Yesterday went out to use my JD 755 and after warming it up it just barly got the blade picked up and then quit all together. Power steering as well as forward and reverse not working. Oil level ok. Hydro filter never warmed up. Changed the fluid 2 years ago when I got it as the hydralics seemed a little slow to get going. I found the screen was in need of cleaning. New fluid, filter and all was well till yesterday. Thought I'd ask some others out there what they may think it is. Hate to dump all the fluid for nothing but thinking maybe the screen is pluged agn. Good Day................