Hey George,
Sorry you are having so much trouble with the mover.
You might check to see if the little magnet wheel is too far from the sensor. There should be a little plastic wheel in there with magnets somewhere and that is what tells the sensor when to send out the pulses. If there is a lot of grease/dirt etc on the magnets or sensor head, or if the head is too far away, that might hinder it.
That's about all I know to tell you. Hopefully someone has a suggestion.
Fred
Just thinking as I looked at the photos posted. I'm used to the VonWeise style actuator and I'm not sure if the sensor in his SuperJack works the same. Can't see it being much different.