Steps to Change Brake Cylinder on Drum Brake System

How to Replace the Brake Cylinder on Drum Brakes

Brake systems are crucial for vehicle safety, and maintaining them is essential for optimal performance. One of the key components in a drum brake system is the brake cylinder, often referred to as the wheel cylinder. If you notice signs of malfunction, such as leaking brake fluid, reduced braking efficiency, or uneven brake wear, it might be time to replace the brake cylinder. This article will guide you through the process of replacing the brake cylinder on drum brakes.

Tools and Materials Needed

Before starting the replacement, gather the following tools and materials

- Socket set - Wrenches - Screwdrivers - Brake cleaner - New wheel cylinder - Brake fluid - Clean cloths - Jack and jack stands - Safety goggles and gloves

Step-by-Step Guide

1. Safety First Begin by ensuring your vehicle is parked on a flat surface. Turn on your hazard lights and set the parking brake. Wearing safety goggles and gloves is recommended to protect against debris and chemicals.

2. Remove the Wheel Loosen the lug nuts on the wheel corresponding to the brake cylinder you will be replacing. Use a jack to lift the vehicle and secure it with jack stands. Once the vehicle is safely elevated, remove the lug nuts and take off the wheel.

3. Inspect the Brake Assembly With the wheel removed, inspect the brake drum assembly. Look for any signs of wear, damage, or fluid leaks. Take note of how the brake shoes are positioned, as this will aid in reassembly.

4. Remove the Brake Drum Depending on the model, the brake drum may be secured with retaining screws or simply held in place by friction. If there are screws, remove them using a suitable screwdriver. You may need to tap the drum gently with a hammer to loosen it before pulling it off.

5. Disconnect the Brake Cylinder Before removing the wheel cylinder, place a clean cloth beneath it to catch any leaking brake fluid. Using a wrench, disconnect the brake lines from the wheel cylinder. Be cautious, as brake fluid can damage paint and other surfaces.

6. Remove the Old Wheel Cylinder Unscrew the bolts securing the wheel cylinder to the backing plate and remove it. Take note of how the old cylinder is positioned and connected, as this information will be helpful for installation.

7. Install the New Wheel Cylinder Position the new brake cylinder in place and secure it with the bolts. Ensure it’s tightened to the manufacturer’s specifications. Reconnect the brake lines to the new cylinder, taking care not to overtighten, as this can damage the new component.

8. Reassemble the Brake Drum Once the new cylinder is installed, reposition the brake shoes if they were disturbed during the process. Replace the drum, ensuring it fits snugly over the shoes. Reattach any screws if necessary.

9. Reinstall the Wheel Place the wheel back onto the hub and hand-tighten the lug nuts. Lower the vehicle from the jack stands and then tighten the lug nuts in a star pattern to ensure even pressure.

10. Bleed the Brake System After installation, it’s essential to bleed the brake system to remove any air that may have entered during the process. This is typically done by having an assistant pump the brake pedal while you open and close the bleed valve on the wheel cylinder.

11. Test Drive Finally, take your vehicle for a test drive to ensure everything is functioning correctly. Pay attention to the brakes' response; they should feel firm and effective.

Conclusion

Replacing the brake cylinder on drum brakes is a manageable task for those with basic automotive knowledge and the appropriate tools. Regular maintenance and timely repairs can greatly enhance your vehicle's safety and performance. If you’re ever in doubt, consult a professional mechanic to ensure your brake system is functioning optimally.