Older Quincy Compressor

[RobFromCrook]

Hey guys, newbie here, I often have read articles, but never registered or posted til now- I picked up an older Quincy compressor with a Binks pump on it- as I always do, I threw my hat over the fence and now am trying to figure out how to get over there and put it on my head..
this has a Binks 33-576 pump, with a Baldor 5hp 3phase motor, and I put in a chinese single to 3 phase convertor for power. I went over the motor, I am fairly certain I have it wired up correctly, this morning I put the belts on and the motor pulled it over a turn or 2 before popping the breaker. Any suggestions on things to look for on the pump?
Also- I have a Binks pump that I picked up years ago from the Binks facility in Franklin Park, IL (if I am remembering correctly- that would have been mid 80s), that one is a 33-537 pump. (That sat in my dad's garage, then I got it back when he downsized, and I nearly junked it several times.) That one has never been used, anyone have access to info on it, would it match up to the motor properly? It looks to have the same flywheel on it, mounting looks close. Any help, comments, snide remarks would be appreciated, and if they produce an lol, I will acknowledge..

 

[RTM]

Big gap in catalog years, not sure what is in this catalog.

Binks : Everything for Spray Painting : Catalog No. 956A : Binks Manufacturing Co. : Free Download, Borrow, and Streaming : Internet Archive

48 p., illus., 26.8 cm, trade catalog

archive.org

 

[RobFromCrook]

Thanks, I'll look through it. Trying to do this without throwing money at it.

 

[TeenagerThatLikesFloorjac]

Binks 33-576 would be a Quincy 325 pump. There is usually a tag on the oil dip stick cover. It indicates the Model, ROC (Record of change) and serial number. I believe the ROC is also stamped onto the face crank where is meets the flywheel.

More info can be found at quincycompressor.com
-> resources -> Literature Library -> search QR325

If you can spin the flywheel over by hand and there's no weird binding, i would say the pump isn't the problem (for now). What is the rated RPM of the baldor 5hp motor? What is the pulley size on the motor?

As for the 33-537, look at the plate on the oil dip stick cover or post a picture. Once you know what to look for its easy to identify a Quincy within a model or two (intercooler, valve style etc)

 

[RobFromCrook]

Thanks. Plate with black background is pump currently mounted..
The 3 phase motor probably needs bearings if I want to continue to use it, but there's some decent video tutorials on that. From what I've read the 3 phase motors aren't too bad to pull apart. (The newbie said confidently.)
I will measure flywheels and post that in a bit.
Thanks for the responses, guys..

 

[RobFromCrook]

From what I could tell, the 33-537 is a single stage and the 33-576 is 2 stage, going off the catalog posted by

 

[RobFromCrook]

Sorry posted by RTM

 

[RobFromCrook]

These are pics of the 33-537, it has a 16" flywheel

 

[RobFromCrook]

These are pics of the 33-576, also has 16" flywheel

 

[RobFromCrook]

Reading out of RTM's catalog posted last night, it seemed like the 576 was intended for a higher pressure application, which would make sense, the unit came out of a concrete yard truck garage. If the other (the 537) pump is a lower pressure unit, that would suit me fine. Figuring to swap it over at some point and try it, if that doesn't raise red flags. Any thoughts as to quick service of a unit that's been sitting for several decades? And yes, both units do seem to turn over, but the 576 has a bit of a hitch in it, it seems. This is the first time I've done anything with a compressor pump as far as trying to diagnose or fix things, so I'm in the learning curve. Plenty of time working in shops, but usually it's flip the breaker & go to work..

 

[RobFromCrook]

Binks 33-576 would be a Quincy 325 pump. There is usually a tag on the oil dip stick cover. It indicates the Model, ROC (Record of change) and serial number. I believe the ROC is also stamped onto the face crank where is meets the flywheel.

More info can be found at quincycompressor.com
-> resources -> Literature Library -> search QR325

If you can spin the flywheel over by hand and there's no weird binding, i would say the pump isn't the problem (for now). What is the rated RPM of the baldor 5hp motor? What is the pulley size on the motor?

As for the 33-537, look at the plate on the oil dip stick cover or post a picture. Once you know what to look for its easy to identify a Quincy within a model or two (intercooler, valve style etc)

the motor rpm is 1750, pulley is 7 5/8 or 7 3/4 out side of grooves

 

[TeenagerThatLikesFloorjac]

The motor RPM, and pulley diameter seem correct. ~850 rpm from my calculations which is perfect.

33-576 (Quincy 325) is a 2 stage compressor, easily identifiable by the finned copper tubing behind the flywheel. Rated for 400-900 RPM (8.3/18.64 CFM) operation with a 3-5hp motor. Max continuous output pressure is 200psi and intermittent operation up to 500 with some add-ons. Pressure lubricated and 100% continuous duty cycle. Many consider these Quincy QRs the best pumps ever made.

As for maintenance to bring it back to service; Drain oil, remove dip stick cover, inspect crankcase, inspect/clean the oil pump pickup "filter/mesh" and wipe up any dirty residual oil at the bottom of the crankcase. I've seen posts of people having very nasty stuff at the bottom of the crankcase. Fill with non detergent compressor oil, 20W or 30W depending if you're work place is heated in the winter etc. I use Valvoline 30W non detergent from NAPA. I suppose the quincy branded oil is "ideal"

Next would be inspecting, cleaning and lapping the valves. There are multiple videos on youtube about this. You could potentially do this later once the pump actually spins. A very basic test would be putting your hand over the intake port and spin the flywheel, it should vacuum onto your palm. If it ***** your hand and the pushes it away there's a valving problem. Same for the discharge port but it should always be pushing air out. If that tests passes it will likely pump air.

The "hitch" on the 576 (325) pump is slightly concerning, perhaps some rust from a valve sitting on top of the piston getting squished when turning it over.

The 33-537 seems to be a Quincy 240. Single stage 3 - 7.5hp. Great pump but technically limited to 100psi output. That might be a bit low depending on what your use case is.

How does the baldor motor turn over by hand? I would imagine the bearings would have to be trashed for that to be the reason for it not having enough starting torque.

A nice collection of Quincys you have there, there is no such thing as having too many.

 

[RobFromCrook]

Thanks. I am figuring on swapping the pumps out today. I will update once I do that.