how to bleed back drum brakes

How to Bleed Back Drum Brakes A Step-by-Step Guide

Bleeding back drum brakes is an essential maintenance task that ensures your braking system functions optimally. When air enters the brake lines, it can lead to a spongy brake pedal and reduced braking power. This guide will walk you through the process of bleeding back drum brakes effectively.

Tools and Materials Required

1. Brake fluid 2. Brake bleeder wrench or socket 3. Clear plastic tubing (optional) 4. A helper (if available) 5. Jack and jack stands 6. Wheel chocks

Step 1 Prepare the Vehicle

Before starting, ensure the vehicle is parked on a level surface. Use wheel chocks to secure the wheels. Loosen the lug nuts on the rear wheels slightly, but do not remove them yet. Raise the vehicle with a jack and secure it with jack stands, then remove the rear wheels to access the drums.

Step 2 Locate the Bleeder Valve

Identify the bleeder valve on each drum brake assembly. The valve is usually located near the top of the brake cylinder. It is typically a small metal nipple that you can loosen with a brake bleeder wrench.

Step 3 Check and Fill Brake Fluid

Open the hood and check the brake fluid reservoir. Ensure it has a sufficient amount of brake fluid (use the recommended type specified in your owner’s manual). Always top it off as you work, as letting it run dry can introduce more air into the system.

Step 4 Start Bleeding the Brakes

If you have a helper, have them sit in the driver’s seat. The process usually involves the following steps

1. Have your helper pump the brake pedal several times and hold it down. 2. With the bleeder valve closed, open the valve slowly to release any air and fluid. 3. Close the bleeder valve before your helper releases the brake pedal. 4. Repeat this process until no more air bubbles are present in the fluid. A steady stream of clear brake fluid indicates that the air is gone.

Step 5 Check Brake Functionality

Once both drum brakes are bled, reassemble everything, lower the vehicle, and check the brake pedal’s firmness. Take the car for a short test drive to ensure the brakes are functioning correctly.

In conclusion, bleeding back drum brakes is a straightforward procedure that, when done correctly, enhances your vehicle’s safety and performance. Always remember to follow safety precautions and consult your vehicle's manual for specific instructions related to your model.