I have a 1974 mf 20 industrial. I am not sure if the 3 point hitch controls are working correctly. Hitch moves up and down with the draft control. Can get it to hold in a spot if I dial in the lever but it is a pain in the butt. The position control doesn't seem to do anything. I am not 100% sure how this system works or if it is working the way it was intended. Fresh oil and filter and had the inside rebuilt. Thanks for any help.