I just gotta 440 with a Perkins. and when I am going top speed I can't turn either direction (not even a little), It just makes a bad grinding noise. Its hard to tell where its coming from. There are no other driving/ steering problems. The second problem is it is leaking a lot of hydraulic fluid after some use. It is coming from underneath. I looks like it may be coming from a clear tube. Could it be some kind of overflow? Lastly, where can a guy find information on these old things? I am also looking for manuals...