That hub assembly should slide straight off the load tube. Sometimes it requires a little "persuasion". I like to bolt a piece of heavy chain to one or two of the threaded holes where the axle shaft attaches, and use a "whiplash" motion to yank the hub off the tube. Once the hub is off, it's a fairly simple job to pry the seal out and remove the inner bearing. I seem to remember one of the medium duty Chevy/GMC truck rear hubs that has a bearing race retained in the hub by a big snap ring. It takes a special pair of snap ring pliers and a few colorful vocabulary words to get that ring out!
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!