I have a 1950's Koken Barber chair (523NE) that I'm restoring. The chair did not raise up or down when I bought it and upon inspection I found that the piston is frozen and will not move up or down. Thus, the previous owner broke the shaft that connects to the piston trying to get the chair to pump up or down. I assume the piston should pull straight up out of the cylinder for repair and service and I have pushed and pulled on the piston fairly hard without and movement. I have not been to forceful in fear of breaking the piston.
Does anyone have any suggestion or comments that would help me out, I would appreciate it very much!