Quincy Air Compressors


Quincy air compressors has been in business since 1920, when they introduced their first product offering. It was vacuum pumps, designed for milking cows. They have sure come a long way since then.

Now, Quincy manufactures an industrial line of reciprocating and rotary screw air compressors. You can purchase an industrial type Quincy air compressor through their distributor network. Their website provides a search engine to help you find your local Quincy compressor distributor.

Quincy air compressors are powered with electric motors ranging from one-third HP up to 350 HP.


Quincy air compressors

Quincy also offers a more garage-shop oriented line of reciprocationg air compressors. Those looking to buy this type of Quincy air compressor have the option to buy on line through Northern Tool, Amazon, Tool Zone, Air Compressors Direct and TP Tools & Equipment.

The Quincy air compressors website offers a host of information about their products, including a convenient download portal for manuals etc.

If you are looking for support on a Reciprocating type air compressor, here is where you go:

Quincy Compressor
3501 Wismann Lane
Quincy, IL 62305-3116
W: http://www.quincycompressor.com

For information and help on the rotary screw compressors, here is that location:

Quincy Compressor
701 North Dobson Avenue
Bay Minette, AL 36507
W: http://www.quincycompressor.com

The Quincy air compressors page on this website is provided to allow users of Quincy air compressors a forum to publish issues and comments from folks that use them.

Please, before you use the form below to post a question, read the existing Quincy posts, and also visit the troubleshooting section to see solutions to problems that are common to many brands of air compressors.

If you are familiar with a Quincy air compressor and have some advice on an existing post, please use the comment button to add your information. Let other Quincy air compressor users know of your experience with this brand.

There are lots of postings in this Quincy forum now, so here's a search box to help you find them:

Here are some quincy air compressors manuals that kind folks have sent in for me to upload here for your use. Click the link to download to your computer. Save the download so you have it for future reference.

Below is the form to ask questions. Thanks for asking, and thanks to all those that help by answering them too.

Bill

Quincy Compressor Issues

Having an issue with your Quincy air compressor?

Here are other visitor's issues with Quincy Air Compressors

Please see below. You may find a solution to your problem already posted.

qt5 will run for 10 minutes and shut down 
I have a qt5,it will run for 10 minutes or so,it will shut down,i wait awhile and hit the reset button,and it repeats this pattern again.whats its problem. …

What size electric motor would be right for this compressor 
honeywell-on the tank-Quincy on the compressor

Quincy pilot unloader test bench for adjustment available? 
the company i work for uses quincy 325's and 5120's(rotary compressors). im well versed in adjusting the valves while on the compressor. problem is, its …

Quincy QT15 not releasing air from cylinders at the end of the cycle 
Our compressor is setup for start stop operation. When the compressor stops it will not release the air from the pistons. When it starts back up to …

Dryer is blinking P2 
Quincy QGS-10 Dryer is blinking P2 what is the issue and how do I fix it?

Quincy 325 compressors are leaking air 
Quincy 325, the compressor pumps up good, when the system shuts down and the unloader opens air will leak from the intake value until the tank is empty. …

Water in Quincy 325 oil 
Water in Quincy 325 oil, timed unloader valve solution. Since installed, I have found a lot of water in the oil from what I assume is inlet air. …

Motor HP to run a Q325 to maintain 190 psi?  
How many horse power does it take to run a Q325 to maintain 190 psi? I would like to run this compressor with a hydraulic motor, how big will this …

Would like to put a 10 hp motor on an older Quincy 390 
Information on an older Quincy 390.. Would like to put a 10 hp motor on it. Looking to hook up a Quincy 390 pump to a single phase 10 hp motor. Is this …

what motor size and pulley do i need for Quincy 230 
Model Quincy 230-27 pulley size 16" x 3" two belt what size motor hp do i need for single ph 220 v along with pulley size

What pulley size for 370? 
using existing 5 hp 1 phase motor to turn Quincy 370 What size pulley should be used to turn compressor to apply oil pressure and about 175 psi for air …

QTV 54 Quincy leaking air 
I have QTV 54 Quincy about 3 years old. I don't use it much sometimes more then it might sit for months , started it up to fill a tire , the valve behind …

15 HP Pump RPM 
I am changing pump heads and have a 20 HP motor that i am putting a 350 15HP Head on. What should the Pump RPM be.

QTV-54 Surges on start-up 
My 2 1/2 year old Quincy QTV-54 two stage compressor started surging on start up a few weeks ago. When starting the speed fluctuates up and down until …

5hp Quincy air compressor frozen 
5hp reciprocating Quincy air compressor circa 1960's with 220v two stage motor. Motor is fine. Flywheel doesn't turn (frozen) thus nor do piston. …

quincy air compressor will not build up any higher 
I have an old quincy air compressor. starts up fine will build up to 30lbs pressure and will not build up any higher,everything is still running but it …

Temperature Transducer Fault on Quincy QGV 50 
We have a Quincy QGV 50 rotary screw compressor. I keep getting a Temperature Transducer Fault(short or wire break). We can reset the alarm and run the …

Testing Pressure Relief Valves on Quincy compressor 
I was checking the PRV's on our Quincy 5HP Two-Phase 80 gallon compressor. There is one on top of the motor, one at the top of the tank, and one on the …

What motors and pulleys for a Model 210PUL 
I have a Quincy Model 210PUL with a 12" pulley. I also have a 1HP, 3450rpm motor with a 2" pulley. Will this combination work? What other motors could …

Power supply for 5 HP Quincy compressor  
i have 30 amp service in my shop.I'm looking to buy a Quincy 5h.p. 80 gallon air compressor.Quincy states that 50 amp is required.I looked at the motor …

What size electric motor is needed-hp-rpm for Quincy model 325-100 
I have a Quincy model 325-100 head, serial number 310948, I would like to know what hp and what rpm electric motor I need to run it

Quincy Won't build PSI above 50 
I have a Quincy. When the compressor is running, air comes out of the crankcase vent and won't build past 50 PSI. I took apart valve plate assembly and …

Quincy QT5 won't turn and blows breaker 
I try to on my Quincy 80 gal QT5 air compressor this morning and it hummed and blew the breaker. Tried again and same thing obviously. I called Quincy …

Speed variation in Quincy 5 HP compressor ... 
Compressor slows down then at time sppeds back up, at time can go hours and days withoutthis happening then next day froma startup 30 seconds or so slows …

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Pumping issue with Quincy 325 compressor 
I have a older Model 325 2 cylinder piston air compressor. It has given years of good service but recently has started doing something strange. It will …

Which wire are hot on Quincy QT5 air compressor ... 
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 …

Quincy air compressor chatters before cut out... 
Quincy two cylinder driven by 3 phase 5 horsepower motor works well. I have replaced the pressure switch, the hydraulic unloader, the associated cylinder …

Quincy 308 takes a long time to fill ... 
Rebuilding the top end. How do I replace the valve discs? I cannot figure out how to open the valve cages. Approximately how long should it take to …

Quincy compressor showing dewpoint fault ... 
The Quincy compressor registered a "dewpoint fault" and air is blowing out of the "water" valve. Please advise. __________________ OK, I know what …

How can you date an Quincy compressor pump? 
It is a Quincy 310 11 serial # 68342L

How old is my Quincy QT? 
Its a Model MQT 7.5 Serial # 5083588

Quincy QGS-15 trips off of high temperature 
We have an industrial air compressor that will run for up to 5 minutes then trips off of high temperature. There was a previous issue of someone accidentally …

Older 325 in a home garage seems to be making as much water as it does air lately 
Older 325 in home garage seems to be making as much water as it does air lately. Quit using it over the summer and went to try, and found the valves/mushrooms …

QTV5 - I flip the on switch it either does nothing  
I've had it in service for less than a year. Now, when I flip the on switch it either does nothing or quickly spins out. Any ideas what is out? Is it …

15 hp quincy screw compressor not building pressure 
My 15 hp quincy screw compressor not building pressure

Quincy QT-5 air compressor will not start after stopping on its own ... 
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 …

Quincy 325 air compressor runs for 20 seconds then trips breaker ... 
Quincy 325 compressor 5 hp Baldor single phase motor 26 amps with a 1.0 service factor connected to a 30amp breaker 220V. I turn compressor on with …

Quincy QT5 governor setting ... 
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 …

Capacity of a Quincy QI 1000 ... 
why all of a sudden is our compressor modulating when it always ran at 100% for years? ___________________ Michael, you know what you mean by "modulating", …

Quincy 1968 QT-5 binding after bleed down ... 
I have a 1968 QT-5 air compressor. After the pressure goes below 60psi the compressor tries to start but it is bound up. If I turn the throw switch off …

Quincy 26 gallon portable compressor ... 
Quincy 26gal. portable,bel-aire 26 gal portable, chicago pneumatic 26 gal portable I am looking at purchasing one of these compressors. They all appear …

About Quincy air compressor regulator replacement ... 
i just bought a quincy upright compressor with wheels and i have to hook up regulator there are 2 hole openings and a diagram to show me how but i'm …

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