Steering wheel nuts are often hard to remove. Always use a socket wrench.
Use an insert between the tip of the puller and the end of the shaft to distribute the force. Don't put a (usually off-center) dimple in the end of the shaft where you will be looking at it every time you get on the tractor.
The hub is not a casting.
A little anti-sieze will help the next time it needs to come off.
