how to change drum brake cylinder

How to Change a Drum Brake Cylinder

Changing a drum brake cylinder is a key aspect of vehicle maintenance that can significantly enhance your vehicle's braking performance. If you are experiencing issues such as leaking brake fluid or reduced braking efficiency, it may be time to replace your drum brake cylinder. Follow these steps to ensure a smooth and safe replacement process.

Tools and Materials Needed

Before you begin, gather the necessary tools and materials - New drum brake cylinder - Brake fluid - Wrench set - Screwdrivers - Brake cleaner - Rubber gloves - Brake line wrench (optional)

Safety First

Always prioritize safety when working on your vehicle. Park your car on a flat surface, engage the parking brake, and use wheel chocks to prevent rolling. It’s advisable to wear safety glasses and gloves to protect yourself from brake dust and fluids.

Step 1 Remove the Wheel

Begin by loosening the wheel lug nuts with a tire iron. Once they are loosened, use a jack to lift the car and secure it with jack stands for stability. Remove the lug nuts completely and take off the wheel to expose the brake assembly.

Step 2 Inspect the Brake Assembly

With the wheel off, inspect the brake assembly for wear or damage. Look for signs of oil or brake fluid leaks around the cylinder, which may indicate a need for replacement. Take this opportunity to also check the condition of the brake shoes and drum.

Locate the drum brake cylinder, typically mounted on the rear of the brake assembly. Use the appropriate wrench to disconnect the brake lines leading to the cylinder. Be cautious, as some brake fluid may leak out during this process. Consider using a brake line wrench for a better grip and to avoid stripping the fittings.

Next, unscrew the mounting bolts that hold the cylinder in place. Carefully remove the old cylinder from the backing plate, making note of how it was positioned for reference when installing the new one.

Step 4 Install the New Brake Cylinder

Take your new drum brake cylinder and position it in the same orientation as the old one. Secure it in place by tightening the mounting bolts. Reconnect the brake lines, ensuring they are snug but not overly tight, which could lead to damage.

Step 5 Bleed the Brake System

Once the new cylinder is installed, it’s crucial to bleed the brake system to remove any air bubbles. Start at the wheel farthest from the master cylinder and work your way forward. Use a helper to pump the brake pedal while you open and close the bleed valve on each brake line.

Step 6 Reassemble and Test

Reattach the wheel and hand-tighten the lug nuts before lowering the vehicle. After removing the jack stands, lower the car completely and then tighten the lug nuts fully in a crisscross pattern for even distribution.

Finally, take the car for a test drive in a safe area to ensure that the brakes are functioning properly. Pay attention to the pedal feel and listen for any unusual noises.

Conclusion

Changing a drum brake cylinder is a straightforward process that can greatly improve your vehicle’s braking capabilities. By following these steps carefully and maintaining regular brake checks, you can ensure a safer driving experience. Remember, if you feel uncomfortable performing this task yourself, it’s always best to consult with a professional mechanic.