Tips:
Pay attention to how the hubs are assembled. Most people have problems with reassembling them the first time or two.
I use brake cleaner and an old toothbrush to clean the hubs up good. I fully disassemble them (even take the lock-out dial out).
If you take the lock-out dial out....don't lose the little ball and spring...they will sometimes go shooting out, when you remove the lock-out dial. Be sure to lube up the ball and spring before reassembling...it helps hold them in place, plus make the dial turn easier.
Be careful with the o-rings, there is one between the lock-out hub body and the wheel hub, and one between the lock-out dial the the hub body (I think).
I have used both wheel bearing grease and regular 30 wt. engine oil to lube them. Basically, you just need to keep them lubed enough to keep them from rusting up. The wheel bearing grease tends to get a little stiff (making the hub internals "sticky" in cold weather). The 30 wt. engine oil tends to seep out a little around the dial face making it a little oily. So it is kinda up to you on which you prefer to use.