I just bought a used hydro, and while I am operating it, first off the brakes don't work. When I put the brakes on it still goes forward, backwards, left and right. It just kinda depends on what it wants to do. Also when I am turning the mower it will be turning just fine, and then all of a sudden it will turn sharply in the way that its moving. This obviously is not "normal", is there an easy fix, I am waiting for the dealer to call me back now. This is partly my fault for not testing it in the shop, I bought it and they put it on my trailer. The owner of the shop I bought it from is a friend of mine, so I am not worried about getting the shaft. Any help would be appreciated, thanks.