I am having similar issues. It seems the adjusting end of the knockout cylinder has actually come down and tightened itself against the spindle, causing the spindle to be tight and blowing a fuse (hopefully nothing more). I can't seem to adjust it back up, as the entire piston rod just turns. I have even tried jamming the locknut up against the cylinder body, but it still doesn't lock the piston rod.
I am also having a little trouble figuring out the air over oil in this cylinder. It seems the upper chamber is fed both air and oil? Or is there some sort of distribution channel in the center block of the cylinder? I am still in the process of removing the cylinder, and hopefully it will become clearer as I disassemble....but any insight would be a great help |