Steve here... I have a really dumb question. When you guys are running your loaders, is there any rime or reason to throttle speed... Does the pump need full rpm to work efficiently, or can you run at 1/2 or 1/4 throttle. I was moving loads of topsoil with mine at about half throttle, and seemed fine. But does the diesel/pump need high rpm or low rpm to run better and last longer. Hope my question is clear Steven