Torch, grinder, Jack hammer, then a chisel. I can't see you spending more than 3 hours total on this. It's a complete housing. Sealed bearings tend to fail randomly. I think this set-up should last a few more years. I would just buy another set as a backup incase they other side decides to go out later.
Long time we met or spoke. How are you and howz your wife.
I was thinking to buy another one as well as a back up. If its rusted it might take 3 hrs i guess, if not in 2hrs