Wow! Appreciate all the input! I had tried universal hydraulic oil from Napa, but it seemed to foam worse than the 10w40 that was in there first. I thought maybe the 5w would flow faster and be less likely to foam. I still am not sure where the returned oil goes when an adapter block like I made is used. As per advice I made a block to replace the 3 bolt cover on the forward right side of the hydraulic/ trans cover casting where the manual says to drain the hyd oil when you change it. This cover has 2 ports under it. The block I made separates the pressure coming from the pump and routes it to my external valve which has a relief valve and a return hose that I routed to the other port, assuming this returns pressure to the internal valve to run the 3 pt hitch lift. Maybe this is not the right idea? Should I be routing the return somewhere else? Will the 3 pt lift work if I do?