Installing a gooseneck adapter from the RV4 or RV4XL series can be a straightforward process when following a proven, step-by-step method. This guide walks through each step using official installation principles to ensure a safe and secure towing setup.
1. Prepare and Position the Adapter
Begin by removing any lube plate and thoroughly degreasing both the kingpin and the kingpin plate—this ensures a clean, secure fit. Next, align the large opening of the adapter box over the kingpin, ensuring the gooseneck coupler faces forward. Square it with the kingpin box and secure it firmly using vise clamps.
2. Clamp and Torque the King Pin
With the adapter clamped, position the King Pin Clamp so its four cup-point bolts face downward. Insert two ¾″ bolts through the side holes and snug them. After squaring the clamp, torque these bolts to 240 ft-lb. Then, alternately tighten the four cup-point set bolts around the clamp to 85 ft-lb.
3. Bolt or Weld the Adapter Securely
Securing the adapter to the kingpin plate is essential. For plates measuring 10″×10″ or larger and at least ¼″ thick, use the eight included ⅜″ bolts in the corner and center holes, torquing them to 28 ft-lb. If the box is sealed, drill and tap ⅜″-16 holes and torque to 20 ft-lb. For undersized or thinner plates, a stitch-weld is recommended when bolting isn’t feasible.
4. Install the Release Cable and Grease the Coupler
Attach the release cable to the coupler lever with a cable clamp. Route it through eyebolts to enable unlatching from outside the truck bed—typically near the trailer jack—without needing to climb in. Finally, apply a light coat of lithium grease inside the coupler to ensure smooth operation.
5. Attach Safety Chains and Final Checks
Install high-strength safety chains to a structural point on the trailer that matches the chain’s strength—avoid welding to the chain directly. Before towing, double-check all torque settings, verify that the adapter is square and secure, and inspect trailer swing clearance as detailed in the product manuals.
Why Use a Gooseneck Adapter?
A gooseneck adapter offers flexible towing options by allowing fifth-wheel trailers to be pulled with a gooseneck ball. Offset models like the RV4XL provide additional clearance between the trailer and cab, improving turning radius and load balance. Designed with safety and user-friendliness in mind, these adapters are suitable even for first-time users when installed correctly.
Who Makes This Process So Simple
For those looking for durable, easy-to-install towing equipment backed by real-world testing and expert guidance, PopUp Towing Products provides the trusted solution. From the RV4 to the RV4XL, their gooseneck adapter lineup reflects a commitment to strength, precision, and support.
Contact us today to find the right adapter for your setup and get expert help every step of the way.