My John Deere 655 (3 cylinder Yanmar diesel, hydrostatic) three point hitch is stuck in the up position. It went from working just fine to not working at all. I check the fluid level and it was empty (did not register on dip stick). I changed the filter and added new HY-GARD transmission and hydraulic oil. Three point still in stuck position. When I move the lever, I can hear the arms on the three point trying to work (high pitch sound coming from rear), but, does not. I need some assistance if anyone has knowledge on this tractor.