I havent used this tractor for about 6 months, and tried it out today and cant get the loader to work. I checked the fluid and it was low so I added more. but it still wont lift. Its just a genral purpose loader and has a new valve to control lift . but Im just not getting any pressure at the valve or at the 3 point or power steering , Which works only on occasion. could the hydrolic pump go bad just sitting or is there a filter plugged some were I dont know about? Id be happy with any ideas.