Had water in my transmission oil. 3 pt hitch would not work below freezing. I changed the oil. (Partial fix) then I changed the filter for the 3 point hitch which is to the left of the pto shift lever cover (bottom right of picture). My 3 point will now lift with no load but will not lift a load. Questions.... Is that pump located in front of that filter assembly? can I service it from the top if I remove that assembly or does the tractor have to be split as in the left side of that picture? Or is the problem more likely to be with the piston assembly not sealing and not allowing the system to build up pressure? Any thoughts?