I have an Atlas 9KOH that's 10 years old and the hydraulic cylinder seals are leaking. I found a company that sells the seal kits, got one of the cylinders out and got the ram out of the bore. Unfortunately the piston does not have a nut to attach it to the ram like I was expecting. It's clearly a separate piece from the ram as it spins freely on the end of the ram, but I cannot figure out how the piston is attached to the ram. Since the chain roller carrier is welded to the other end of the ram, the only way I can replace the seals in the cap is to remove it from the ram, but to do so I need to get the piston off. Has anyone encountered one of these before?

