Is your shop heated? What's the temperature of the compressor when it
trips the breaker?

wrote:

I have come in possession of a Craftsman model 919.165200, 5 hp, 20
gallon air compressor that when turned on runs for a few seconds then
throws a breaker in my shop. Anyone have a clue as to why or how to
repair? Anyone come across this problem before?

TIA

Jerry