how to release rear drum brakes

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

Rear drum brakes are a type of braking mechanism commonly found in older vehicles and some newer models, particularly those designed for towing or heavy loads. While they have their advantages, including simplicity and cost-effectiveness, they can sometimes be tricky when it comes to maintenance and troubleshooting, particularly when it comes to releasing them. This guide will walk you through the process of releasing rear drum brakes, ensuring safety and efficiency.

Understanding Rear Drum Brakes

Before delving into the mechanics of releasing rear drum brakes, it is essential to understand how they work. Drum brakes operate through friction created when brake shoes press against the inner surface of a rotating drum attached to the wheel. When you step on the brake pedal, hydraulic fluid forces the brake shoes outward against the drum, slowing or stopping the vehicle.

However, this mechanism can sometimes malfunction, leading to issues where the brakes stick or do not release properly. Common causes of this problem include rust, misalignment, or a malfunctioning brake system.

Step-by-Step Guide to Releasing Rear Drum Brakes

1. Safety First

Before starting any maintenance on your vehicle, ensure you are in a safe environment. Park your car on a flat, stable surface, set the parking brake to prevent rolling, and disconnect the battery to avoid electrical issues. Wearing gloves and safety goggles is recommended to protect yourself from debris and chemicals.

2. Inspect the Brake System

Begin by visually inspecting the rear drum brake assembly for any obvious signs of damage, wear, or corrosion. Look for leaking brake fluid, cracked drum surfaces, or worn-out brake shoes. If any major defects are found, it may be necessary to replace components rather than just releasing the brakes.

3. Manually Adjusting the Brakes

Often, rear drum brakes can become misadjusted, causing them to engage improperly. To adjust, locate the adjustment wheel or star wheel mechanism, which is typically situated at the bottom of the drum assembly. Use a brake adjusting tool or a flat-head screwdriver to turn the adjustment wheel. Turning it clockwise will tighten the brakes, while counterclockwise will loosen them. Adjust until you achieve a proper clearance between the brake shoes and the drum.

4. Lubricate Components

A common reason for rear drum brakes to stick is lack of lubrication. Carefully apply a high-temperature brake grease to contact points of the brake shoes and other moving components. This lubrication will help reduce friction and allow the brake shoes to move freely, ensuring they release correctly when the brake pedal is released.

5. Check for Rust and Debris

Rust can build up inside the drum and on the brake shoes, preventing them from releasing. Inspect the drum’s interior and the shoes for any signs of rust or foreign particles. If you find rust, use a wire brush or sandpaper to gently clean the surfaces. Ensure that all debris is removed to promote smooth operation.

6. Test the Brake System

After making adjustments and cleaning, reassemble any components you may have disassembled. Reconnect the battery and perform a test drive in a safe, enclosed area. Gently apply the brakes to ensure they engage, then release to check that they come off smoothly. Listen for any unusual sounds, which may indicate further issues that need addressing.

7. Seek Professional Help

If you’ve followed these steps and continue to experience problems with your rear drum brakes not releasing, it may be time to consult a professional mechanic. Brake systems are critical for vehicle safety, and sometimes issues can stem from deeper mechanical failures that require expert diagnostics and repairs.

Conclusion

Releasing rear drum brakes may seem daunting, but with the right tools and a systematic approach, it can be accomplished safely and effectively. Regular maintenance and inspection of your vehicle's braking system will not only prolong the life of the brakes but also ensure the safety of you and your passengers on the road. Always prioritize safety, and do not hesitate to seek professional assistance when needed.