I've had my good ol' trusty Craftsman 20 Gal compressor (model #: 919.176730) you years now. It has a dual voltage motor (MO-6340) but it's always been wired to 120V.

I recently added a 240V line to my garage and successfully changed most of my dual voltage tools to work with that voltage, however I'm having a hard time changing this compressor to 240. I'm attaching the pictures of the "wiring diagram" from the motor and a couple of pictures of the insides of the wiring box. The diagram puzzles me because it looks completely different from the actual wiring. For example I don't see any "orange" wires....

Any help is greatly appreciated.

-Gabor

 

This is too easy. Plain fact is, this is not a dual voltage motor, it is 120 volts only.

 

Thanks for taking the time to respond but I think I'll have to disagree. The other plate on the motor (which I didn't take a picture of says 120/240) and the manual says it's dual voltage as well (page 5 here: Manual). I don't think they'd make a 3hp motor to be 120V only.

 

If you have further information on another plate..... post it !

 

Above is from the manual you posted. Have you looked for the instructions mentioned?

 

The conversion instructions are not in the manual. They will be on the back of the wiring cover on a MO-6340 motor.

 

Thanks everyone for taking the time to reply. I took the wiring plate off again, just to make sure that I didn't miss anything and there's absolutely nothing on the inside of it - no diagram whatsoever. I think I might just have to take apart the motor to identify the wires coming out of the 2 windings. If anyone has any further information that might help, I would greatly appreciate that!