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My New (Used) Quincy Air Compressor

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roblouvasz

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Hi everyone. I started a thread a while ago about looking for a new air compressor. Well I found a used Qunicy with the pressure lube pump and a new 6hp Marathon motor. I don't think the tank is original. It's dated 1971. It's made by Wood Ind. Prod. Co. I'm going to remove one of the larger tank plugs and have a look inside with an inspection camera. Anyway, the gentleman I bought it from had it running when I went to look at it. I can't believe how quiet it is! Is there a way to tell the age of the pump with the serial number? Here's some photos.
 

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rustyjames

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That thing looks like it was never used. Those plugs are a bear to remove, if it were myself, I would remove the drain to see if there's any water in the tank, if not I'd hook it up and start using it.
 
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roblouvasz

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I removed the ball valve on the right hand side along with the 1/2 ******. I was able to get the inspection camera inside and look around. There is what looks to be a 1/4 or 3/8" drain tube that starts at the bottom of the tank and goes up the side to an outlet but it's got a plug in it. There seems to be debris in the bottom and rust scale but no water. It does have a bottom drain valve. When I opened it, no water came out. I've cleaned the large plug threads with Kroil and started to soak them. I'll keep soaking them for a couple of days and them try removing it.
 
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roblouvasz

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rustyjames said:
That thing looks like it was never used. Those plugs are a bear to remove, if it were myself, I would remove the drain to see if there's any water in the tank, if not I'd hook it up and start using it.
Click to expand...

It's been repainted. That's why I'm questioning if it's the original tank. He told me it originally had a three phase motor on it and he converted to single phase and used it for a while. He came across another Quincy pressure lubed 325 with an aftercooler and is using that on now. I did see some original blue paint near the top thats close to Quincy's blue. I'm going to call Quincy on Monday and try to get more info.
 
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sberry

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The internet has made it a sensation to remove these. I never do unless it would happen to be full of oily fluid. Fire it up and open the valve to the bottom. Blow any loose rust out. The dip tube for the drain was for cold weather really so fluid wouldn't sit in a sump. It never does get all the water out but this is really moot anyway.
I would be hooking and running and never shut it off unless I had to cause it didn't work.
Nice unit.
 
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MacMcMacmac

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I think that pump is a lot newer than 1971. The horizontal cooling fins, spin on oil filter and large setscrews in the valve cover caps show it to be a later model. I'd say mid 80's or newer, but that's just a guess.
 
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Strouty

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I have a mid eighties and it doesn't have the screw on filter, I bet it is 90s. What is the deal with the phony 6hp motor? Is it one of those 3 HP ones? Look on the name plate and see what the amps are, that will tell you what the real HP rating is.
 
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Strouty

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That is good, sounds more like 7.5 HP to me, weird though, 6 was usually used when they did some magic numbers and overrated them.

As for the tank, I used an ultrasonic tester to check out mine. I want to warn you, it had a lot of rust, about half a five gallon bucket full. After getting the readings it was still within spec, so I decided to use it. The tanks like these are not the cheap ones you see on the home owners versions, they were thicker to start with so you have a better safety factor.
 
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md21722

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I doubt you will find a tank that doesn't have some rust scale in it? Where you see pooled water and rust mixing together into a mess you have issues. I would remove the lower drain fitting and go from there. The plugs on the side are hard to remove. I have read that you pretty much need to use heat and then don't re-use the plug, replace it.
 
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Strouty

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nh_yota said:
Hey Strouty what ultrasonic tester did you use to check the tank?
Click to expand...

I used a Defelsko Positector:

http://www.defelsko.com/utg/positectorutg.htm

I use it for work too, otherwise I would have never owned one. I think they can be rented as well. Worked pretty well and made me feel a lot better about the tank.

I still think it is closer to 7.5 than 5 HP motor, but usually a 6 hp is a fake 3 HP. With that FLA, it is definitely more than 5. Was that 240 volts or 120 volts?
 
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Fixnair

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You scored on that one. I've been in the compressor business for over 50 years and this model is by far the best compressor under 10 horse power. This is rated at 5 HP. The motor is probably a 5 HP single phase. Good choice.
 
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pcmeiners

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" I have read that you pretty much need to use heat and then don't re-use the plug, replace it. "
Placed a large monkey wrench on mine with a 3" pipe, place pressure on the end of the pipe with one hand, tapped the plug with a hammer with the other hand, plug gave way.
Not hard.
 
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