Was going to reply, but cyrush covered everything I was going to suggest. Only thing I could mention in addition is to make sure you don't have air in the system. Try turning the wheel lock to lock several times and see if the steering improves. If you have a leak by the cylinder, it can suck air and make the steering soft. Also check your hydraulic system. If it is low on fluid or the filter is plugged (or the pump bad) it will affect the steering. My 574 wanders all over the place right now, but all of my drag link ends are shot on the front. That's on the list of things to rebuild this winter.
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