1934 CATERPILLAR Schramm air compressor

My wife and I stopped at the Heritage museum in Libby Montana and found this old very large air compressor. There was a lot of very cool old machinery associated with mining and logging but this was the only Cat.
I was surprised to recognize a lot of very familiar looking parts on the engine. Even though my little D2 is only 7 years newer there is a lot of the same technology. 
Notice the air compressor has its own radiator  [attachment=64120]20210717_115958.jpg[/attachment][attachment=64121]20210717_120003.jpg[/attachment][attachment=64122]20210717_120012.jpg[/attachment][attachment=64123]20210717_115935.jpg[/attachment][attachment=64124]20210717_115945.jpg[/attachment][attachment=64125]20210717_115928.jpg[/attachment][attachment=64126]20210717_120027.jpg[/attachment]

Nice old unit! That would be a D11000 engine/power unit, same engine as in the Diesel Seventy-Five.

That is a after cooler, to condense as much water out of the air as the ambient temp will allow.

she would sure make a racket building full pressure. i wonder if it is air start capable.