1. Install New Shoes Using the photos taken earlier as a guide, install the new brake shoes. Make sure the primary shoe (larger) is installed correctly. 2. Attach New Hardware Install the hold-down springs, adjuster, and any other hardware included in the brake parts kit. 3. Reinstall the Brake Drums Place the brake drum back onto the hub, ensuring it spins freely without dragging.

Step 7 Reassemble the Brake System

1. Reinstall the Wheels Put the rear wheels back on the vehicle and hand-tighten the lug nuts. 2. Lower the Vehicle Remove the jack stands and lower the vehicle back to the ground. 3. Tighten Lug Nuts Use a torque wrench to tighten the lug nuts to the manufacturer’s specifications.

Step 8 Test the Brake System

1. Check Brake Functionality Before taking the vehicle on the road, pump the brake pedal a few times to seat the new shoes against the drum. 2. Test Drive Take the vehicle for a short test drive to ensure the brakes are functioning properly. Listen for any unusual noises and ensure there are no dragging brakes.

Conclusion

Rebuilding rear drum brakes can seem like a daunting task, but with the right tools and patience, it can be a rewarding DIY project. Regular maintenance and timely rebuilding can prevent costly repairs and ensure your braking system operates effectively. Always prioritize safety and consult your vehicle’s manual for specific instructions. By keeping your rear drum brakes in good condition, you can enhance your vehicle's performance and safety on the road.