Wet Line Kit for Semi Installations: Considerations for 2 or 3-Line Kits

When it comes to wet line kits for semis, there’s often a decision to be made: Should you go for a 2-line or 3-line wet kit? In this blog, we will explore the key differences between 2-line and 3-line wet kits, their respective benefits, and the scenarios in which each is best suited. Understanding these differences is essential for decision-makers in the trucking industry who are tasked with outfitting their fleets for maximum performance and safety.

Wet Line Kits for Semis: What Are They Anyway?

Before diving into the differences between 2-line and 3-line kits, it’s essential to understand the function of a wet line kit. In simple terms, a wet kit is a hydraulic system installed on a semi-truck. It includes a PTO (Power Take-Off) that connects to the truck’s transmission, a hydraulic pump, and hydraulic lines that drive specific attachments like a dump trailer, tanker, or heavy machinery.

The wet kit provides power to equipment that would otherwise be immobile. Without the appropriate hydraulic system, trucks can’t perform essential tasks like raising a dump bed, operating a hydraulic winch, or running the unloading mechanisms in tankers. The type of wet kit chosen depends on the specific applications the truck will be used for.

2-Line Wet Kits: Purpose and Benefits

A 2-line wet kit operates on a basic hydraulic system, consisting of two hydraulic lines: a pressure line and a return line. The pressure line pumps hydraulic fluid to the equipment, such as a dump trailer or a walking floor. Once the task is complete, the return line brings the fluid back to the hydraulic tank, ready to be used again.

Ideal Applications

2-line wet kits are most commonly used for dump trucks and simple hydraulic applications, like end dumps or dump trailers. Their design is straightforward, making them easier to maintain and less expensive to install. For tasks that don’t require continuous hydraulic power, a 2-line system is an efficient and effective solution. Common use cases include:

Dump trucks
Dump trailers
Moving floor trailers
Simple hydraulic applications

Key Benefits

Lower Cost: A 2-line wet kit is more affordable for installation and maintenance. Fewer parts and lines mean fewer chances of wear and tear, reducing long-term maintenance costs.
Simplicity: A 2-line wet kit is easy to operate because of its straightforward design. This simplicity reduces the need for extensive operator training.
Smaller Hydraulic Reservoir: Since the system uses only two lines, it typically requires a smaller hydraulic reservoir, saving space and weight.

3-Line Wet Kits: A Big Step Up

A 3-line wet kit is more complex, as it includes three hydraulic lines: a pressure line, a return line, and an additional “third” line, often called a case drain. The third line handles excess hydraulic fluid that may be produced during certain operations, ensuring that the system stays at the proper pressure levels and that the pump does not become overworked or overheated. The third line allows for continuous hydraulic operation without the risk of overheating, making it well-suited for more demanding applications.

Applications

These kits are a staple in liquid tanker trailers, lowboys, and other trucks where continuous, efficient hydraulic power is essential.

Tanker trailers (liquid or dry bulk)
Heavy machinery transport (lowboys)
Equipment requiring continuous hydraulic operation
Walking floor trailers with higher demands

Benefits

Continuous Operation: One of the biggest advantages of a 3-line wet kit is its ability to support continuous operation. The third line prevents the system from overheating, allowing it to run for extended periods without interruption.
Reduced Risk of Overheating: The third line helps dissipate excess heat generated by the hydraulic fluid, making it ideal for long or heavy-duty tasks. This increased cooling capacity protects the hydraulic pump and other system components.
Greater Flexibility: With the added case drain, 3-line systems offer more flexibility in the types of equipment they can power. They are designed for high-demand tasks and can accommodate a broader range of hydraulic tools and equipment.

Not sure if a 2-line or 3-line wet kit works for your fleet’s vehicles? Be sure to check out this helpful article that identifies heavy truck wet kits in depth.

Selecting Wet Kits

Key Differences Between 2-Line and 3-Line Wet Kits

Before you decide on your wet line kit for semi installation, be sure to understand these differentiators:

Hydraulic System Complexity

While 2-line kits are simpler and easier to install, 3-line kits offer more robust performance for complex and continuous hydraulic tasks. Depending on the demands of your operation, this complexity may either be an asset or an unnecessary complication.

Equipment Compatibility

A 2-line wet kit is sufficient for simpler applications like dump trailers or walking floors. However, if you’re running a liquid tanker or lowboy that requires continuous hydraulic power, a 3-line kit is necessary to avoid overheating and potential system failure.

Maintenance and Costs

While 3-line wet kits offer greater performance and flexibility, they also come with increased costs. The initial installation cost is higher due to the additional components, and ongoing maintenance may be more expensive. A 2-line wet kit, by comparison, is less expensive and requires less frequent maintenance due to its simpler design.

Choosing the Right Wet Line Kit for Semi Installation

Ultimately, the choice between a 2-line and 3-line wet kit depends on the specific needs of your operation. Consider the following factors:

Type of Equipment: Are you running a tanker, lowboy, or dump trailer? The type of equipment you operate will largely determine the kind of wet kit you need.
Frequency of Use: How often will the hydraulic system be used? A 3-line system is essential if you require continuous hydraulic power.
Budget: While 3-line kits offer enhanced performance, they come at a higher cost. If your operations don’t require continuous hydraulic power, a 2-line kit may be more budget-friendly.
Maintenance and Durability: Consider the long-term maintenance costs of each system. A more complex 3-line kit may require more maintenance but offers better protection against overheating and equipment failure.

Install a 2 or 3-Line Wet Kit for Your Fleet With the Experts at White Tank Today

Our team at White Tank specializes in installing 2 or 3-line wet kits tailored to your fleet’s needs. We ensure quick installation and can handle any other type of wet kit install you require. Work with us to equip your trucks with the right hydraulic system for maximum performance. Reach out today!