JD 5105 3 pt hitch stuck up (update)

Started a new thread with problem in title so maybe others can find in future. I got it working again today. Remove the seat assembly.(15 mm socket). Tie or block the hitch up as when taking apart a lot less oil will come out. The rate of drop adjusting T handle is on a cap on the front side of the rockshaft housing. Remove this cap by removing the 3 allen screws. ( 5 mm wrench size ) After cap is off in the lower hole there is a spool valve. It has a hex head you can grab with pliers and wiggle it out. This spool has another spool inside of it and a spring in the bottom behind it. Mine the inner spool was stuck ? I stood it on end hex head down and then tapped on the end of the inner spool with punch and hammer. Oil squirted out and it then popped up and would move in and out. Pulled this all apart cleaned and oiled it up then put it all back together. Seems to work fine now as it did before. Not sure why it quit working ? everything looked clean ? But I had left 3pt in the up position without using it for several years. I'm going to try leaving it in the down position and run it up and down everytime I do use the tractor. I mainly only use the loader.