What is Rear Brake Drum and Why Do We Use Them?

Answer: Drum brakes are responsible for stopping your vehicle. Drum brakes are usually located on rear wheels because of the need for a parking brake. Parking brakes are added much easier to a drum brake than to a disc brake. Drum brakes contain several different parts: brake shoes, which are used to press against the brake drum and create the necessary friction to stop your vehicle; a backing plate, which basically holds everything together and is attached to the axle; brake drum, which is attached to the wheel; wheel or brake cylinder, which contains the pistons; return springs; and a self-adjusting system that will adjust the position of the brake pad when the brake isn’t applied. When the brakes are applied, brake fluid forces the pistons to push against the brake shoes, which press against the drum, which will stop the wheel and vehicle. Then, when the brake is released, the return springs send the brake shoes back to their original position. Brake shoes are located very close to the drum so that when you step on your brake pedal, the brakes are immediately applied. Over time, the surface of the brake shoes wears and the position of the shoes must be adjusted so it doesn’t have to travel a farther distance to come into contact with the drum. If the drum brakes didn’t have a self-adjusting system, you would have to press down farther and harder on your brake pedal before the brakes would be applied.

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When you press the brake pedal, your car slows down or stops. But have you ever wondered how that actually happens? Understanding the mechanics behind your car’s brakes can help you appreciate their importance and ensure they stay in good shape.

For many vehicles, especially older models or those with rear brakes, the answer lies in drum brakes. What are they, and how do they work? This guide answers these questions, including the pros and cons of drum brakes on a car, and shows how to maintain them.

What Drum Brakes Are

Drum brakes are a type of braking system where a drum-shaped component rotates with the wheels. There are brake shoes inside drum brakes, which press against the inner surface of the drum to create friction and slow down the car. Unlike disc brakes, which you might find in modern cars, drum brakes have a more enclosed design.

Historically, drum brakes have been the standard in vehicles for decades. Disc brakes have since replaced them on many modern cars, but drum brakes are still common in rear-wheel applications. Why? They’re cost-effective and reliable for certain uses, such as parking brakes.

How Do Drum Brakes Work?

Drum brakes may sound complicated, but their operation is fairly straightforward. Here’s how they work:

1. Brake Pedal Pressed: When you step on the brake pedal, hydraulic fluid flows through the brake lines.
2. Wheel Cylinder Activated: This fluid forces the wheel cylinder inside the drum to push brake shoes outward.
3. Friction Created: The brake shoes press against the rotating drum, creating friction and slowing the wheel.
4. Springs Return Shoes: Once you release the brake pedal, springs pull the brake shoes back into place, ready for the next stop.

Each component in this system, the drum, shoes, wheel cylinder, and springs, works together to keep your vehicle under control. While they may not look as sleek as disc brakes, drum brakes are efficient and get the job done.

Advantages and Disadvantages of Drum Brakes

Like anything, drum brakes come with their pros and cons. Let’s break them down.

Advantages

● They’re Cost-Effective: Drum brakes generally cost less to produce and replace, and this makes them a budget-friendly option.
● They’re Durable: They’re better suited for parking brakes because they can hold a vehicle in place more effectively.
● Have Enclosed Design: The enclosed structure protects components from dirt and debris, especially in off-road or harsh conditions.

Disadvantages

● Heat Dissipation: Drum brakes don’t handle heat as well as disc brakes, which can cause them to fade during prolonged use.
● Performance: They’re less effective in high-performance situations like rapid deceleration or racing.
● Complex Maintenance: Their design can make repairs trickier compared to disc brakes.

Maintenance Tips for Drum Brakes

Keeping your drum brakes in good condition is essential for your safety and your car’s performance. Here are some tips to ensure they’re always ready to perform:

1. Watch for Warning Signs

Listen for squeaking or grinding noises, which could mean worn brake shoes. Reduced braking performance or a spongy brake pedal can also indicate trouble.

2. Clean the Brake Drum

With time, dust and grime can accumulate inside the drum. Regular cleaning can prevent wear and tear.

For more information, please visit Rear Brake Drum.

3. Inspect Components

Check the brake shoes, springs, and wheel cylinder for any signs of damage or wear. Promptly replacing worn parts can save you money in the long run.

4. Schedule Regular Maintenance

Don’t wait until there’s a problem. You can catch issues early and keep your brakes reliable by arranging regular inspections by a professional.

When to Seek Professional Help

While you can do basic cleaning and inspections at home, you’d be better off leaving some tasks to the experts. Here’s when you should seek professional help:

● You hear persistent noises even after cleaning.
● Your brakes feel less responsive or spongy.
● You notice leaking brake fluid near the wheels.
● It’s been a long time since your last brake inspection.

Professional services ensure that repairs are done correctly and safely, giving you peace of mind on the road.

Summary

Drum brakes may not always steal the spotlight, but they are crucial to your car’s safety system. Understanding drum brakes, their operation, and maintenance can help you avoid expensive repairs and ensure safe driving. Key points to remember include:

● Drum brakes create friction to slow your car and are common in rear-wheel systems.
● They’re cost-effective and durable but require regular maintenance to perform well.
● Professional help is vital when repairs or inspections go beyond simple fixes.

Our skilled technicians at Oil Changers provide thorough brake checks and maintenance to 

ensure your safety. Whether it’s a quick check-up or a detailed repair, we’ve got you covered. Visit us today for reliable, hassle-free service.

FAQs

What are the drum brakes on a car?

Drum brakes are a type of braking system where brake shoes press against a rotating drum to create friction and slow the vehicle. They are commonly used in the rear wheels of cars.

How often should drum brakes be serviced?

Drum brakes should be inspected every 12,000 miles or annually, although the frequency may vary based on driving habits and conditions.

Can I replace drum brakes with disc brakes?

Of course, you can convert many vehicles from drum to disc brakes. Although, it’s a complex process that requires professional installation and can be costly.

Why do drum brakes make noise?

Noises can result from worn brake shoes, accumulated dirt inside the drum, or issues with springs or other components. You can identify the exact cause with the help of a professional.

Are drum brakes safe for modern driving?

Yes, drum brakes are safe and effective for most driving conditions, especially in everyday vehicles. However, disc brakes may perform better in high-performance or heavy-duty scenarios.