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 crucial maintenance task that can help ensure your vehicle’s braking system operates safely and efficiently. The wheel cylinder is responsible for pushing the brake shoes against the drum when you apply the brakes, and over time, it can wear out or leak. If you notice signs such as brake fluid leaks, diminished braking performance, or a spongy brake pedal, it may be time to replace the wheel cylinder. This guide will walk you through the steps of replacing a wheel cylinder.

Tools and Materials Needed

Before you start, gather the following tools and materials - Socket set - Wrench set - Brake cleaner - Brake fluid - New wheel cylinder (specific to your vehicle make and model) - Replacement brake shoes (optional, if worn) - Jack and jack stands - Safety glasses and gloves

Step 1 Safety First

Park your vehicle on a level surface and engage the parking brake. Wear safety glasses and gloves for protection. Loosen the lug nuts on the wheel where you will be working, but do not remove them yet.

Step 2 Lift the Vehicle

Using a jack, lift the vehicle from the appropriate lift points, then securely place jack stands to prevent any accidental drops. Remove the lug nuts and take off the wheel to access the drum brakes.

Step 3 Remove the Brake Drum

Once the wheel is off, inspect the brake components. If necessary, remove the retaining screws that hold the drum in place. Gently pull the drum off – it may require some wiggling if it’s stuck due to brake dust buildup. If it’s stubborn, use a brake drum puller.

Step 4 Inspect and Remove Old Components

With the brake drum removed, inspect the brake shoes and the wheel cylinder. If you notice significant wear on the shoes, it’s advisable to replace them as well. To remove the wheel cylinder, take note of how the brake shoes are positioned and remove the return springs and any clips securing the shoes. Disconnect the brake lines from the wheel cylinder using a line wrench to prevent damage.

Step 5 Install the New Wheel Cylinder

Position the new wheel cylinder in place where the old one was removed. Make sure the mounting holes align correctly. Reattach the brake lines, ensuring you do not overtighten to avoid damaging the cylinder or lines. Reinstall the brake shoes, ensuring they fit snugly against the new wheel cylinder.

Step 6 Reassemble Components

Once the new wheel cylinder is in place, reattach the return springs and any clips. Clean the brake drum with brake cleaner before reinstallation. Slide the drum back onto the hub and secure it with retaining screws if applicable.

Step 7 Reattach the Wheel

Put the wheel back onto the hub, hand-tightening the lug nuts before lowering the vehicle. Once it is back on the ground, use a torque wrench to tighten the lug nuts to the manufacturer's specifications.

Step 8 Test the Brakes

Before driving, make sure to pump the brake pedal a few times to seat the new parts and refill the brake fluid if necessary. Check for any leaks around the wheel cylinder. Take your vehicle for a short test drive to ensure everything is functioning correctly.

Conclusion

Replacing a wheel cylinder on drum brakes may seem challenging, but with careful attention to detail and the right tools, it can be done successfully. Regular maintenance of your braking system is essential for your safety and the longevity of your vehicle. If you encounter any complications during the process, don’t hesitate to seek professional assistance.