how to adjust self-adjusting drum brakes

How to Adjust Self-Adjusting Drum Brakes

Self-adjusting drum brakes are a critical component of your vehicle's braking system, providing the necessary stopping power while ensuring safety. Over time, these brakes may wear down, requiring adjustments to ensure they function optimally. Understanding how to adjust these brakes can save you time and money while enhancing your vehicle's safety. In this guide, we'll walk you through the process of adjusting self-adjusting drum brakes.

Understanding Self-Adjusting Drum Brakes

Before delving into the adjustment process, it's essential to understand how self-adjusting drum brakes work. Unlike traditional drum brakes that require manual adjustment, self-adjusting brakes utilize an internal mechanism designed to make automatic adjustments as the brake shoes wear down. This mechanism typically relies on a lever and a ratchet system, which engages whenever the brakes are applied. However, if your brakes are squeaking, pulsating, or the pedal feels soft, it may indicate a need for adjustment.

Tools Required

To adjust your self-adjusting drum brakes, you will need a few tools 1. Jack and jack stands 2. Lug wrench 3. Brake adjusting tool or flathead screwdriver 4. Clean shop towels 5. Brake cleaner

Step-by-Step Adjustment Process

1. Safety First Ensure your vehicle is parked on a level surface. Engage the parking brake and switch off the ignition to prevent accidental movement. 2. Loosen the Lug Nuts Use a lug wrench to slightly loosen the lug nuts of the wheel. Do not remove them completely yet.

Step 2 Lifting the Vehicle

1. Jack Up the Vehicle Use a jack to lift the vehicle and place it securely on jack stands. This will allow you to safely work on the wheel. 2. Remove the Wheel Take off the loosened lug nuts and remove the wheel to expose the drum brakes.

Step 3 Inspecting the Drum Brakes

1. Inspect the Brake Components Before adjusting, visually inspect the brake drums, shoes, and hardware for wear or damage. If the brake shoes are worn down significantly, they may need replacing rather than just adjusting. 2. Clean the Assembly Use brake cleaner and shop towels to clean any dust or debris from the brake assembly.

Step 4 Adjusting the Brake Shoes

1. Locate the Adjuster Inside the drum brake assembly, locate the adjusting mechanism. It typically resembles a metallic lever or a wheel that can be turned. 2. Adjust the Mechanism Depending on your brake type, either - For a lever Use a flathead screwdriver to pry the lever up or down as needed. This will engage the ratchet mechanism to expand the brake shoes. - For a wheel Rotate the adjuster wheel to increase the tension on the brake shoes. Generally, turn it clockwise to tighten. 3. Check for Proper Contact After adjusting, turn the drum by hand to ensure the brake shoes are making contact without binding. You should feel a slight resistance as the shoes touch the drum, but they should not be overly tight.

Step 5 Reassemble and Test

1. Reattach the Wheel Place the wheel back on the hub, tighten the lug nuts by hand, and lower the vehicle back to the ground. 2. Tighten the Lug Nuts Once the vehicle is on the ground, fully tighten the lug nuts in a crisscross pattern to ensure even pressure. 3. Test Drive Take your vehicle for a short test drive in a safe area to check the effectiveness of your adjustments. Ensure the brakes engage smoothly without any unusual noises.

Conclusion

Adjusting self-adjusting drum brakes is a straightforward process that requires minimal tools and time. Regular maintenance checks can help prolong the life of your brake system, ensuring your safety on the road. If you encounter persistent issues or feel uncomfortable performing the adjustments yourself, it is always advisable to consult with a professional mechanic. Keeping your brakes in top condition is essential for your safety and the longevity of your vehicle.