Old air compressor pump

[bap5306]

I had bought an old cast iron air compressor pump. I am trying to find information about it. I bought just the pump and do not know what engine was paired with it or who the manufacturer is. The only stamp I could find has 302 853 over the oil drain plug. I have some pictures for visual aide.

 

[nadogail]

With a three groove pulley, it will not be a small motor or engine.

What is your intended use for the compressor and what size tank will you be mounting it on?

 

[MacMcMacmac]

This is a Brunner A2000. Looks like it's setup for reefer duty.

https://ln.sync.com/dl/935bc7ba0/vf4djwhq-tcd6mgxr-e7k5m6dc-zngna955/view/default/1913297260009

 

[The Cobbler]

looks like a refrigeration compressor

 

[metlmunchr]

Definitely a refrigeration compressor. And they don't make good air compressors because they're designed to carry oil with the refrigerant and therefore the pistons have no oil rings.

 

[68futura]

These Brunner compressor can be converted for air compressor use by plugging a passage to isolate the crank case from the top end. This is an R-2000. The R line pumps had the same piston rings as the A line (i.e. A-2000 air compressor). This pump has 2 compressor rings and an oil ring on each piston. They will work just as well as one built for air use