I just purchased a 753 and the steering is very hard to control. It seems that there is a lot of travel in the levers before any reation comes from the machine, but when it reacts it is quick and hard to handle. There isn't much slow ground speed, it's either not moving at all or it's moving fast. All other functions of the machine seem fine. I looked through many many posts and couldn't find one with this issue. Any and all help will be greatly appreciated.