how to rebuild drum brakes

How to Rebuild Drum Brakes

Rebuilding drum brakes might seem like a daunting task, but with the right tools, some patience, and a bit of mechanical knowledge, it can be a rewarding DIY project. Drum brakes are a common braking system in many vehicles, especially in older models and on the rear wheels of many cars. This guide will walk you through the steps required to successfully rebuild drum brakes.

Tools and Materials Needed

Before starting your rebuild, gather all necessary tools and materials

- Brake rebuild kit (including shoes, springs, and other components) - Brake cleaner - Brake grease - Ratchet set and sockets - Screwdrivers (flathead and Phillips) - Pliers - A drum brake tool kit (optional but useful) - Torque wrench - Floor jack and jack stands - Safety goggles and gloves

Safety First

Always prioritize safety when working on your vehicle. Wear safety goggles and gloves to protect yourself from debris and brake dust. Ensure the vehicle is securely lifted and supported on jack stands before crawling underneath it.

Step 1 Remove the Wheel and Brake Drum

1. Loosen the lug nuts slightly while the vehicle is still on the ground. This will make it easier to remove the wheel once the vehicle is lifted. 2. Lift the vehicle using a floor jack and secure it on jack stands.

3. Remove the lug nuts and take off the wheel.

4. Remove the brake drum by pulling it straight off the hub. If it is stuck, you may need to tap it gently with a rubber mallet.

Step 2 Inspect Components

Once the drum is off, inspect all components for wear or damage. Look at the brake shoes, springs, and wheel cylinder. If any parts are worn beyond the manufacturer’s specifications, they will need to be replaced.

Step 3 Remove the Old Hardware

1. Take photos or make notes of the brake assembly layout. This will help you during reassembly.

2. Remove the brake shoes by disconnecting the springs and brackets using pliers or a brake tool.

3. Take out the wheel cylinder if it’s leaking or damaged. This typically involves removing a couple of bolts and disconnecting the brake line. Be prepared for some brake fluid to leak out.

Step 4 Clean the Components

Use brake cleaner to thoroughly clean the interior of the drum and all other components. Remove any dust or debris, as this can affect the performance of the new shoes. Ensure that the surface where the shoes sit is smooth and free of rust or dirt.

Step 5 Install New Hardware

1. Install the new wheel cylinder, ensuring it is securely mounted.

2. Attach the new brake shoes to the backing plate. Follow the layout you documented, and attach the return springs and adjusters.

3. Use brake grease on the backing plate where the shoes make contact. This will reduce friction and improve performance.

Step 6 Reassemble the Drum

1. Place the drum back onto the hub, ensuring it fits snugly. Check for any issues such as misalignment.

2. If your drum requires adjustment, use the adjuster mechanism to set the right clearance between the shoes and the drum.

Step 7 Reinstall the Wheel

1. Place the wheel back onto the hub and hand-tighten the lug nuts.

2. Lower the vehicle back to the ground and use a torque wrench to tighten the lug nuts to the vehicle's specifications.

Step 8 Test the Brakes

Before driving, pump the brake pedal several times to ensure the brake shoes seat properly against the drum. Check for any unusual sounds and ensure the braking performance feels strong and responsive.

Conclusion

Rebuilding drum brakes can enhance the safety and performance of your vehicle. With careful attention to detail and safety, this DIY project can save you money and give you a sense of accomplishment. If you encounter any issues or feel unsure at any point, don't hesitate to consult a professional mechanic for assistance. Happy rebuilding!