I am trying to repair a very expensive manlift joystick. I had great luck soldering in a new potentiometer on a different machine and getting it back to work, but this other machine has a potentiometer that I have not seen before.
It has 4 pins total, three like a normal rotary potentiometer and then a fourth across from the other three pins.
It is a Clarostat U-10K-OHM Type EJ pot. It has another number stamped "99148B 9507"
Clarostat has been purchased by Honeywell, so I am having a hard time finding any catalogs or datasheets for this guy. Can anyone point me in the right direction or advise what the fourth pin may be for? Would replacing with a standard three pin pot be a possibility?