Quincy QR-25 Used purchase

A 7.5 HP F340 80 Gal Quincy is available to me. the tank was made in 1985 and it is said to be in working order. No 3 phase to test. No visible rust on the exterior and it is said to have been located indoors all its service life. It has a Marathon electric motor and the pump looks to original to the tank. Was that the correct motor for that model? To have the item shipped to where I want it would be about $500. What would be an opinion on this potential purchase? Any advise on what to look for or questions to ask the vendor? any and all help would be appreciated.

thanks

Link

Brimo

This unit also has no check valve in the tank, and uses the exhaust valve for that purpose, which works, but is not a preferred setup. Might improve air delivery a bit, since the inlet to the tank is the full pipe size from the head. Saves money on a check valve for the factory though, lol.

Looks like the stock motor.

I'm told the unit was well maintained and has been idle for 3 years which cuts the actual run time on the pump assuming that is the truth. and we know people don't lie about those kind of things. lol

I think I may be able to cut the cost+shipping to about $550 total down from $800 with better shipping rates.

How much would a rebuild kit run approx? I will have to contact vendors for a quote since I can find no online price listings. I thought you may know the cost ball park.

I have rebuilt a couple of motorcycle and GM engines is this something I could take on myself? I would like to learn how to do it. If so can you suggest service manuals/documentation sources for that purpose.

Thanks again to everyone who has helped with their thoughts.

Here is a front view of the unit
Link

Brimo

You are a wealth of information and I greatly appreciate you and everyone else having taken the time to share your knowledge. At the risk of wearing out my welcome and running this beyond reasonable, I have just a couple more question. You stated "if the unit was not run out of oil". Aren't the unloaders supposed to protect the bottom end if that occurs? And if it were run out of oil is it true the unit should probably still be serviceable. Further, if you don't mind may I ask you for advice frome time to time if it is needed when the rebuild takes place? Thanks again

I think I have decided to go ahead and try to purchase this unit knowing that there is risk with this as with everything. Bringing this Quincy back to tip top would be enjoyable for me as a project. I think with yours and others help here at Yesterday's Tractors and my research on the going market for this unit at least some homework was done and the decision it not completly without forethought. This is really a great site and very freindly. I had been here a long time ago before when I contemplated an old tractor purchase that fell through but I didn't realize there is more to this site than Tractors. Thanks to everyone here at Yesterday's Tractors.

Brimo

It makes no sense to operate an air compressor off a phase converter. They draw too much power. You should only buy one of these if you have 3 phase power available or if you plan to put a single phase motor on it.

A magnetic starter is basically just a big relay with motor overload protection built in. The pressure switch activates the relay coil which in turn pulls in the contacts that supply three phase power to the motor. If you know what you are doing you can pick up what you need on ebay for as little as $30 or so. Brand new motor starters in a nice enclosure from the electrical wholesaler are more like $200, so if one is available with the compressor, by all means grab it.

Pay $300 shipping? I'd pass on any deal like that.

The details I have found online say the weight of that model is 1095.lbs is that right if you know approx?

I had considered building a rotary phase converter perhaps with a surplus motor to run the unit since a rotary phase converter damages electric motors due to the out of balance factor. do you think it would be better to go with a single phase motor?

I have an old 3HP IR oiless which is inadequate (CFM) An I would rather get a quality unit and have heard quincy is the hands down best!

The mag starter is a box with relays in it. the pressure switch operates the relays, the relays control the current to the motor. They also act as current limiters, tripping out if the current draw is two high.

Three phase compressors are a dime a dozen because few people have the capability to run them at their home or small shop. The difference is that you are looking at a quality compressor, if you can get it for a price that would allow you to change the motor and afford to ship it to you and it still be a bargain, go for it. Be sure and weigh in all the costs, it may not be worth it, unless you plan to go get it yourself (and with gas so high, that could be a problem too).

Charles

"Be sure and weigh in all the costs" Yes this is proving to be more dificult than I had anticipated. I can Freight it with Central Freight to the terminal for around $350 which is about 10mi down the road. but I have only a 1/2 ton pickup. Not sure If I should/could transport it with that if it is 1095lbs. Then of course the problem of unloading it since I have no forklift where I want it. I have a cherry picker though balancing that load presents a danger. Logistical problems abound. But I'm really begining to get my heart set on a Quincy though.
For the phase converter
the information I have run accross suggests I would need something on the order of 50Hp for the idler motor.

I looked into building a phase converter for my compressor when I got it also. I talked to a really sharp guy who sells them off of ebay and he told me that the problem is that the converter has to run when the compressor is not running so if the compressor were to kick on it can supply it power. He said there is no real good way for the compressor to trigger the converter to start it so it can supply the compressor with power. Where I live it at power isn't cheap so I just swapped it for a 7.5 horse Baldor Efficency motor and a Furnas motor starter. I think that cost me around $500 after shipping the motor from MA to OH.

I would also keep my eyes open for auctions in you area. It seems like industrial size compressors go pretty cheap at the ones that I have been at as most people don't wanna deal with moving them.

Scott