how to adjust brake drums on cars

Dec . 05, 2024 15:22 Back to list

how to adjust brake drums on cars

How to Adjust Brake Drums on Cars

Brake drums are a crucial component of a vehicle's braking system, particularly in older models and certain types of vehicles like trucks and vans. Proper adjustment of brake drums is essential for safe and efficient braking performance. If you notice that your brakes are not as responsive as they should be, it may be time to adjust the brake drums. This guide will walk you through the process of adjusting brake drums on your car.

Understanding Brake Drums

Brake drums work in conjunction with brake shoes. When you apply the brakes, hydraulic pressure forces the brake shoes out against the inside of the brake drum, creating friction to slow down the vehicle. Over time, due to wear and tear or brake shoe adjustment settings, the gap between the brake shoes and the drum can increase, leading to decreased braking efficiency. Therefore, regular adjustment is necessary to maintain optimal brake performance.

Tools You Will Need

Before you start the adjustment process, gather the following tools

- Jack and jack stands - Wheel chocks - Lug wrench - Brake adjustment tool (or a flathead screwdriver) - Safety gloves and goggles

Step-by-Step Guide to Adjusting Brake Drums

1. Safety First Park your car on a flat, level surface and engage the parking brake. Place wheel chocks behind the rear wheels (if you're adjusting front drums) or in front of the front wheels (if adjusting rear drums). Wear safety gloves and goggles to protect yourself.

2. Lift the Vehicle Use the jack to lift the corner of the car where you will be adjusting the brakes. Secure the vehicle with jack stands to ensure it is stable.

how to adjust brake drums on cars

3. Remove the Wheel Once the car is elevated and secure, remove the lug nuts using a lug wrench and take off the wheel. This will expose the brake drum.

4. Inspect the Brake Drum and Shoes Before making any adjustments, inspect the brake drum and brake shoes for wear. If the brake shoes are worn down excessively or the drum has become warped, they may need to be replaced rather than just adjusted.

5. Locate the Adjustment Mechanism The brake adjustment mechanism is typically found at the bottom of the brake assembly. It can be a star wheel that needs to be turned to adjust the brake shoes.

6. Adjust the Brake Shoes Using your brake adjustment tool or a flathead screwdriver, turn the star wheel. Turn it clockwise to expand the brake shoes outward against the drum and counterclockwise to retract them. It is essential to make small adjustments and check frequently.

7. Check Brake Shoe Clearance After making adjustments, spin the brake drum by hand to see if it rotates freely. You should feel slight resistance, but the drum should not be overly tight. Continue adjusting until you achieve the desired clearance.

8. Reassemble and Test Once the shoes are adjusted correctly, reattach the wheel and secure it with lug nuts. Lower the vehicle back to the ground and remove the wheel chocks.

9. Test the Brakes Start the vehicle and gently test the brakes while driving in a safe, quiet area. Pay attention to how the brakes respond. If they feel firm and responsive, the adjustment was successful.

10. Repeat as Necessary Regular maintenance of brake drums is necessary for optimal performance. Check and adjust your brake drums every 6,000 to 12,000 miles, or as recommended in your vehicle owner's manual.

Conclusion

Adjusting brake drums is a straightforward process that can greatly enhance your vehicle's braking performance. Regular maintenance ensures not only the longevity of your braking components but also your safety on the road. If you are unsure about performing this process or find any issues beyond adjustment, it is advisable to seek help from a professional mechanic. Taking care of your brake system is essential for safe driving, so don't overlook this critical maintenance task!