I am just thinking. With their own seperate pump. They have set up a new suction port,from the tractors resivor. To the pump,then up to the distribution block on the arm. The filter has a bypass line besides the return line. These two hoses have to go back to the resivor. That's the reason for the return filter also. The new circut will not contaminate the tractors resivor. I wonder how much heat this would put into the tractor system. May have to also add oil cooler. I still like the whole idea.