Dennis, I'm not sure that it is relative to 51' , 2 Ton, but on my 54" 3600, I had to remove the side bolts and loosen both top bolts, the front one a lot, to tilt the steering column down so I could replace the foam and the seal. I had rebuilt the steering box and reattached it to the frame and the pitman arm just to later find out I couldn't get the seal on. Hope that helps.
