You have not yet memorized the entire contents of the two mentioned books???
What do you do in your spare time?
In your Smith & Wesson Shop Manual, go to Book II, pages 61 through 64. It lists various sad conditions that can happen to a S&W revolver, with proposed solutions. That may get you started, but beyond this there isn't a clue. Also the book doesn't cover the more recent changes, in particular the MIM lockwork. I've found it interesting that no one has written a shop manual to cover these revolvers, and I don't intend to be the one who does.
I haven't looked, but I understand that S&W will download current owner manuals in .PDF format, and maybe if they did things right, an exploded view drawing with part numbers might be included.
Some part numbers for the various dash numbers within a particular model are listed in Brownells' and Numrich Gunparts' print catalogs.
You aren't supposed to be buying newer guns anyway....
The Old Fuff of course, won't touch a gun unless it pre-dates automobiles...