"STEPHEN" wrote:

I assume this is what you are referring to. I made these many years ago. I think I used 4140, and drilled the center to increase the quenching rate since I was heating with a torch and wanted to maximize the hardness. These pins seem to be a sore point as I frequently see them retained by straps welded to the push beam. Other times they are seemingly impossible to remove.
The bushing? How is your hole in the beam? If it is grossly worn out then holding a bushing in there in a meaningful way is tough. Your pics? Let's see some!