how to check drum brakes for wear

How to Check Drum Brakes for Wear

Drum brakes play a crucial role in the overall safety and performance of a vehicle. Unlike disc brakes, drum brakes consist of a brake drum that houses brake shoes. When the brake pedal is pressed, the shoes are forced against the drum, creating the friction needed to slow the vehicle down. Over time, the brake shoes and drums wear out, making it essential for vehicle owners to regularly check their drum brakes for wear and tear. This article will guide you through the process of checking your drum brakes effectively.

Step 1 Gather Necessary Tools

Before you start inspecting your drum brakes, you'll need a few tools

- Jack and jack stands - Lug wrench - Brake cleaner - Rags or shop towels - A flashlight - A brake shoe gauge or caliper (optional)

Ensure that you park your vehicle on a flat surface and engage the parking brake before beginning the work.

Step 2 Raise the Vehicle

Once your tools are ready, use the lug wrench to loosen the lug nuts on the rear wheels slightly. Then, use the jack to lift the vehicle off the ground, placing it securely on jack stands. This step is crucial for safety and allows you to access the drum brakes.

After the vehicle is securely raised, remove the lug nuts completely and take off the wheel. This will give you direct access to the drum brakes. Inspect the brake drum by looking for any visible damage or discoloration.

Step 4 Inspect the Brake Drum

Look closely at the brake drum's inner surface. It should be smooth and free of deep grooves or ridges. If you notice any significant wear, it may be time to replace the drum. Use the flashlight to check for rust or cracks, which can also indicate that the drum is worn out.

Step 5 Check Brake Shoes

Next, locate the brake shoes inside the drum. Use the brake cleaner to spray the shoes lightly, helping remove dust and debris. Once cleaned, inspect the shoes for wear patterns. Brake shoes generally have a lining that wears down over time. Measure the thickness of the lining; ideally, it should be at least 1/4 inch thick. If it's significantly less than that, it indicates that they're worn and may need to be replaced.

Step 6 Look for Uneven Wear

While inspecting the brake shoes, pay attention to how evenly they are worn. Uneven wear can be a sign of other issues, like a misaligned drum or issues within the hydraulic system. If you notice uneven wear, it’s important to have your brakes inspected by a professional mechanic to diagnose the underlying problem.

Step 7 Examine Other Components

While checking the brake shoes and drums, take a moment to look at other components like the springs, hold-downs, and adjusters. Ensure that they are not corroded or damaged. Faulty hardware can lead to poor braking performance and should be replaced as necessary.

Step 8 Reassemble Everything

Once you’ve completed your inspection and determined that the brake components are in good condition (or made note of what needs replacement), reassemble the drum and wheel. Carefully place the wheel back on and hand-tighten the lug nuts. Lower the vehicle off the jack stands and tighten the lug nuts to the manufacturer’s torque specifications.

Step 9 Test Drive

After the inspection and any necessary repairs, take the vehicle for a short test drive to ensure that the brakes are functioning smoothly. Listen for any unusual noises and feel for any vibrations or pulling to one side when braking.

Conclusion

Regularly checking your drum brakes for wear is vital for maintaining vehicle safety and performance. By following these steps, you can identify potential issues before they become serious problems. If you are ever in doubt, it is best to consult with a professional mechanic who can provide expert advice and service. Proper maintenance and timely inspections will keep your brakes in top condition and ensure a safe driving experience.