Drum brakes operate by using friction-lined brake shoes inside the brake drum to slow a vehicle down, in contrast to disc brakes that clamp brake pads onto a rotor. These brakes have been around for decades and continue to be reliable for certain applications.
The mechanism involves brake shoes lined with friction material that presses against the inside of the drum when the brakes are applied. Small pistons push these shoes outward to create the necessary resistance. Although modern cars mostly use disc brakes due to their superior performance, drum brakes still hold their ground in terms of durability and cost-effectiveness.
One key advantage of drum brakes is that they can double as the parking brake, something disc brakes often lack. Additionally, they tend to last longer and are cheaper to manufacture compared to disc brakes. However, disc brakes excel in heat dissipation and provide stronger braking power under demanding conditions.
Here are some important points to keep in mind:
- Drum brakes are commonly found on the rear axle, whereas disc brakes are standard on both the front and rear.
- Drum brakes offer a longer service life but can be harder to maintain.
- Drum brakes are more economical to produce and repair.
If you're considering replacing your drum brakes, here are some steps to follow:
1. **Safety First**: Before starting, wear protective gear and ensure proper ventilation. Use jack stands to elevate the vehicle safely.
2. **Remove the Drum**: Start by taking off the wheel cover and loosening the lug nuts. Remove the drum itself, being mindful of any retaining screws or clips.
3. **Inspect the Components**: Once the drum is off, examine the brake shoes, springs, and wheel cylinder. Look for signs of wear, cracks, or corrosion.
4. **Replace Worn Parts**: If the brake shoes are worn beyond 1/16 inch, replace them. Check the drum for grooves or damage as well.
5. **Install the New Drum**: After cleaning all parts thoroughly, reinstall the new drum, making sure everything aligns correctly. Adjust the shoes if needed.
6. **Reattach the Wheel**: Finally, put the wheel back on and tighten the lug nuts securely.
Signs that your drum brakes might need replacement include unusual noises during braking, difficulty engaging the parking brake, increased stopping distance, and vibrations felt through the pedal.
For those seeking professional assistance, NuBrakes offers convenient services where you can schedule appointments online and leave the maintenance to experts. Their team ensures your vehicle is road-ready after the repairs.
Remember, regular checks and timely replacements are crucial for maintaining optimal braking performance and ensuring your safety on the road. For further reading, check out resources like MechanicBase or AutoZone for detailed guides and troubleshooting tips.
[References: https://mechanicbase.com/brakes/bad-brake-drums-symptoms/, https://www.autozone.com/diy/brakes/how-to-change-drum-brakes]
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