2014 270HG Bed Adjustment

Was wondering if anyone can help me find a manual or video to adjust the bed in the garage of my HG. It has never worked properly from the factory and has been back to the dealer twice to adjust. The problem is after the bed goes up and down about 5 times the front of the bed stays higher making the bed uneven. I like the rest of the trailor but this is very frustrating.
 
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