Trying to test hydraulic system in my M-444 without an engine

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Active member
Sep 2, 2023
I have a Melroe M-444 from around '63-'65 era. My unit was completely not operational when I bought it. I've pulled out the seized engine and are looking for a replacement. While I'm looking, I wanted to see if there is a way to test out the hydraulic system. If I could spin that pump shaft some way, perhaps it could pressurize the system so I could check for leaks and see if the valves are operating the cylinders, etc. I don't know if they are operational or not. I have a 2Hp 220V electric motor from a Jet mill that I'm thinking of rigging up to power that pump. It spins at 1750 rpms - this should be a safe range for that pump. I don't need to run it long, just enough to check the movement of major valves and levers. Will that work? Thoughts, cautionary tales, etc