My old one is tractor PTO shaft driven.It's an old one that I bought last year.540 rpm at shaft times 3 is 1620 rpm at pump.It wont split big chunks or green wood.How many tonnage are these typically? It has a 4.5 in cylinder with a 2in ram.Looks heavy duty. I dont know what gpm the pump is.I was thinking about putting a gas motor on it to drive it. I'm thinking about 8 cords for the winter. What is normal rpms of a pump that is running a 20 ton system or 30 ton? I'm trying to get a better idea of what I would need to replace to make a better splitter out of it. Is all I need is a motor and new pump to have a good splitter?