how to replace rear drum brake pads

How to Replace Rear Drum Brake Pads

Changing the rear drum brake pads is an important skill for any DIY car enthusiast. Drum brakes are commonly found on many vehicles, especially older models and some trucks. Although drum brakes function differently than disc brakes, the process of replacing the brake pads, or more accurately the brake shoes, is relatively straightforward. This guide will walk you through the essential steps needed to replace your rear drum brake pads safely and effectively.

Tools and Materials Needed

Before you begin the process, gather the following tools and materials

1. Tools - Jack and jack stands - Socket and ratchet set - Brake cleaner - Brake spring tool - Flathead screwdriver - Torque wrench - Pliers - Wooden block or rubber mallet

2. Materials - New brake shoes - Brake lubricant - Replacement hardware kit (if necessary)

Step-by-Step Guide

1. Prepare Your Vehicle

Before starting, ensure your vehicle is parked on a level surface. Engage the parking brake to avoid any accidents. If applicable, disconnect the negative terminal of the battery to prevent any electrical issues.

2. Lift the Vehicle

Using the jack, lift the rear of your vehicle and support it securely on jack stands. Take care to never work under a vehicle supported only by a jack.

3. Remove the Wheel

Using a socket wrench, remove the lug nuts from the rear wheel and take the wheel off to expose the drum brake assembly.

4. Inspect the Brake Drum

Before removing the brake drum, inspect it for any signs of damage or wear. If the drum is excessively worn or scored, it may need to be replaced or resurfaced.

5. Remove the Brake Drum

If the drum does not slide off easily, you may need to tap it gently with a rubber mallet to loosen any corrosion. Once it's loose, pull it straight off. Be cautious; sometimes, the shoes may still be slightly engaged with the drum.

6. Remove the Old Brake Shoes

Observe how the old brake shoes are installed before removing them; this will help you when installing the new ones. Using a brake spring tool, remove the return springs and any other retaining hardware. Keep track of how everything is assembled. Once the springs are detached, carefully pull the brake shoes away from the backing plate.

7. Clean the Components

Use brake cleaner to thoroughly clean the brake components, including the backing plate. Remove any dust, debris, or old grease, ensuring a smooth surface for the new parts. Be sure to wear a mask and goggles to protect yourself from airborne debris.

8. Install New Brake Shoes

Take your new brake shoes and compare them with the old ones to confirm they are the same size. Attach the new shoes to the backing plate in the reverse order of removal. As you do this, reinstall the retaining hardware and springs. Ensure everything is securely fastened, and the shoes are aligned properly.

9. Reassemble the Brake Drum

Once the new shoes are in place, lubricate the friction points with brake lubricant (make sure to avoid where the shoes make contact with the drum). Slide the brake drum back onto the wheel hub, ensuring it fits correctly.

10. Reinstall the Wheel

Position the wheel back onto the hub and hand-tighten the lug nuts. Once they are snug, lower the vehicle from the jack stands and onto the ground. Using a torque wrench, tighten the lug nuts to the manufacturer’s specifications.

11. Test Your Brakes

Before taking your vehicle out on the road, pump the brake pedal a few times to set the brake shoes against the drum. Check the operation of the brake pedal and listen for any unusual noises.

Conclusion

Replacing rear drum brake pads is a manageable task that can save you money and give you a sense of accomplishment. With the right tools and patience, you can ensure your vehicle's braking system is functioning correctly. If at any point you feel uncertain, don't hesitate to consult a professional mechanic. Safety should always be your top priority when working on your vehicle. Happy braking!