On my M95S Kubota Agricultural tractor, it steers but is hard to turn. It is not as hard to turn as when it isn't running but pretty hard. Quick short continuous turns of the wheel will start to make it turn like it should, but stop for just a moment and it's tight again. i checked fluid levels and made sure all other hydraulics function correctly, pulled the lines off steering box leading to front steering cylinder to make sure fluid was moving, and at recommendation of kubota dealer, R&R front steering cylinder and re-sealed it. Made no difference. does anyone have any suggestions for me? It's about 5 yrs old and has 2800 hours on it.