How to Adjust Drum Brakes Using the Parking Brake Technique

Adjusting Drum Brakes with Parking Brake A Comprehensive Guide

Drum brakes are a common component in many vehicles, providing essential stopping power and safety. Over time, adjustments may be necessary to maintain optimal performance, especially in conjunction with the parking brake system. Understanding how to adjust drum brakes can not only enhance your vehicle's braking efficiency but also prolong the lifespan of its components. This article will provide a detailed overview of how to adjust drum brakes in conjunction with the parking brake.

Understanding Drum Brakes

Drum brakes operate using friction generated by brake shoes that press against a spinning drum. When you depress the brake pedal, hydraulic pressure forces the shoes outward against the drum, creating friction and slowing down the vehicle. A parking brake (also known as an emergency brake) typically uses a similar system but is activated via a lever or pedal when the vehicle is stationary.

Importance of Proper Adjustment

Properly adjusted drum brakes are crucial for vehicle safety. If the brake shoes are too loose, the vehicle may take longer to stop. Conversely, if they are too tight, they can cause premature wear and overheating, leading to potential brake failure. Moreover, the parking brake should also be adjusted correctly to ensure it holds the vehicle in place when parked.

Tools You'll Need

Before you start the adjustment process, make sure you have the following tools - Jack and jack stands - Lug wrench - Brake adjustment tool or screwdriver - Ruler or feeler gauge - Safety glasses and gloves

1. Safety First Begin by parking your vehicle on a flat surface and engaging the parking brake. Wear safety glasses and gloves to protect yourself while working.

2. Remove the Wheel Use the lug wrench to loosen the lug nuts and then lift the vehicle with a jack. Secure it with jack stands before removing the wheel.

3. Inspect the Braking System With the wheel off, inspect the brake drum and shoes for signs of wear. Look for uneven wear patterns, cracks in the drum, or worn-out brake shoes.

4. Access the Brake Drum Depending on your vehicle, you may need to remove additional components like the drum itself to access the brake shoes. Look for retaining screws or clips that need to be removed. Some models might require a puller to detach the drum.

5. Adjust the Brake Shoes Locate the adjuster mechanism at the bottom of the brake assembly. Turning the adjuster will move the shoes closer or farther from the drum. Turning it clockwise usually tightens the shoes, while counterclockwise loosens them. The goal is to achieve a slight drag when the drum is spun by hand—generally, you want to ensure that the shoes are not too tight and have just enough contact.

6. Check the Parking Brake With the brake shoes adjusted, you should also check the parking brake system. If your vehicle has a separate adjustment point for the parking brake, consult your owner’s manual. Adjust the cable or lever until you achieve sufficient tension to hold the vehicle in place without excessive strain.

7. Reassemble and Test Once both the drum brakes and the parking brake are adjusted, reassemble any components you previously removed, reinstall the wheel, and lower the vehicle. Tighten the lug nuts in a crisscross pattern to ensure they are securely fastened. Finally, test the brakes by pressing the pedal and engaging the parking brake to ensure they function correctly.

Conclusion

Adjusting drum brakes in conjunction with the parking brake may seem daunting, but with the right tools and knowledge, it can be a straightforward process. Regular maintenance and timely adjustments not only enhance braking performance but also contribute to overall vehicle safety. Always consult your vehicle’s service manual for specific instructions tailored to your model, and consider seeking professional assistance if you are uncertain about any steps in the process. Keeping your braking system in top condition is essential for safe driving on the road.