My 2005 B7510HSD Turf Special,s Hydraulic 3 point hitch does not appear to be adjustable, by the moveable stops, at any intermediate positions. According to the manual, I should be able to move the stops at the control on the fender, and stop the drag links at any elevation desired. Mine requires that i move the lever clear down (or up) then return the lever to neutral when the implement reaches the desired elevation. Adjusting the stop, then moving the lever to that position, does nothing...I must move the lever beyond the stop position and watch the implement move down to the desired elevation, then bring it back to the stop and it will stay there. What is broken...the tractor or me???