I just bought a JD 717A z-track. I have only mowed a couple times with it so far. After mowing a small field ( about 45 min mowing time) that was real dusty I decided to wash it off. I blew everything off with the air compressor. When I sprayed the wheels off with water I noticed that the center hub of the wheel motor was very hot. So hot that it boiled the water off as soon as it hit it. Is this normal for a z-turn? I checked the brakes, but they did not seem to be draging, and everything operates well when mowing. Thanks for any help.