Ok 89 trooper had a problem with the lock nut that goes on the hub nut, and i need to replace the locking nut, first question how does that locking nut keep the hub nut from backing out

2nd questions, doesn anything look wrong when i take this apart? The p.o had this apart before me and im not possitive what it is supposed to look like.

what are all the pin that came out that are in the last pic? is that wheel bearing?

if u see anything in the pic let me know what u see, im so lost here






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