I know it's too late BUT never ever ship a machine with the wheel on it!The slightest little hit at an angle to the wheel puts alot of force on the sfaft it & will bend it everytime.Many times UPS refuses to pay a claim like this IDK what Fed Ex will do since we don't use them.Are both of the screws loosened on the hub?Take both screws all the way out & use a screwdriver holding onto the rod under the top cover & you should be able to spin the wheel while pulling towards you should spin it off.Once you get it off get a thick wall piece of pipe with an inside diameter of the shaft & you can straighten the shaft,you'll need to find the high spot of the bend ,put the pipe on bend it down,put the wheel back on,spin it to check the wobble & keep repeating the process until it's straight,I've fixed many this way.It's alot easier than pulling the shaft.