How to Plumb a Two-Line Wet Kit

A two-line wet kit is a hydraulic system commonly used for dump trailers and other applications requiring hydraulic power. Proper installation ensures efficient performance and prevents leaks or system failures. This guide provides step-by-step instructions on how to plumb a two-line wet kit correctly.

1. What Is a Two-Line Wet Kit?

✔ A hydraulic system with one pressure line and one return line. ✔ Used for dump trailers, walking floors, and lowboys. ✔ Runs off the truck’s PTO (Power Take-Off) and hydraulic pump.

2. Tools and Materials Needed

✔ Hydraulic pump (matched to application requirements). ✔ Hydraulic reservoir (tank). ✔ Pressure hose and return hose. ✔ Quick couplers or fittings. ✔ Inline hydraulic filter (for contamination prevention). ✔ Wrenches and hose clamps. ✔ Thread sealant (Teflon tape or pipe thread sealant).

3. Steps to Plumb a Two-Line Wet Kit

Step 1: Mount the Hydraulic Reservoir

✔ Secure the hydraulic reservoir to the truck’s frame. ✔ Ensure the tank is properly vented to avoid pressure buildup. ✔ Position it close to the hydraulic pump for efficient flow.

Step 2: Connect the Pressure Line

✔ Attach the pressure line from the hydraulic pump’s pressure port to the trailer’s hydraulic system. ✔ Use high-pressure-rated hoses to prevent failures. ✔ Install quick couplers for easy disconnection.

Step 3: Connect the Return Line

✔ Attach the return line from the trailer’s hydraulic system back to the hydraulic reservoir. ✔ Install an inline hydraulic filter in the return line to keep contaminants out. ✔ Ensure the return line is properly sized to avoid pressure restrictions.

Step 4: Install the PTO and Hydraulic Pump

✔ Mount the PTO unit to the truck’s transmission. ✔ Connect the hydraulic pump to the PTO. ✔ Verify proper alignment and secure all bolts. ✔ Fill the reservoir with hydraulic fluid suitable for the system.

Step 5: Test the System for Leaks

✔ Start the truck and engage the PTO. ✔ Operate the hydraulic system and check for leaks at fittings and connections. ✔ Tighten any loose connections and inspect for proper fluid flow.

4. Best Practices for Maintenance

✔ Regularly check hydraulic fluid levels and top off as needed. ✔ Replace hydraulic filters every 3-6 months or per manufacturer’s guidelines. ✔ Inspect hoses and fittings for leaks or wear. ✔ Keep the system free of dirt and debris to prevent contamination.

5. Final Thoughts

Properly plumbing a two-line wet kit ensures optimal hydraulic performance and system longevity. By following these steps, you can install and maintain a reliable hydraulic system for your truck and trailer setup.

Frequently Asked Questions (FAQs)

What’s the difference between a two-line and three-line wet kit?

✔ A two-line wet kit has a pressure and return line, while a three-line system adds a dedicated tank return for better cooling.

How often should I change hydraulic fluid?

✔ Typically every 1,000–2,000 hours of operation or as recommended by the manufacturer.

Can I use any hydraulic fluid for my wet kit?

✔ No, always use the recommended hydraulic fluid to ensure system compatibility and performance.

By following this guide, you can plumb a two-line wet kit correctly and ensure smooth hydraulic operation for your equipment.