how to replace a wheel cylinder on drum brakes

How to Replace a Wheel Cylinder on Drum Brakes

Replacing a wheel cylinder on drum brakes is a task that can be accomplished with some basic mechanical skills and a few tools. A malfunctioning wheel cylinder can lead to poor braking performance and potentially dangerous conditions, so it's important to address any issues promptly. Here’s a step-by-step guide to help you through the process.

Tools and Materials Needed

Before you begin, gather the following tools and materials

- Jack and jack stands - Wheel chocks - Lug wrench - Brake fluid - Brake cleaner - Replacement wheel cylinder - New brake shoes (if necessary) - Torque wrench - Socket set - Pliers - Bailing wire (optional) - Rubber gloves and safety glasses

Step 1 Prepare Your Vehicle

First, ensure your vehicle is parked on a flat surface. Engage the parking brake and place wheel chocks behind the rear wheels (if working on the front brakes) to prevent it from rolling. Use a lug wrench to loosen the lug nuts on the wheel where you will be working, but do not remove them completely yet.

Step 2 Lift the Vehicle

Using a jack, lift the vehicle and then place jack stands securely underneath. This provides safety while you work. Remove the lug nuts and take off the wheel to access the brake assembly.

Step 3 Remove the Brake Drum

Locate the retaining screws or clips holding the brake drum in place. Remove these screws or clips if applicable. If the drum is stuck due to rust or corrosion, tap it gently with a hammer to free it. Once loose, slide the drum off to reveal the brake shoes and wheel cylinder.

Step 4 Identify the Wheel Cylinder

With the drum removed, locate the wheel cylinder, which is typically positioned at the top of the brake assembly between the two brake shoes

. Inspect for any signs of leakage or damage, which are common indicators that the cylinder needs replacement.
how to replace a wheel cylinder on drum brakes

Step 5 Remove the Old Wheel Cylinder

Using a wrench, disconnect the brake lines attached to the wheel cylinder. Be prepared for some brake fluid to leak out; catch it using a container. Next, remove any retaining bolts that secure the wheel cylinder in place and carefully pull it out from the brake assembly.

Step 6 Install the New Wheel Cylinder

Position the new wheel cylinder where the old one was located. Secure it in place by tightening the retaining bolts. Reattach the brake lines, ensuring that they are snug but be cautious not to overtighten as this can damage the fittings.

Step 7 Reassemble the Brake Components

If your brake shoes show wear, now is a good time to replace them. Otherwise, reassemble the brake drum, ensuring everything is correctly aligned and the drum spins freely. Reattach the clips or screws that hold the drum in place.

Step 8 Replace the Wheel and Lower the Vehicle

Place the wheel back on and hand-tighten the lug nuts. Lower the vehicle from the jack stands and use the jack to lift it off the ground just enough to remove the stands. Tighten the lug nuts in a crisscross pattern to ensure an even fit.

Step 9 Test the Brakes

Before driving, pump the brake pedal several times to ensure the brake shoes adjust correctly and the brake fluid circulates properly. Check for any leaks around the new cylinder and brake lines.

Once everything looks good, take your vehicle for a short test drive to ensure the brakes function properly.

Replacing a wheel cylinder on drum brakes can seem daunting at first, but with careful attention to detail and safety precautions, you can complete the job successfully. Always remember to consult your vehicle’s manual for specific instructions and torque specifications. Happy repairing!