3 Trailer Repairs That You Might Not Expect

Trailers are built to take a beating, but even the toughest rigs need repairs from time to time. While most drivers expect issues with brakes, suspensions, or tires, some trailer-related repairs might catch you off guard. Below, we’ll dive into three key components that are often overlooked yet crucial for the efficient operation of many fleets: dry bulk blowers, liquid pumps, and landing gear.

1. Dry Bulk Blowers: The Power Behind Bulk Unloading

What Are Dry Bulk Blowers?

Mounted on the tractor, dry bulk blowers are essential for unloading dry bulk tankers—trailers that transport materials like cement, sand, flour, and plastic pellets. These blowers generate a high volume of air that forces dry materials out of the trailer’s hoppers and into the customer’s storage silo.

Common Issues and Repairs

To avoid unexpected downtime, regular inspections, lubrication, and airflow checks are crucial. Keeping an eye on hoses, connections, and pressure levels will help ensure your blower performs optimally.

• Overheating: Blowers generate significant heat, and without proper cooling or ventilation, they can overheat, leading to performance loss or even failure.
• Worn-out Seals and Bearings: Since blowers operate at high RPMs, their seals and bearings can degrade over time, leading to leaks and inefficiencies.
• Airflow Restrictions: Clogged filters, damaged hoses, or buildup inside the blower can restrict airflow, reducing its ability to properly discharge product.
• Excessive Vibration: If the blower is improperly mounted or out of balance, it can cause excessive vibration, leading to premature wear on components.

2. Liquid Pumps

What Are Liquid Pumps?

Ever notice those shiny tanker trailers rolling down the highway? Those trailers are transporting liquid bulk cargo, such as chemicals, latex, paint, or peroxide. Unlike dry bulk trailers that use blowers, liquid bulk tankers require liquid pumps to unload their contents safely and efficiently. These pumps are also mounted on the tractor and create suction to pull liquid from the tanker into a customer’s storage system.

Common Issues and Repairs

Routine inspection of seals, hoses, and filters can extend the life of a liquid pump. Flushing the system after each use, especially when handling caustic or thick liquids, prevents buildup and keeps the pump running smoothly.

• Seal Failures: Over time, seals can degrade due to exposure to corrosive chemicals, leading to leaks and pressure loss.
• Cavitation Damage: If air enters the pump system, it can cause cavitation, which results in bubbles forming and collapsing inside the pump, leading to internal damage.
• Pump Motor Failure: Electrical or mechanical issues can cause motor failure, preventing proper function.
• Clogged or Damaged Valves: If debris enters the pump system, it can clog valves, reducing efficiency or causing the system to seize up.

3. Landing Gear

What Is Landing Gear?

Every semi-trailer relies on landing gear to remain stable when detached from a tractor. These extendable legs support the trailer’s front end while it's parked or waiting for a new haul. Without functioning landing gear, loading and unloading operations can come to a halt.

Common Issues and Repairs

• Gearbox Failures: The crank mechanism that raises and lowers the landing gear can seize up due to a lack of lubrication or internal wear.
• Bent or Broken Legs: Rough terrain, improper use, or impact damage can bend the legs, making them difficult (or impossible) to extend or retract.
• Rust and Corrosion: Exposure to rain, road salt, and chemicals can corrode the metal, weakening structural integrity.
• Worn-Out Foot Pads: The landing gear’s foot pads distribute weight, and over time, they can wear down or crack, causing instability.

Preventative Maintenance

To maintain trailer components effectively, focus on key areas such as landing gear, liquid pumps, and dry bulk blowers. For the landing gear, regularly inspect for wear, ensure proper lubrication, and conduct operational checks for smooth functionality. Liquid pumps require daily leak checks, annual seal replacements, and consistent lubrication to prevent breakdowns and maintain efficiency. Similarly, dry bulk blowers should be inspected for damage, undergo vibration analysis to catch early signs of failure and have their air filters replaced regularly to ensure optimal performance.

Maintaining these components involves adhering to manufacturer guidelines, using recommended parts, and ensuring personnel are well-trained. Keep detailed records of all maintenance activities to facilitate timely upkeep and ensure trailer safety and reliability. This streamlined approach not only extends the life of the trailer but also enhances its overall performance.

Be Prepared for These Surprise Trailer Repairs

Unexpected trailer repairs can lead to costly downtime, but with proactive maintenance and routine inspections, many of these issues can be avoided. Whether it’s dry bulk blowers, liquid pumps, or landing gear, keeping these components in top shape ensures your fleet stays on the road and operates efficiently.

If you're dealing with blower, pump, or landing gear issues, Southeast Fleet Services has you covered. Our team specializes in installation, maintenance, and repairs to keep your fleet running smoothly across North Carolina, South Carolina, and Georgia. For more information, read our article on DOT inspections. Or contact us today to schedule a service appointment!