Hi Bowhunter.......welcome to TFF.
I've looked all over the internet and haven't been able to find a schematic or exploded view & parts list for the IJ Sealed Eight.
However.....keep checking back. Our resident expert on Iver Johnsons, Bill Goforth literally "wrote the book" on them: http://www.ajarmsbooksellers.com/cgi...rms/12624.html
He should be along soon and can answer any and all questions you have about your revolver.