5HP air compressor electric motor ?

I got mine from Harbor Frieght somewhere around '99 because my compressor was a 3-phase. It's still going, but it's getting a habit of overheating and popping thje safety if I run it too hard. A 2phase 5hp has to work if the compresor head is any decent size. the more modern ones have to turna lot faster. Mine's an old thumper...