Also, a 2 minute google search on that pump number you posted looks like it has an RQV governor...auto/truck governor...will SUCK for your application. It will turn all the RPM you could want, but will have no nuts to hold RPM once a load is applied.
You need an RSV governor...AG/Industrial...
The RQV/Auto governor will only govern at full RPM, 2500-3100 depending on which springs are in the pump...you can adjust the throttle stop screw to move it down, but that will back the fuel down as well. When a load hits an auto governor that isn't at
WOT, it falls on it's face.
The RSV/Ag governor will hold a steady RPM, 1500, 1800, 2000, whatever you set the throttle at, doesn't matter, and try everything it can do with the fueling to keep it right there. The load can come or go, and it will try to stay steady.
You want RSV.
Chris