Hey all,

I just bought a spare compressor from my fire dept. Currently it is set to run at 240v but I'm hoping to run it at 120v. The motor has a diagram showing the wires that need to be switched on it but I have a question about hooking up the wires to the compressor. It has this contraption on the side and I'm not 100% sure what it is. Maybe a pressure relief valve?

Anyway, it has two black wires coming in and two black wires going to the motor. Can I just change one of the black wires to a neutral? Or can I bypass this and wire directly to the motor?

Any help would be appreciated!IMG_1003.jpgIMG_1002.jpg