Hi everyone, I've been battling with my old 641 and backhoe for weeks and am finally at a loss. I've literally tried everything including swapping hoses! If I pull the lever to the left and hold it then it works fine, if I push right past the detent into continuous flow the hoses pulse but the acter just doesn't work. I'm left with the thought that the only thing left is somekind of interlock on the machine that I'm unaware of which is preventing hydraulic flow. Is there such a thing or should it just work when the right hand lever is pushed past the detent?