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What Kind of Maintenance Do Semi-Trailers Require?

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Every semi-trailer owner knows that proper maintenance of these behemoths is essential for road safety and ensuring the longevity of the trailer. From the tires to the brakes, each part of the semi-trailer plays a crucial role in its overall functionality. This guide will provide what kind of maintenance do semi-trailers to keep it in tip-top shape.

Understanding the Basics of Semi-Trailer Maintenance

When it comes to maintaining semi-trailers, it’s essential to understand the basic requirements. This ensures that your trailer remains in excellent condition, whether you’re using it for transportation or storage.

The Importance of an Annual FHWA

All semi-trailers need an annual Federal Highway Administration (FHWA) inspection. This inspection is crucial to ensure that trailers adhere to safety standards and are fit for the road. Without this inspection, you run the risk of having a non-compliant trailer, which can lead to potential legal consequences and safety hazards.

Tire Maintenance

A common point of concern for semi-trailer owners is the condition of their tires. To ensure safety and optimal performance, it’s critical to check that your trailer tires have more than 4/30 seconds of tread. Consistent tread depth means better traction on the road, especially in challenging weather conditions.

Brake and Light Functionality

Brakes are arguably the most critical safety feature of any vehicle, semi-trailers included. Regular maintenance ensures they function optimally. Equally important is the condition and functionality of all trailer lights. Properly functioning lights are not just a legal requirement, but they also provide essential communication to other road users about your trailer’s movements.

Maintenance for Different Uses of Semi-Trailers

Semi-trailers have diverse uses, and their maintenance requirements might differ based on their primary purpose.

Storage Trailers

While some might believe that storage trailers don’t require as rigorous maintenance since they’re not constantly on the move, this is a misconception. Even when used predominantly for storage, it’s crucial to ensure they maintain a DOT certification.

This certification confirms that, if needed, these trailers are safe for traveling down the highway, ensuring they’re always ready for transportation purposes without needing extensive rework.

Refrigerated Units

For those who own or operate refrigerated units, maintenance is of utmost importance. The critical nature of the goods these trailers transport, often perishable items, means that any downtime or malfunction can lead to significant losses.

Furthermore, the good news for customers is that maintenance on refrigerated units is often offered for free. This not only ensures that the units are always in optimal condition but also helps build trust and rapport between the service provider and the customer.

DOT Certification – Why It Matters

The Department of Transportation (DOT) certification is a testament to the roadworthiness of a semi-trailer. This certification is a comprehensive checklist that ensures every aspect of the trailer, from its brakes to its lights, meets the required standards. It’s not just a rubber stamp but an assurance that the trailer is safe for both its cargo and other road users.


Proper maintenance of semi-trailers is non-negotiable. Not only does it ensure the safety of the cargo, driver, and other road users, but it also prolongs the lifespan of the trailer, ensuring you get the best value for your investment. Remember to always prioritize annual inspections, maintain your tires, brakes, lights, and always keep the DOT certification updated.

If you have any questions or need professional assistance with your trailer maintenance, don’t hesitate to contact us. We’re here to help ensure your semi-trailer serves you effectively and safely for years to come.

What Kind of Maintenance Do Semi-Trailers Require?

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