[rohrmann]

I used a long box end wrench to back up the nuts inside the box, last year to replace the bolts after having the pin box removed to have the area above welded where it had developed cracks in the frame, as well as another area of the frame that had a major failure. I used grade 8 bolts 5/8" X 11, as recommended in the MorRyde manual, as I have holes slightly over 5/8".