Carol, that link is a file on your computer that you probably got at
https://www.singer.com/sites/default...%20Machine.pdf I think the pictures are not very good but the text is all English.
diamondee, a couple of other good sources (not free) would be
http://store.tandtrepair.com/631gom.html and
https://www.tias.com/download---pdf-...df-643075.html
Janey - Neat people never make the exciting discoveries I do.