adjusting rear drum brakes

Adjusting Rear Drum Brakes A Comprehensive Guide

When it comes to vehicle maintenance, ensuring that your brakes are functioning optimally is paramount for safety. Rear drum brakes, while not as common as disc brakes in modern vehicles, still play a significant role in many cars, especially older models and certain trucks. Adjusting the rear drum brakes is a vital practice that can enhance braking efficiency and prolong the lifespan of the braking system. This article will guide you through the adjustment process, the tools needed, and the importance of regular brake maintenance.

Understanding Rear Drum Brakes

Before we dive into the adjustment procedure, it’s essential to understand how rear drum brakes work. The basic principle involves a rotating drum attached to the wheel and brake shoes that press against the inner surface of the drum to create friction, thereby slowing down or stopping the vehicle. Over time, brake shoes wear down and the drum can become misaligned, leading to reduced braking efficiency. Therefore, regular adjustments are necessary to ensure that the brake shoes make appropriate contact with the drum.

Tools Needed for Adjustment

To adjust rear drum brakes, you will need a few basic tools 1. Jack and Jack Stands To safely elevate your vehicle. 2. Lug Wrench To remove the wheels. 3. Brake Adjusting Tool or screwdriver For adjusting the brake shoes. 4. Tape Measure To check the appropriate distances. 5. Grease To lubricate moving parts. 6. Safety Glasses Always protect your eyes when working on vehicles.

Step-by-Step Adjustment Procedure

1. Preparation Begin by parking your vehicle on a flat surface and engaging the parking brake. Turn off the engine and remove the keys.

2. Lifting the Vehicle Use the jack to lift the rear of the vehicle. Secure it with jack stands to prevent any accidents.

3. Removing the Wheel Using the lug wrench, remove the wheel to gain access to the drum.

4. Inspecting the Drum and Shoes Before making adjustments, inspect the brake drum and shoes for wear and damage. If the shoes are worn down close to the rivets, they should be replaced.

5. Adjusting the Brake Shoes Locate the star wheel adjuster, which can typically be found through an opening in the back of the brake assembly. - Using your brake adjusting tool or a screwdriver, turn the star wheel to expand the brake shoes outward. This will bring the shoes closer to the drum. - Adjust until you can barely slide a piece of paper between the shoe and the drum. The shoes should not make contact with the drum when the brakes are not applied.

6. Rolling the Drum After adjusting the shoes, manually rotate the brake drum to ensure it turns freely. If it’s too tight, back off the adjustment until the drum spins freely.

7. Reinstalling the Wheel Once adjustments are complete, reattach the wheel and tighten the lug nuts. Lower the vehicle and remove the jack stands.

8. Testing the Brakes After adjusting, pump the brake pedal a few times to set the shoes in position. Take the vehicle for a short test drive to ensure everything is functioning correctly.

Importance of Regular Adjustments

Adjusting rear drum brakes is not only crucial for safety but also helps in maintaining the overall efficiency of the braking system. Properly adjusted brakes can reduce brake wear, improve fuel efficiency, and enhance vehicle control, especially during emergency stops.

Furthermore, routine inspections and adjustments can prevent costly repairs down the line. Drivers should consider checking their rear drum brakes at least once a year or more frequently if the vehicle is used for heavy towing or in harsh conditions.

In conclusion, adjusting rear drum brakes may seem daunting at first, but with the right tools and knowledge, it can be a straightforward process. Regularly maintaining and adjusting your vehicle’s braking system will ensure a safer driving experience and extend the life of your brakes. Always prioritize safety, and when in doubt, consult with a professional mechanic.