These have gotten lost in the shuffle of the new QB format so I am posting them right here.
Fav & Muv have made fantastic videos about old sewing machines. You most likely will so not have a sewing machine exactly like the machines in the videos, however, the cleaning principles will apply to just about any vintage sewing machine without a lot of dis-assembly. Be sure to pour yourself a nice cup of tea to enjoy while you watch these videos.
How to clean an oil a vintage sewing machine
http://www.youtube.com/watch?v=bidpJ..._order&list=UL
Don't go away, relax, pour some more tea, and stay tuned for part 2!
http://www.youtube.com/watch?v=SKR5t..._order&list=UL
http://www.youtube.com/watch?v=S43_-..._order&list=UL
the long bobbin
How to thread a vintage round bobbin sewing machine - Singer 99K
http://www.youtube.com/watch?v=lcX_4..._order&list=UL
How to remove a motor
http://www.youtube.com/watch?v=hStB5..._order&list=UL
http://www.youtube.com/watch?v=pC3Ex..._order&list=UL
How to use a Seam Guide on a Vintage Sewing Machine - 1937 Frister and Rossmann transverse shuttle
http://www.youtube.com/watch?v=EgkO5..._order&list=UL
Threading a Vista
How to adjust the Tension on a Vintage Long Bobbin Sewing Machine - 1934 Singer 128K Indian Star
http://www.youtube.com/watch?v=S43_-..._order&list=UL
http://www.youtube.com/watch?v=6wswW..._order&list=UL
How to thread a Singer long bobbin sewing machine
http://www.youtube.com/watch?v=c4PhA..._order&list=UL
How to wind a Singer sewing machine long bobbin and load the shuttle the correct way