This is a new to me tractor. When I bought it the FEL was not working properly. I took the valve body apart but didn't find anything out of place. Maybe something is missing I don't know. Without the FEL on the 3PH and the steering works smooth and perfect. When I took the Priority valve apart there was nut on the end , a keeper for the spring , spring and a piston at the bottom with a small hole in it. The valve body for the loader appears to have some damage on the end of the spool where the handle attached. Looks like someone has hit it with a hammer and mushroomed the end some. No orings were damaged on the spool seat or where the blocks mate together. On the relief valve for the loader, the top nut was removed , inside was a spring and a piston with holes which were clear. On the bottom side where the adjustment was , there was a spring on a cone that goes into a hole. I polished the cone with a scotchbrite pad. No sign of damage to the cone or wear. Maybe this will help.
I wish I had a diagram for the hydraulic system.
I wish I had a diagram for the hydraulic system.