how to deglaze brake drums

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

Brake drums are a crucial component in many vehicle braking systems, particularly in older models and heavier vehicles. Over time, brake drums can become glazed due to excessive heat buildup and friction from brake shoes. This glazing can lead to reduced braking performance, increased stopping distances, and potential safety hazards. Fortunately, deglazing brake drums is a relatively straightforward process that can help restore their efficacy. Here’s a step-by-step guide on how to do it properly.

Tools and Materials Needed

- Safety goggles - Gloves - Brake cleaner - Sandpaper or a brake drum deglazing tool - Brake shoe adjustment tool - Wrenches or socket set - Torque wrench - Clean cloths

Step 1 Safety First

Before starting any work on your vehicle, ensure you are wearing safety goggles and gloves. Safety should always be your top priority when working on brake components.

Begin by parking your vehicle on a flat surface and engaging the parking brake. Loosen the lug nuts on the wheel but do not remove them completely. Use a jack to lift the vehicle and securely support it with jack stands.

Step 3 Remove the Wheel and Drum

Once the vehicle is securely lifted, remove the wheel by fully unscrewing the lug nuts. With the wheel off, access the brake drum by removing any retaining screws or clips. Carefully slide the brake drum off the hub. If it’s stuck, you may need to tap it gently with a hammer.

Step 4 Inspect the Drum

Before deglazing, inspect the brake drum for any visible damage, such as deep grooves or cracks. If the drum is damaged, it may need to be replaced rather than deglazed. Additionally, ensure that the surface is clean and free of debris, as this will help the deglazing process.

Step 5 Deglaze the Brake Drum

Using sandpaper (preferably 120-grit) or a dedicated deglazing tool, gently sand the inner surface of the brake drum. Apply even pressure and make sure to cover the entire surface. The goal is to remove the smooth, shiny layer without altering the drum’s integrity. A few consistent passes should be enough.

Step 6 Clean and Reassemble

After deglazing, clean the drum thoroughly with brake cleaner to remove any dust and debris created during sanding. Ensure it is completely dry before reassembly. In the meantime, inspect the brake shoes and adjust them if necessary.

Once everything is cleaned and inspected, slide the brake drum back onto the hub and secure any retaining clips or screws. Reinstall the wheel, tightening the lug nuts securely.

Step 7 Lower and Test

Carefully lower the vehicle from the jack stands and re-tighten the lug nuts to the manufacturer’s specified torque settings. Finally, take the vehicle for a short test drive to ensure the brakes are functioning correctly and any noise or vibration issues have been resolved.

Conclusion

Deglazing brake drums is an essential maintenance task that can significantly improve your vehicle's braking performance. By following these steps, you can undertake this procedure safely and effectively, ensuring a smoother and safer driving experience. Remember, if you feel uncertain at any stage, it’s always best to consult a professional mechanic.