As mentioned google NAVEDTRA 14217 and 14218. They are Navy Training manuals are are very good. 14217 is more repair/adjusting and 14218 is more operation.
One thing that I am finding out with repair parts is that the current quality of parts is low compared to originals. I tried the $5 feet an they were junk (cast pot metal with HEAVY gooped on chrome). Found an original Singer foot for $20 and its far superior (milled and blackend like the originals).
Timing my 111W was dead simple. Make the machine look like the book.