how to deglaze brake drums

How to Deglaze Brake Drums A Step-by-Step Guide

Maintaining your vehicle's braking system is crucial for safe driving, and one essential part of that maintenance is deglazing the brake drums. Over time, drum brakes can develop a glossy, hardened surface due to friction, compromising their effectiveness. In this article, we'll explore what glazing is, why it's important to deglaze brake drums, and a step-by-step guide on how to do it yourself.

Understanding Glazing

Glazing occurs when the friction material of the brake shoes wears down and heats up, leading to a smooth, shiny surface on the brake drum. This prevents the brake shoes from making proper contact with the drum, reducing the braking power and potentially leading to longer stopping distances or brake failure. Signs of glazed brake drums include squeaking or squealing noises during braking, reduced braking response, and a sensation of the brakes not engaging properly.

Why You Should Deglaze Brake Drums

Deglazing is an essential maintenance task that helps restore the correct surface texture of the brake drum. It ensures that the brake shoes can grip the drum effectively, improving braking performance and safety. Regularly performing this maintenance can prolong the life of your brake components, enhance the vehicle's overall performance, and potentially save you money in the long run.

Tools and Materials Needed

Before you start the deglazing process, gather the following tools and materials

- Vehicle jack and jack stands - Lug wrench - Brake cleaner - Sandpaper (preferably 80-120 grit) - Brake shoe cleaning tool or a wire brush - Safety goggles and gloves - Optional Replacement brake shoes (if necessary)

Step-by-Step Guide to Deglazing Brake Drums

Step 1 Safety First

Begin by parking your vehicle on a level surface and engaging the parking brake. Always wear safety goggles and gloves to protect yourself from debris and chemicals.

Step 2 Lift the Vehicle

Using the vehicle jack, lift the rear of your vehicle (if it's a rear drum brake setup) and securely position it on jack stands. Make sure the vehicle is stable before you proceed.

Step 3 Remove the Wheel

Using a lug wrench, remove the bolts securing the wheel to the hub. Take the wheel off to expose the brake drum.

Before deglazing, inspect the brake drum for any cracks or noticeable wear. If there are significant issues, consider replacing the drum rather than deglazing. If the drum appears sound, you can proceed with the deglazing process.

Step 5 Clean the Brake Drum

Spray the brake cleaner onto the surface of the drum and wipe it down with a clean rag to remove dust and debris accumulated from the brake shoes. A clean surface is essential for effective deglazing.

Step 6 Deglazing the Brake Drum

Using coarse sandpaper (around 80-120 grit), gently sand the outer surface of the brake drum. Aim to remove the glossy layer without creating deep scratches. Keep the sanding even and maintain a consistent pressure. This will help create the necessary texture for better brake shoe contact.

Step 7 Clean Again

After sanding, clean the drum once more with brake cleaner to remove any residue or dust created during the sanding process.

Step 8 Inspect and Clean the Brake Shoes

Inspect the brake shoes for wear. If they are glazed as well, you may need to lightly sand them using the same sandpaper. Clean them with a wire brush or brake shoe cleaning tool to remove dust and debris.

Step 9 Reassemble Everything

Once the drum and shoes are clean and deglazed, reassemble all components. First, place the brake drum back onto the hub, followed by the wheel. Securely fasten the lug nuts before lowering the vehicle.

Step 10 Test Your Brakes

Once everything is back in place and the vehicle is lowered, start the vehicle and gently test the brakes at a low speed. Listen for any unusual noises and ensure that the brakes engage smoothly.

Conclusion

Deglazing brake drums is a simple yet effective way to enhance your vehicle’s braking performance. With some basic tools and diligence, you can maintain your braking system and extend the lifespan of your components. Always prioritize safety during this process, and don’t hesitate to seek professional help if you encounter any complications. Remember, effective brakes are a key component of vehicle safety.