drum brakes sticking

Understanding Drum Brakes Sticking Causes and Solutions

Drum brakes are a common type of braking system found in many vehicles, especially older models and lighter vehicles. Though they are generally reliable and effective, issues can arise, particularly with brakes sticking. This phenomenon can lead to reduced braking performance and potential safety hazards on the road. In this article, we will explore the causes of drum brakes sticking, the symptoms to look out for, and the solutions available to address this issue.

What Are Drum Brakes?

Before delving into the sticking issue, it is important to understand how drum brakes work. A drum brake system consists of a circular drum that rotates with the wheel and a set of brake shoes that press against the inside of the drum to create friction. When the brake pedal is pressed, hydraulic pressure forces the brake shoes outward against the drum, slowing down or halting the wheel's rotation.

Causes of Drum Brakes Sticking

Several factors can contribute to drum brakes sticking. Here are some of the most common causes

1. Rust and Corrosion Over time, moisture can accumulate inside the drum, leading to rust and corrosion. This buildup can hinder the movement of the brake shoes, causing them to stick to the drum.

2. Worn Brake Shoes As brake shoes wear down, they can become unevenly shaped or too thin to function properly. This wear can cause the shoes to get trapped within the drum, leading to sticking.

3. Contaminated Brake Components Oil, grease, or brake fluid can leak onto the braking components, creating a slippery surface that impedes the proper functioning of the brake shoes and drums.

4. Faulty Hardware The various components that make up the drum brake system, such as springs, retainers, and adjusters, can wear out or break, resulting in improper alignment and function of the brake shoes. This misalignment can cause sticking and can lead to further safety issues.

5. Moisture Infiltration In areas with high humidity or where vehicles are frequently exposed to rain and snow, water can enter the drum. This can lead to rusting and deterioration of parts, which causes sticking.

6. Improper Adjustment Drum brakes require periodic adjustment to ensure they are functioning correctly. If they are not adjusted properly, the brake shoes may not retract fully when released, leading to continual contact with the drum and a sticking sensation.

Symptoms of Sticking Drum Brakes

Identifying the symptoms of sticking drum brakes early can prevent further damage and ensure safety. Look for the following signs

- Unusual Sounds A grinding or squeaking noise when applying the brakes can indicate that the brake shoes are sticking. - Increased Stopping Distance If you notice that your vehicle takes longer to stop, it may be a sign that the brakes are not functioning properly.

- Overheating If you feel heat radiating from one or more wheels after driving, it could be due to the brake shoes sticking against the drum.

- Pulling to One Side If the vehicle pulls to one side when braking, it could indicate that one of the drum brakes is sticking more than the other.

Solutions for Sticking Drum Brakes

To address the issue of sticking drum brakes, consider the following solutions

1. Inspection and Cleaning A thorough inspection of the brake components is essential. Cleaning rust and debris from the drum and the brake shoes can often resolve the sticking issue.

2. Replacing Worn Parts If any components, like the brake shoes or hardware, are worn out, replacing them can restore proper function to the drum brake system.

3. Adjusting Brake Shoes Ensuring that the brake shoes are properly adjusted will prevent sticking and ensure better performance overall.

4. Using High-Quality Brake Components Investing in quality parts can help minimize the risk of sticking due to inferior materials.

5. Regular Maintenance Routine inspections and maintenance can proactively identify issues before they escalate into bigger problems.

In conclusion, understanding the causes and symptoms of drum brakes sticking can help vehicle owners address problems early on, ensuring safe driving conditions. Regular maintenance and prompt attention to any issues that arise are key to keeping your drum brake system functioning smoothly.