I have a 1960 MF 65 with a Perkins diesel and power steering. While mowing the other day my steering wheel lost all tension and would actually spin 360 degrees with no movement of the linkage. After opening the side cover on the steering box I noticed the pin that rides the worm shaft had came out of the lever shaft. All the rollers were in the bottom of the gear box. Where can I find the pin to replace this? I have looked everywhere on the web and cannot find this pin or the complete lever shaft for my tractor. Is the rollers part of the pin assembly or a separate bearing? It was too mangled to tell. Thanks