You did not re-install the axle key. It is square, approximately and eighth inch by inch and a half. Without the key, the axle spins without driving the wheel. You can buy the key at most hardware stores. Go to the JD site, log in as quest, and look up the part to get the correct dimensions.
If you aren't looking for it, the part is easily lost when pulling the wheel.
Look for it where you took off the wheel?
Richard Woolson
April 2009