how to release rear drum brakes

How to Release Rear Drum Brakes A Step-by-Step Guide

Rear drum brakes are a common feature in many vehicles, especially in older models and some lightweight cars. Unlike disc brakes, which use a caliper to clamp down on a rotor, drum brakes operate using a different mechanism that can be a bit more complex. When it's time to service or replace the brake components, it's crucial to know how to release rear drum brakes properly to avoid damage and ensure safety. In this article, we will walk you through the steps to release rear drum brakes effectively.

Understanding the Components

Before diving into the step-by-step guide, it’s important to familiarize yourself with the components of drum brakes. The main parts include the brake drum, brake shoes, wheel cylinder, and the adjusting screw. The brake drum encases the brake shoes and spins with the wheel, while the shoes press against the inner surface of the drum to create friction and stop the vehicle. The wheel cylinder pushes the shoes apart when you apply the brakes, and the adjusting screw helps maintain the distance between the shoes and drum.

Tools You Will Need

- Jack and jack stands - Tire iron - Brake cleaner - Screwdriver (flat and Phillips) - Wrench set - Brake spring tool (optional) - Safety goggles and gloves

Step-by-Step Process to Release Rear Drum Brakes

Step 1 Safety First

Before you begin any brake work, ensure your vehicle is parked on a level surface, and the engine is off. Engage the parking brake and wear safety goggles and gloves to protect yourself from debris and contamination.

Step 2 Remove the Wheel

Using a tire iron, loosen the lug nuts on the wheel that covers the drum brake. Once loosened, jack up the rear of the vehicle and securely place it on jack stands. Remove the lug nuts completely and take off the wheel to expose the brake drum.

Step 3 Inspect the Brake Assembly

With the wheel removed, take a moment to inspect the brake assembly. Look for signs of wear on the drum and shoes, any fluid leaks from the wheel cylinder, and ensure the return springs are intact. This preliminary inspection helps also in understanding how everything fits together.

Step 4 Release the Adjuster

Locate the adjuster mechanism, which is usually positioned at the bottom of the brake assembly. It will be a small wheel or a screw. To release the brake shoes from the drum, you need to turn the adjuster back (counterclockwise) to retract the shoes. Use a screwdriver to turn the adjuster wheel if necessary. Keep adjusting until there is enough space for the drum to slide off.

Step 5 Remove the Drum

Once the shoes are retracted enough, you can try to slide the drum off the hub. If it doesn't come off easily, gently tap on the edges with a rubber mallet. Avoid using excessive force, as this can damage the drum or the shoes.

Step 6 Inspect and Clean

With the drum removed, inspect the inner surface of the drum for grooves or scoring. Clean any dust or debris with brake cleaner. Check the brake shoes for thickness; if they are worn down significantly (less than 1/4 inch), you should consider replacing them.

Step 7 Reassemble

If you are simply servicing the brakes, replace the drum by reversing the steps above. Ensure the adjusting mechanism is set back to its original position or adjust as necessary for your vehicle’s specifications. Reattach the wheel and hand-tighten the lug nuts before lowering the vehicle back to the ground.

Step 8 Test

Once everything is back in place, pump the brake pedal a few times to seat the new shoes (if replaced) against the drum. Check that the brake engages smoothly and listen for any unusual sounds.

Conclusion

Releasing rear drum brakes can seem daunting, but by following these steps carefully, you can manage the task safely and efficiently. Regular maintenance of your brake system is essential for vehicle safety and performance. If you encounter any issues beyond your skill level, don't hesitate to seek professional assistance. Keeping your brakes in good working condition will enhance your vehicle's longevity and ensure your safety on the road.