We have several d4 cat dozers with what we call a "3rd valve", which means it has hydraulic ports that come out the rear similar to a farm tractor. We use the auxilary hydraulics for the lift on the plows that follow behind them. A friend has a john deere 650 that he would like to add this extra valve to. My questions: what kinda of money are you going to spend for this extra valve and how do you plumb the hydraulics to it?
Chris
Chris