I need to replace the seal from the hydraulic pump, as I have lots of oil in the crank case. So this is supposed to be relatively easy, in theory, but I sure can't seem to get the thing off. I've removed the supply and return lines, and have taken out the 3 bolts and the 1 nut from the stud, the pump slides backwards, but the plate on the back of the pump hits a welded on nut near the shield attached to the bell housing. The pump needs to slide back about 1/4 inch to fully come off of that top/back stud. Any thoughts????