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Wiring 1/3 HP type 123D17-1 westinghouse motor.   this did not work for me even when i hooked directly to lines with cheater cord (no reversing switch)  the external 60 mfd capacitor in the original ckt was in series with a thermal switch also remotely mounted. i think they were in series with the start winding. even putting them back does not help.  this motor is in a sears garage door opener 139.655.
I have disassembled the original wiring to make a tire lift for my 78 year old mechanic friend who struggles lifting truck tires with car on lift.  I used a push button (Mometary) and a 3 way light switch (for up / down) to control a 11 pin relay (reversing)
to reverse the red and black start winding's per your diagram. i also used the end of travel switches to stop motor in that direction. the extra contact from relay was used to connect end of travel n/c when not in that direction.  
basically the relay n/c contacts run the motor up when push button actuated. and up down sw to down energizes relay reversing black /red motor leads and connecting down limit switch in ckt (n/c)
thank you
p.s.    could not find schematic of original wiring diagram in sears garage door opener 139.655 using Westinghouse 123D17-1 motor.  its 5;30 AM  JUST BOTHERS ME THAT IT DID NOT WORK

Sorry for the delay, the flu done got me. I tried to find your original question, to refresh my memory, but couldn't. Did you get the motor to run just by itself? Here is a diagram of a switch, 3 PDT momentary,that would eliminate the two switches you have now. You might could integrate it with your limits. You would disregard T2 and T3.

Not sure of the schematic, so I won't deal with it at the present.

Not sure I've helped anymore, and hope you get it going.  

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Charles C. Jones


Let Me help you with your problems with single phase and three phase electric motors. I can tell you how to troubleshoot your motor problems. From simple testing of capacitors, how to test your windings, replacing bearings, and general maintenance. Before we go any further, remember these words of advice: Disconnect the power before you do anything! Please limit your questions to electric motors and there immediate components. I review each question, and if I can answer or help, then I will. If you receive a rejection, it means it is out of my expertise, and just do not have the answer. I'll be waiting for your question.


I have 40 years experience in the repair of electric motors and related equipment. I am a master machinist in the field of motor repair. I was employed with my company for 35 years, but retired in May of 2013. The downside to that is I lost access to a lot of technical data. I will still try to give you the most accurate advice that I can.

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