On my mower the steering wheel just keeps turning and the wheels don't turn. From reading other posts it looks like I may need to replace the hex flange bearing, but I cannot get the stupid nut and pinion gear off to do so.. please and help is greatly appreciated

Hi,
The not is nothing but a common not, usually 7/16". Baring that you can remove the deck, raist the machine, pry off the cap and drop the entire steering shaft down out through the bottom. Seems to a #941-0656A.
Peace,
Clarke
PS There is a silicon bronze variety, also.