I have had two scags that had hydro problems in warranty. The pumps replaced on one and both pumps and wheel motor on another. I had to have a third unit resealed during year three. I got a fourth unit a TT that needs to go in for leaking pump soon. Not in warranty. On the other hand I am pretty happy with scag. I think high temperatures are the problem so we are going to change fluid at 400 hrs.