Drum Brake Cylinder Replacement Guide - Step-by-Step Instructions & Tips

How to Replace a Drum Brake Cylinder A Step-by-Step Guide

Drum brakes are widely used in many vehicles due to their reliability and effectiveness. However, like all mechanical components, they are subject to wear and tear over time. One common issue that may arise with drum brakes is the failure of the brake cylinder. When this happens, it can lead to decreased braking performance and potential safety hazards. Replacing a drum brake cylinder may seem daunting, but with the right tools and a bit of know-how, it can be accomplished successfully. This article will guide you through the process of replacing a drum brake cylinder step by step.

Tools and Materials Needed

Before starting the replacement, gather the necessary tools and materials - Adjustable wrench or socket set - Screwdrivers (flat-head and Phillips) - Brake cleaner - New brake cylinder - New brake fluid - Bungee cord or rope - Shop towels - Safety glasses and gloves

Step 1 Prepare the Vehicle

Ensure your vehicle is parked on a flat surface and the engine is off. Engage the parking brake and place wheel chocks behind the rear wheels. This will ensure the vehicle does not roll during the repair.

Step 2 Remove the Wheel

Using a lug wrench, loosen the lug nuts on the wheel that corresponds to the brake assembly you'll be working on. Once loosened, raise the vehicle using a jack and secure it with jack stands. Fully remove the lug nuts and take off the wheel to expose the drum brake assembly.

Step 3 Access the Brake Cylinder

Locate the brake drum. If there are any retaining screws, remove them. Gently pull the drum off. If it is stuck, you may need to tap it lightly with a mallet. Once the drum is removed, you can see the brake shoes and the wheel cylinder.

Step 4 Disconnect the Brake Lines

Before disconnecting the brake cylinder, use a bungee cord to hold the brake shoes up and out of the way. Carefully unscrew the brake lines attached to the cylinder using an adjustable wrench, taking care not to damage the lines.

Step 5 Remove the Old Brake Cylinder

The brake cylinder is typically held in place by two bolts. Use a socket set to remove these bolts and gently pull the cylinder out of the brake assembly. Make sure to collect any old washers or seals that may come loose.

Step 6 Install the New Brake Cylinder

Take your new brake cylinder and align it with the holes in the brake assembly. Secure it in place using the bolts you removed earlier. Ensure that all components are tightened according to the manufacturer's specifications.

Step 7 Reconnect Brake Lines

Attach the brake lines to the new cylinder, making sure to use new washers if necessary. Tighten the connections to avoid any leaks.

Step 8 Reassemble and Test

Carefully reassemble the drum and the wheel. Once everything is back in place, you can lower the vehicle back to the ground. Refill the brake fluid reservoir if it was low, and pump the brake pedal a few times to ensure proper pressure is restored.

Conclusion

Replacing a drum brake cylinder may take some time and effort, but it's a manageable task for those with basic mechanical skills. Regular maintenance of your brake system will ensure safer driving and extend the life of your vehicle. If you encounter any difficulties or are unsure at any point, don’t hesitate to consult a professional mechanic.