I remember rebuilding those in the Navy. Cut our own gaskets with scissors and a ball peen hammer, hand cut our own Babbitt bearings & brass seals, too.
Allis Chalmers used to make motors too, I used to run into them quite often in old locker plants (slaughter houses), they would be belted up to a Schnake ot Frick ammonia compressor, a lot of the were 50-75 hp single phase, repulsion start induction run Boy would OHSA have had fun in those places The compressors only ran about 60-90 RPM but those mo fo's would keep a blast freezer at -30 or 40 below, they were cool to work on No really
I remember those old frick compressors. Where I worked they called them "heavy dutys". Cathump, Cathump, Cathump....
Another thing about them it only takes you once to learn, they had false heads on them, at least that's what they called them they were spring loaded and if the compressor shut down without pumping out, the first couple of revolutions would raise the head and it would blow liquid ammonia out the slots where it raised If the unit had shut down you had to manually turn the compressor over backwards to push the liquid into the suction line, then it would start good, they also had poppet valves, reeds couldn't handle the mission
