Quincy QT5 Governor Setting

by Nicholas
(Washington)

Quincy QT5 air compressor

Quincy QT5 air compressor

Im have trouble setting the governor pressure on my 2009 gas powered quincy qt5 and cannot seem to find a manual on how to do so, I have never seen the regulator type. It has the pressure relief knob which connects to a housing that pushes the throttle cable but I have no idea how to get it to build up to 150psi then kickdown.

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QSB-30 Quincy

by Scott Broussard
(Offshore Gulf of Mexico)

Quincy QSB compressor series (Photo: www.quincycompressor.com)

Quincy QSB compressor series (Photo: www.quincycompressor.com)

Quincy QSB-30 the compressor breaker trips . I thing the compressor does not blowdown and may be overheating.

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AR 5120 pop off above cylinder releasing, water in oil?

by Mike
(Louisiana)

Quincy Air Compressor QR Series (Photo: www.quincycompressor.com)

Quincy Air Compressor QR Series (Photo: www.quincycompressor.com)

I have a quincy QR 5120. I noticed that the pop off's are releasing air while it is running. Also, the oil is a milky brown. It should be a redish color.
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Mike, I wasn't able to find any information specific to your Quincy Model QR 5120.

The QR series seems to be two cylinder, two stage type reciprocating air cylinders.

If this is your type, this is what I think is happening.

Regarding the oil in the air, that suggests piston seal wear, to the point where more oil that normal is wicking by the seals and getting into the compressed air compression chamber. So that means a seal repair job.

As to the PRV blowing off between cylinders, that suggests to me that either the intake valve on the second cylinder is failing, or gunk from the first cylinder (oil - water - crud ) has fouled the intake valve on the second cylinder. If this has happened, then the air pressure in the line between the two cylinders builds to the point where the PRV lets go.

Cheers,

Bill

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