how to assemble rear drum brakes

How to Assemble Rear Drum Brakes

Rear drum brakes are a crucial component of many vehicles, providing the necessary stopping power and safety. Whether you're a seasoned mechanic or a DIY enthusiast, understanding how to assemble rear drum brakes can save you both time and money. This guide will walk you through the step-by-step process of assembling rear drum brakes efficiently and safely.

Tools and Materials Needed

Before you start, ensure you have the following tools and materials - Drum brake assembly kit (including shoes, springs, and hardware) - Brake cleaner - Torque wrench - Screwdrivers (flathead and Phillips) - Pliers - Drum brake adjustment tool - Jack and jack stands - Safety glasses and gloves

Step 1 Prepare the Vehicle

Begin by ensuring your vehicle is parked on a level surface. Use the jack to lift the rear of the vehicle and secure it with jack stands. Remove the rear wheel to access the drum brakes.

Step 2 Remove the Brake Drum

If the brake drum is stuck, gently tap around the edges with a hammer to loosen it. Ensure you are wearing safety glasses, as debris may fly. Once loose, remove the drum by pulling it straight off the wheel hub.

Step 3 Take a Look Inside

Examine the existing brake components. Take note of how the brake shoes, springs, and adjuster are arranged. This will serve as a reference for reassembly. If the parts are worn or damaged, replace them as needed.

Begin by installing the new brake shoes. Locate the anchor pin and place the rear shoe onto the anchor. Some kits will have different sizes, so ensure you use the correct shoe for the rear position. Next, slide the front shoe into position and align it with the adjuster.

Step 5 Attach the Springs

Using the brake assembly kit, attach the primary and secondary return springs. The primary spring is typically longer and connects the top of the shoes. Use pliers for leverage when connecting the springs, ensuring they are secure and properly aligned. Be cautious as these springs can be under tension.

Step 6 Install the Adjuster

The adjuster mechanism (often a star wheel) should be installed next. This component allows for the maintenance of proper shoe-to-drum clearance. Ensure that the adjuster is properly positioned and functioning both manually and automatically.

Step 7 Connect the Hold-Down Springs

These springs hold the brake shoes in place. Insert the hold-down pins through the shoes and secure them with the hold-down springs. Make sure everything is firmly held to prevent movement during braking.

Step 8 Prepare the Brake Drum

Before reinstalling the drum, clean it thoroughly using brake cleaner. Inspect the inner surface for any scoring or damage. If the drum is severely worn, it may need to be resurfaced or replaced.

Step 9 Reinstall the Brake Drum

Carefully slide the brake drum back on over the new assembly. Ensure that it turns smoothly and does not rub against the brake shoes. If it feels tight, check that everything is aligned correctly, and make necessary adjustments.

Step 10 Adjusting the Brake Shoes

Using the brake adjustment tool, adjust the shoes until they just contact the drum but do not bind when the wheel is turned. This is crucial for ensuring optimal braking performance. Once you achieve the right tension, spin the drum to check for any resistance.

Step 11 Reassemble the Wheel

With the drum installed and adjusted, it’s time to reattach the wheel. Position the wheel back on, hand-tighten the lug nuts, and lower the vehicle from the jack stands. Once on the ground, use a torque wrench to ensure the lug nuts are tightened to the manufacturer’s specifications.

Final Inspection

Before taking your vehicle for a test drive, ensure everything is reattached correctly, and there are no unusual noises. A final inspection of the brake system is essential to confirm that the assembly was successful.

Conclusion

Assembling rear drum brakes can seem daunting, but with the right tools and guidance, it’s a manageable task. Regular maintenance of your brake system is crucial for your vehicle’s performance and safety. Remember, if you ever feel unsure about any part of this process, don’t hesitate to consult a professional. Safe driving!