CAT GUY - SON bought a 5 HP Quincy #325 80 gallon tank 2-stage. It was bought as the Original compressor for the semi-truck shop and gas station at The DECK Truck Stop Exit #19 Geneseo, Ill, I-80 and Rt 82 in 1964. They closed the shop, sold the compressor to a 3-4 stall auto body shop to run spray guns, air sanders, I'm surprised a 5 hp kept up, then it was bought as a back-up compressor for an addition to a machine shop, most new machine shop machines need a source of compressed air, lot of air activated clamping jaws, clutches, etc. The machine shop moved to a larger building and installed a new bigger rotary screw compressor. SON bought it. Hauled it home in his 3/4 Ton truck, there was a backhoe/endloader working on his driveway when he got home with it, They unloaded it and set it right in front of his garage door. He could remove a few pieces like the all copper & cast iron 5 hp motor, and 'walk' the compressor across his garage. He had removed the comoressor from the top of the tank a time or two but normally had a couple friends come over for that.
The motor and compressor and the tank sat around my shop for a couple weeks and 2 years ago I scrapped the tank and motor. The compressor is still in my shop. SON had an air compressor service shop in downtown MOLINE, ILL, that stocked a lot of Quincy parts, they knew what part fit which compressors, and if they didn't have them they could normally get them by the next day. Stuff you would be amazed they stocked. No need to deal with Quincy. Prior owner had messed with the reed valves in the head and glued everything back together with blue rtv. SON took everything apart, cleaned the goop out, bought gaskets & o-rings, rebuilt the heads, unloader, and it was much quicker coming back up to pressure. New piston rings, maybe new oil pump, yes, it IS pressure lubed, even has a guage, Some Quincy's have a spin-on filter! Quincy have 100% duty cycle, the factory on Quincy compressors made in Quincy, Ill the company prefers they run for EVER, never stop!
Quincy imports compressors now days. SON is going to buy a new tank for his, there's an electric motor shop in town that rebuilds motors, We'll see if they can get a good 5 hp or 7-1/2 hp motor for it, hone block and install new rings and it will run another 57 years.
SON had the compressor sitting about 2-3 feet from his head at 120-150 psi all night while He slept in his bed. Not sure I would have trusted a 50 year old tank that much. My Uncle was TERRIBLE with tools, bought a portable 20 gallon single stage 1 or 2 hp compressor, never drained the air tank, He comes home one day, opens his garage door and he sees daylight through the exterior wall of his garage, He can see into his basement, most of what was left of the compressor had bounced off the garage door, dented it, tank pretty much turned itself inside-out. The pump & motor ended up on a 50 gallon tank that DAD gave to me, the tank dripped water out the bottom, I never had to drain it. I bought a brand new 7-1/2 hp Porter Cable 80 gal 2-stage 26 cfm compressor. I wanted an Ingersol-Rand but they wouldn't deal.