I was reading a problem Jeff Stephens was having with his tractor. My problem is similar. This is my first time on the site. My 3 point hitch will not go up or down with or without a implement attached. This started last fall while dragging the driveway. I have changed all filters and hydraulic oil. The filter screen was a mess. The pump is ok it lifts the loader and I have pressure to the shut off valve under the seat. At first the shut off valve only had fluids coming through the ports(right of the handle) looking at it if you were seated. No fluids at all from left side of shut off valve. I purchased a new shut off valve unit. New unit works, still no lift. The piston located in the hydraulic lifting system is in place. I'm getting fluids through the ports where the handle mounts. Sure could use some help. Thanks Jeff Sindlinger