Hi 
Hour hands are normaly just a push fit as you say, you can buy a tool to remove them but it can be done with a pair of screwdrivers. Use a thick piece of card to protect the dial, cut a “V” in the card and slide it under the hand and then put the screwdrivers under the flange of the hour hand directly opposite each other and twist them in the opposite direction to each other. Just be gentle and look for movement as you do it, if you see the hand start to move up you know you are ok. I have not yet come across hour hands being held on by any other method but you never know!
Hope this helps.
Paul.
