parking brake adjustment drum brakes

Parking Brake Adjustment for Drum Brakes A Comprehensive Guide

Proper maintenance of a vehicle is essential for ensuring safety and performance, and one crucial aspect that often gets overlooked is the parking brake. The parking brake, or handbrake, is a vital component that prevents the vehicle from rolling when parked. Drum brakes, commonly found in older vehicles and some modern models, require specific attention to maintain optimal functionality. This article will delve into the importance of adjusting the parking brake on drum brakes, the signs that indicate the need for adjustment, and a step-by-step guide on how to perform the adjustment.

Importance of Parking Brake Adjustment

The parking brake serves as a secondary braking system that holds the vehicle stationary. It is particularly important when parking on inclines or declines. Over time, the components of the parking brake may wear down, leading to a significant loss of effectiveness. If not adjusted properly, the parking brake might not engage fully, which can result in dangerous situations, such as the vehicle rolling away unexpectedly. Therefore, regular adjustments ensure that your parking brake functions correctly, providing added safety and peace of mind.

Signs that Adjustment is Needed

1. Increased Lever Travel If you find that you have to pull the parking brake lever up higher than usual to engage the brake fully, it may be time for an adjustment.

2. Ineffective Holding Power When parked on a slope, if the vehicle rolls slightly despite the parking brake being engaged, it indicates that the brake is not functioning properly.

3. Unusual Noises Any grinding, squeaking, or clicking noises when pulling the parking brake should be investigated. Such sounds could suggest that the brake shoes are either worn or misaligned.

4. Warning Light In some vehicles, a dashboard warning light may indicate a malfunction with the braking system, prompting inspection and possible adjustment.

Step-by-Step Guide to Adjusting the Parking Brake on Drum Brakes

Tools Needed

- Jack and jack stands - Lug wrench - Screwdriver - Wrench set - Brake cleaner - Rags

Procedure

1. Safety First Park the vehicle on a level surface and engage the main brakes. Ensure the engine is off, and the keys are removed. You may also want to wear safety goggles.

2. Lift the Vehicle Use the jack to raise the vehicle and secure it with jack stands. Remove the rear wheels using a lug wrench.

3. Inspect the Brake Assembly Once the wheels are off, inspect the drum brake assembly. Look for any obvious wear on the brake shoes or hardware.

4. Locate the Adjuster Inside the drum, there should be an adjuster mechanism—usually a star wheel or a threaded rod—meant for adjusting the clearance between the brake shoes and the drum.

5. Adjust the Shoes Use a screwdriver or a brake adjusting tool to turn the adjuster. If it’s a star wheel, you will turn it in one direction to expand the shoes and in the opposite direction to retract them. The goal is to find a snug fit where the shoes almost touch the drum but do not drag when the brakes are not engaged.

6. Reassemble and Lower the Vehicle Once the adjustment is complete, reattach the drum and the wheels. Secure the lug nuts and lower the vehicle back to the ground.

7. Test the Parking Brake Start the vehicle and test the parking brake. It should engage firmly and hold the vehicle in place when on an incline. If additional adjustments are needed, repeat the process.

Conclusion

Adjusting the parking brake on drum brakes is a straightforward yet critical maintenance task. Regular checks and adjustments can significantly enhance the safety and reliability of your vehicle. If you feel uncomfortable performing this task, it is advisable to seek the assistance of a professional mechanic. Always prioritize safety and ensure that your vehicle is well-maintained to enjoy a worry-free driving experience.