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Message: <blockquote data-quote="wingspar" data-source="post: 1109" data-attributes="member: 176"><p>Shane, does Bobcat still use gearpumps for the aux hyd? I didn't think slowing the RPM's down would work very good for limiting GPM, but I guess I haven't tried it in a work situation. Can it still reach max working pressure? One thing about higher GPM, it's not as hard on the attachment hyd motors as higher pressure can be. So if you can live with the faster RPMs at the attachment, I don't think it's a real big deal. At higher pressures, geroler and gerotor type hyd motors become more inefficient too. I'm starting to like CAT's aux system more and more. They use a pressure compensated, variable displacement piston pump I think. It maintains max pressure but backs off on the GPM when the going gets tough. This allows the attachment to maintain max torque when you need it most. Handy for trenching and blowing snow etc. P.S. We share a cool first name! -wingspar (Shane)</p></blockquote><p></p>