Steps to Replace Wheel Cylinder in Drum Brake System

How to Change Wheel Cylinder on Drum Brakes

Changing the wheel cylinder on drum brakes is an essential maintenance task that ensures your vehicle's braking system operates efficiently and safely. Understanding how to perform this task can save you time and money, and it's a great way to improve your mechanical skills. Here's a step-by-step guide on how to change the wheel cylinder on drum brakes.

Tools and Materials Needed

Before you start, gather the necessary tools and materials

- New wheel cylinder - Brake fluid - Brake cleaner - A wrench set - Flathead screwdriver - Phillips screwdriver - Pliers - Tire iron - Jack and jack stands

Safety First

Always prioritize safety when working on your vehicle. Park your car on a flat, stable surface and engage the parking brake. Wear safety glasses and gloves, and make sure your work area is well-ventilated.

Step 1 Remove the Tire

Using the tire iron, loosen the lug nuts but do not remove them completely. Lift the car using a jack and secure it on jack stands. Once the vehicle is secure, remove the lug nuts and take off the wheel to expose the drum brake assembly.

Step 2 Remove the Brake Drum

With the tire off, you'll need to access the brake drum. In some cases, the drum may be held in place by retaining screws. Remove these screws using a screwdriver. If the drum is stuck, you may need to tap it gently with a hammer to dislodge it. Carefully pull the drum off to reveal the brake components.

Step 3 Inspect the Brake Components

Before proceeding, take a moment to inspect the brake shoes, springs, and other components for wear or damage. If you notice significant wear on these parts, consider replacing them before reassembling.

Step 4 Locate the Wheel Cylinder

The wheel cylinder is located at the top of the brake assembly, attached to the backing plate. It's a cylindrical component with two brake line connections. Take a moment to familiarize yourself with its position and how it connects to the brake lines.

Step 5 Disconnect the Brake Lines

Using a wrench, carefully disconnect the brake lines from the wheel cylinder. Be prepared for some brake fluid to leak out – it's a good idea to have a container ready to catch any fluid. Ensure you do not allow dirt or debris to enter the brake lines.

Step 6 Remove the Old Wheel Cylinder

Unbolt the wheel cylinder from the backing plate using a wrench or socket set. Take note of how it is situated to assist with the installation of the new cylinder. Once removed, compare the old wheel cylinder to the new one to ensure they match.

Step 7 Install the New Wheel Cylinder

Position the new wheel cylinder in the same location as the old one and secure it using the bolts you removed earlier. Reconnect the brake lines, ensuring they are tight but not over-tightened, to prevent damage.

Step 8 Reassemble the Brake Components

After the new wheel cylinder is in place, reinstall the brake drum. Ensure it fits snugly over the brake shoes and other components. Replace any screws or clips you may have removed.

Step 9 Replace the Tire and Lower the Vehicle

Put the wheel back on the hub and hand-tighten the lug nuts. Lower the vehicle from the jack stands using the jack, then fully tighten the lug nuts in a crisscross pattern to ensure an even fit.

Step 10 Refill Brake Fluid and Test

Check the brake fluid reservoir and refill it as needed. Pump the brake pedal a few times to circulate the fluid. Finally, take the vehicle for a short test drive to ensure everything works correctly and listen for any unusual noises.

Changing a wheel cylinder on drum brakes may seem daunting, but with the right tools and careful attention, you can complete the task successfully. Regular maintenance of your braking system is crucial for your safety on the road.