Jeff the reason I am working with the old case ingersoll garden tractors for my EV project is I find them very useful and they run off a simple hydraulic pump. There was a article back in the 80s probably in mother earth news about converting one to Electric because all you need is a DC motor and a switch that can handle the current.
That is the article it doesn’t tell you the important fact of how big a motor you need to run the 12gpm hydraulic pump. Best I can tell a 4kw motor should handle the job but it is a best guess on my part. I guess I will find out as I move forward with my project to make one into a 4 wheel drive machine.
I am trying to avoid the cost and complexity of speed controllers for the motor