It could be a number of things or it could be something as simple as a linkage adjustment. Why not call your local Bobcat dealer and ask them for some direction on things that you can check. I have found most Bobcat dealers to be very helpful.
Good luck,
Ken /forums/images/graemlins/smile.gif
The linkage between the steering levers and the pintle arms on the hydro need adjusting. It is not hard to do but it would be easier to look at the service manual at your local dealer than for me to explain it.