Hi, hopefully someone with experience of gear pumps can give me some advice! We've designed and manufactured a pump with mod 6 gears, for high flow rather than high pressure. However, when we increase the speed beyond 300 rpm the pump seizes and galls the housing. There's not a tremendous amount of backlash between the gears, and the theory I'm working on is that the oil can't escape quickly enough from the closed pocket created as the gears come into mesh. There are wells in the closing/bushing plates that leave a narrow piece of land just where the gears mesh (copied from an automotive oil pump), but my question really is, how wide should this land be in relation to the gear mod? Any help most gratefully received!