I've been crazy busy at work and haven't made it into my sewing room, but as soon as I do i'll locate the papers I have from the class I took.
I just realized from your profile that your in VA. the class I took was at Jenny Beyer studio at Great Falls, Not sure where in VA you are, but it was a pretty informative class if you get the chance, it was worth the $$.
Hi Jay: I took a class on how to clean my old singer. I have all of the materials that I got there. It was basically getting all the gunk out of the mechanisms under the machine using an "orange stick" looks a bit like a bamboo skewer, but thicker and sturdier. I'm willing to share the information I have. I'd have to scan it when I get home and send it via e-mail.