I am not sure about this being the same column as a Cub , but i am thinking i saved this because someone said a Cub is the same. Hopefully someone will come along and verify if a Cub power steering is the same. Don't tear your column apart until someone verifies this .
I would also locate and buy a SERVICE MANUAL for your tractor. It has pics and info on doing this.
http://www.mytractorforum.com/showthread.php?t=208848