quincy qt5 Which wires are hot??

I have an older quincy qt5 air compressor. my question is the four wires on the power plug red,black,blue and green i know the green is ground are all others hot

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May 04, 2013
QT-5 stopped running...
by: Bill

HI, I was working in the garage with my QT-5 running a rotating mini sander for about an hour when the compressor just stopped running. I checked the fuse box, nothing tripped. Checked voltage at the panel; two legs of 120v coming in, voltage coming into the switch, and going out.

The compressor is used once in awhile, as it's a hobby machine for me so it does not get overworked. It is about three years old and looks and runs new. I know there are some thermal fuses somewhere, but can't find them (if they don't reset on their own). Needless to say, I haven't had this happen before.

Thanks,
Bill
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Good that you checked the power to and through the pressure switch, Bill.

Based on what you've written I would suspect the start and / or run capacitor as being the problem.

If the start cap fails, sometimes in so doing it will not allow any power through itself, ergo, nothing at all happens when the pressure switch trips to on.

See the page on this site for checking caps.

Bill

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Identifing an engine and cracked cylindar bore

by David Vrablic
(Albany, NY)

This is just some more information: I was looking for a way to identify the 4 cyl diesel engine in my 160-D.

The number on the block was something special between Colt / Quincy and Hercules.

By researching the number stamped on the valves, the number on the head and the head gasket number we were able to verify that I have a D2300 Hercules engine.

The reason the information was needed was because the engine will not turn over.

I opted to pull the head and found a bent push rod, cylinders full of water and the #2 bore has a crack in the middle of it. I will have to do a tear down, Bang the pistons out of the bores and pray the crack doesn't go all the way to the top or the bottom of the cyl wall. If not I can get it bored and sleeved and save it. If not I will be looking for at the very least a used good block. Wish me luck ;-)
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You have it, David. Thanks for writing in.

Bill

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