When it comes to the trucking industry, brake maintenance is one of the most critical aspects that should not be overlooked. The brakes are the only thing that keeps a moving truck from colliding with other vehicles and pedestrians on the road. It’s a scary thought to think of a huge truck without brakes, but it happens more often than you would think.
That’s where the slack adjuster comes in. The slack adjuster is a vital component of the braking system that ensures proper braking function. However, despite its importance, slack adjusters are somewhat controversial in the industry. In this article, we will delve deeper into the meaning of slack adjusters, how they work, and why they are so essential for the trucking industry.
What Is The Purpose Of A Slack Adjuster?
A slack adjuster is a critical part of the braking system found in heavy-duty commercial vehicles such as 18-wheelers. Its main purpose is to maintain an appropriate gap, or “slack,” between the brake shoe and the drum or rotor. When you apply the brakes, the slack adjuster reacts by expanding the brake shoes toward the brake drum, increasing the braking force. When you release the brakes, the slack adjuster ensures that the brake shoes return to their default position.
Slack adjusters are designed to automatically adjust the braking system’s slack to ensure optimal braking performance. If a slack adjuster isn’t functioning correctly, it can cause brakes to fail, leading to accidents and fatalities. Unfortunately, many accidents on our roads are caused by poorly maintained brakes. As a result, the Federal Motor Carrier Safety Administration (FMCSA) has strict maintenance requirements for commercial vehicles, including slack adjusters.
What Are The Slack Adjusters CDL?
Commercial driver’s license (CDL) holders should be aware of slack adjusters because they are an essential component of their vehicles’ braking system. CDL drivers should know how slack adjusters work, how to check them, and how to adjust them. A slack adjuster that’s out of adjustment can cause brakes to fail, meaning a driver’s license could be at risk, not to mention the safety of all road users.
Where Are The Slack Adjusters On A Truck?
Slack adjusters are located on the rear axle in-between the brake shoes. Trucks with air brakes, slack adjusters can be found on the push rod connected to the brake chamber. The slack adjuster should sit perpendicular to the push rod. In addition, it’s vital to keep slack adjusters clean and free of debris, which could cause wear and tear.
Do All Semi Trucks Have Slack Adjusters?
All commercial trucks with air brakes should have slack adjusters. The FMCSA has rigid safety regulations that all commercial vehicles must adhere to, including slack adjusters. Semi-trailer trucks are heavy-duty vehicles that require advanced braking systems to support their weight and ensure the safety of the driver and other road users. Therefore, air brakes are the standard brakes for semi-trucks.
The Controversy Around Slack Adjusters In The Trucking Industry
While the purpose of slack adjusters in the trucking industry is undeniable, there remains a controversy around their use. The debate centers around manual slack adjusters versus automatic slack adjusters. Manual slack adjusters must be regularly adjusted because drivers can’t always know when the brake shoes have worn down, meaning their brakes may be inadequate or not performing as they should. Automatic slack adjusters, on the other hand, adjust themselves, depending on the distance between the brake drum and the brake shoe. However, critics claim that automatic slack adjusters may adjust incorrectly, causing brakes to fail.
“Many accidents occur because commercial drivers fail to follow basic safety procedures. Truckers must know how to check slack adjusters regularly, especially before setting out on long hauls. With regular inspection, drivers can prevent potential problems before they turn into an accident.” – John Stevens, Safety Inspector
Despite the debate, the FMCSA mandates that all heavy-duty commercial trucks with air brakes should have automatic slack adjusters. The reason for this is simple; it’s to ensure that all trucks meet the same standard of safety on the road. Automatic slack adjusters are designed to prevent brake failure that can put driver and public safety at risk.
Conclusion
Slack adjusters are a critical component of the braking system that should not be overlooked in the trucking industry. Truckers should know how to check and adjust slack adjusters manually, and regular inspections are crucial to ensure that brakes are functioning correctly. Automatic slack adjusters take the responsibility of adjustment away from drivers, making them more reliable because they will adjust themselves when the brake shoes wear down. Regardless of the type of slack adjuster, it’s essential to keep them clean and free of debris to ensure optimal performance. Remember, brakes save lives.