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One problem I had when replacing the Andersen Ultimate adapter to the MorRyde pin shaft was that the MorRyde shaft was .03 " larger in diameter than the one on my Lippert pin box. The adapter just wouldn't fit up on the pin shaft.
Solved that problem by using my Moto - Tool with a stone wheel attached to grind the aluminum down to make it fit. Glad that block was made of aluminum!! If it had been steel I don't know what I would have done.....
Mine wouldn't go on initially, but can't remember what I did. I may have used fine sand paper on the pin to remove any rough spots. I did just replace my adapter with the new one that came with my AUH 3200 that replaced the rail mount model and it slipped on just fine so that supports sanding the pin. I may have contacted Andersen and did whatever they suggested which could have even been just placing the adapter where it would heat up.
I love the pin box and AUH combo. Rides so much smoother.
In case you don't know, the glide pads and rubber bolt covers are and need replacing occasionally. Also be prepared for the "paint" to flake off. I finally just flap disc and reshot it.
Also the rubber dampner is available in different grade levels, loosely based on weight. If you feel your trailer maxing out against the stops front and read you may need to go up one pad level.
The pin box is the best mood I did on our trailer, per the wife.
Rezvani's Latest Post-Apocalyptic Monster Is a Ford F-150 Raptor Underneath
Slideshow: Called the Fortress, the 850-horsepower pickup combines Raptor underpinnings with military-inspired features, survival equipment, and a starting price of $285,000.