Steps to Tweak the Emergency Brake on Drum Brake Systems

How to Adjust the Emergency Brake on Drum Brakes

When it comes to vehicle maintenance, one crucial yet often overlooked component is the emergency brake, also known as the parking brake. If your car is equipped with drum brakes, proper adjustment of the emergency brake is essential for safety and reliable performance. In this article, we will guide you through the steps to adjust the emergency brake on drum brakes effectively.

Understanding the Emergency Brake System

The emergency brake operates separately from the regular braking system and is designed to keep your vehicle stationary when parked. In drum brake systems, the emergency brake typically uses a cable that pulls lever arms, which then engages the brake shoes inside the drum. Over time, this cable can stretch, or the brake shoes may wear down, leading to reduced effectiveness. Regular adjustments ensure that the emergency brake remains functional.

Tools You’ll Need

Before starting the adjustment process, gather the following tools - A socket wrench set - Pliers - A jack and jack stands (or ramps) - A screwdriver - Brake cleaner (optional) - Safety gloves and goggles

Step-by-Step Guide to Adjusting the Emergency Brake

1. Preparation Ensure your vehicle is parked on a level surface. If you have wheel chocks, place them around the front wheels to prevent the vehicle from rolling. Put on your safety gloves and goggles before beginning.

2. Lift the Vehicle Using a jack, lift the rear of your vehicle and secure it on jack stands. This will allow you easy access to the rear wheels. If you prefer, you can use ramps to elevate the rear.

3. Inspect the Brake Components Remove the wheel cover or lug nuts and take off the wheel to expose the drum brake assembly. Inspect the brake shoes for wear. If they are worn down significantly, you'll need to replace them before adjusting the emergency brake.

4. Locate the Adjuster Inside the drum brake assembly, you will find an adjuster that connects the brake shoes. This can either be a star wheel adjuster (which is turned with a screwdriver) or an automatic adjuster that may require specific handling.

5. Adjust the Brake Shoes Using your screwdriver or the appropriate tool, adjust the shoes away from the drum until they barely touch the drum surface. For star wheel adjusters, turn the adjuster clockwise to expand the shoes. Make sure to check frequently for drag as you adjust.

6. Check the Emergency Brake Cable The cable connecting the emergency brake lever to the brake mechanism may also need adjustment. Look for an adjustment nut along the cable near the rear assembly. Loosen the nut slightly and pull the cable taut for better response. Tighten the nut back down to secure it.

7. Test the Emergency Brake Put the wheel back on and lower the vehicle from the jack stands. Next, engage the emergency brake and test its functionality. The lever should hold firm without requiring excessive force. You may need to repeat the adjustment steps if the brake does not hold as expected.

8. Final Inspection After confirming that the emergency brake works effectively, inspect the area for any signs of wear or damage. Look for leaks around the brake lines or the brake assembly. If everything appears to be in order, you can replace the wheel cover or lug nuts.

Conclusion

Adjusting the emergency brake on drum brakes may sound complex, but by following these straightforward steps, you can ensure that your vehicle is safe and ready for use. Performing regular maintenance on your emergency brake not only enhances safety but can also prolong the life of your brake components. Remember, if you are ever in doubt, consulting a professional mechanic is always the best course of action. Happy driving!