Re: When torsion limit switches don't work, bad things can happen

Posted by HH56 On 2015/4/6 18:47:39

I have good gears for Panther, but does anybody know where one gets NOS or replacement 1956 limit switches? I need a set for Panther.

If the usual vendors don't have NOS or rebuilts then IIRC, a year or so ago Mr Pushbutton was thinking of adding their repair to his services. Haven't seen him online much lately so don't know if that ever happened.

The switches themselves seem to hold up or at the worst need a soak in contact cleaner followed by vigorous working of the button -- unless the button is actually broken off. At that point the switch has to be opened and a new button machined out of nylon or Delrin. Opening the switch is not too much a problem but closing it back up is.

I've seen more of the switches that failed because the old wire had hardened and the constant flexing from vibration had broken a wire right where it was soldered or crimped into the terminal. On a couple I've carefully drilled the old broken strands of wire out of the terminal to create a new hole and soldered in a new wire. Except for it sticking straight out an extra 3/4" you could probably use a crimp connector too. Wrapped the threaded end of switch to keep the stuff out of the works and then used a dunk in Plasti-Dip to renew the waterproofing.