I suppose air tools are as much 914-related as jackstands are... And although these days it seems they are considered disposable, this one has grown on me and a rebuild kit is available so I did the work. Maybe someone out there may benefit from the photos.

It's a 3HP motor, which is within a 1/2HP of my push mower.
EDIT: Guess I should mention, it's an ATSCO 1700.


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Removed the guard:
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Removed the end cover:
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Removed one handle:
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...and the other handle:
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Took a break, refreshed my cardboard...

Put the end cap back on while I was away, this is the motor by itself:
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End cap comes off again, gasket is a replacement item, natch:
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To get the regulator out, gotta grab it here...:
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...and spin out the regulator assy. It's a left hand thread:
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The motor endcaps/bearing cups are line-to-line fit with a key. Once the regulator is out of the way, they can be pushed out with the shaft.
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Here's one end off, showing the rotor:
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And the other end popped out with the shaft attached. If everything is clean, the vanes will just fall out. Vanes are a replacement item:
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The cap and the bearing cup on this end are separate pieces. There's the shaft key for the rotor lying there and the other gasket to be replaced:
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I used those before, Man killer

This shaft assy was a bit of a puzzle. Decided to ask a guy at the maintenance place before I got too far up the "bigger hammer" ladder. He said, put the shaft ket back in the slot and slide the rotor back on the shaft. Wrap the rotor in a piece of leather or similar and clamp gently in a vise. Then spin the end plate off using the flats:
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If the bearing needs to be replaced, it is pressed in to the plate with the bolt holes, and trapped by the adjacent plate, which is screwed on with left-hand threads. That adjacent plate has no flats, there is just a hole in the side of it, I assume to take a spanner-like tool if you do not want to use a more galoot-like method of removal.

Soaked everything in light oil, deglazed the pan with a nice Riesling and put it all back together. Purrs like a kitten and sucks air like an asthmatic triathlete.
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https://www.flickr.com/photos/dystopos/8692...in/photostream/

Now THAT'S cool!