Rebuilding a 14% Bolt Drum Brake for Optimal Performance and Longevity

Rebuilding a 14% Bolt Drum Brake A Step-by-Step Guide

Rebuilding a drum brake can seem like a daunting task, but with the right tools and a little bit of patience, it can be a rewarding DIY project. If you're working with a 14% bolt drum brake, this guide will walk you through the process step by step, ensuring your brake system performs safely and efficiently.

Understanding the Components

Before diving into the rebuild, it’s important to familiarize yourself with the key components of a drum brake system. The main parts include

- Brake Drum The cylindrical component that houses the brake shoes and is connected to the wheel. - Brake Shoes Curved components that press against the inner surface of the drum to create friction and stop the vehicle. - Wheel Cylinder The hydraulic component that pushes the brake shoes outward against the drum when the brake is applied. - Return Springs Springs that pull the brake shoes back into place once the brake pedal is released.

Tools and Materials Needed

To successfully rebuild your 14% bolt drum brake, gather the following tools and materials

Step-by-Step Rebuild Process

1. Preparation Start by parking the vehicle on a flat surface and engaging the parking brake for safety. Wear safety glasses and gloves throughout the process.

2. Remove the Wheel Loosen the lug nuts slightly before lifting the vehicle. Once it is safely elevated using jack stands, remove the lug nuts and take off the wheel.

3. Remove the Brake Drum Check for any retaining screws or clips holding the drum in place. If necessary, tap the drum gently with a hammer to loosen it. Once removed, inspect the drum for any wear or scoring.

4. Inspect Components Check the brake shoes for wear and the wheel cylinder for leaks. If the shoes are less than 1/4 inch thick, or if you notice fluid leaking from the cylinder, consider replacing them.

5. Remove Old Brake Shoes Use the spring tool to carefully remove the return springs. Then, detach the brake shoes from the backing plate by removing the retaining clips and any additional hardware. Make note of how everything is assembled—you’ll need to replicate this during reinstallation.

6. Install New Brake Shoes Apply brake grease to the contact points on the new brake shoes. Install the new shoes by reversing the removal process and securing them with the retaining clips.

7. Replace the Wheel Cylinder If you are replacing the wheel cylinder, remove the old one and install the new one. Be sure to connect the brake lines securely and use a torque wrench to tighten them according to the manufacturer’s specifications.

8. Reassemble the Brake System Reattach the return springs and ensure everything is tightened and secure. Double-check that all components are in place and properly aligned.

9. Reinstall the Brake Drum Slide the brake drum back onto the hub. It should fit snugly without excessive force. If it doesn’t, double-check that the shoes are adjusted correctly.

10. Reattach the Wheel Put the wheel back on and hand-tighten the lug nuts. Lower the vehicle and then use a torque wrench to tighten the lug nuts to the manufacturer’s recommended specifications.

11. Test the Brakes Before taking the vehicle for a drive, pump the brake pedal several times to ensure the system is properly engaged. This helps the brake shoes to adjust against the drum.

12. Final Checks Confirm that there are no leaks from the wheel cylinder and that everything is functioning smoothly.

Conclusion

Rebuilding your 14% bolt drum brake is not only a practical skill but also a way to save on repair costs. By following these steps carefully and methodically, you’ll ensure a safer braking system for your vehicle. Always remember to prioritize safety—if you’re ever in doubt about any step in the process, consult with a professional mechanic. Happy rebuilding!