I was able to trace it down to Airman brand ( don’t remember what Japanese corporation makes these at the moment ). Had to
Shuffle through whole bunch of their parts manuals, but looks like closest model is PDS175-411.
This is very well build machine, has all the components in it of quality piece of engineering, like Minimum Pressure valve, oil stop valve, check valve in the scavenge line and so on. Which you don’t see in contemporary portable compressors ( besides probably Sullivan-Palatin, and I have not worked on Sullair units - so I can’t say) Engine and air end is still pretty much kicking “soft tissues” but control parts pretty much wore out and needs to be replaced.
This machine build whole lot better then Atlas Copco XAS units that CP sells under its name now days! Those are absolute cheap junk made in Europe!!!
Same customer has ex military GD, that one build like a tank, really good design on cooler locations, looks like it was hit by the train, but still runs. Although needs a little love though!
