The hub is a sealed unit bearing. The bearing itself doesn't get replaced but the entire hub assembly does. 3 12 point 13mm (can be 12mm) bolts hold the hub to the spindle. I believe it is a 34mm (or 36mm)socket for the hub nut. If it has never been replaced, the hub kind of seizes on the knuckle. You can do 2 things to remove it.
Put some padding on the spindle and slip a piece of pipe about 4' long over the spindle. Gently pry up and down and side to side and it normally just pops out.
Another trick is to tap on only 1 of the 12 point bolts to pop it out. Probablem is is that you might damage the bolt so having a spare one is a good idea if you do it that way.
Oh the 3 bolts that hold the hub to the knuckle get torqued to 75 ft.-lbs. and the big nut gets 175 ft-lbs.
Hope this helps and post up if you need any other info.
P.S. use anti-seize around the perimeter of the new hub it will make any future servicing easier.
