I am trying to fix up a Vandercook 4T. When I press on the foot pedal, the pedal moves but the grippers donâ€™t. At first I thought that the chain had stretched but when i look at the joint where the bar from the foot pedal connects to the bar that moves the chain, I can see that the joint is slipping.
I can pull on the chain and get the grippers to operate so I know they arenâ€™t stuck.
How can I keep the joint from slipping?