Hi Joe, mine is press fit also. I think they took it off to paint and loosened it up just a bit so it won't stay on. The Red Locktite sounds like a good choice, I'll go look for some this weekend. I already have denatured alcohol and thought I should clean it first. Thank you for the advice. I haven't had this issue before.
Kitsey: I found it on craigslist for $140. The ad had just been posted and jumped on replying that I wanted it. The ad said her name is "Laverne" but I havn't decided if I will change it. I told the seller that she would know me when I drove up in a purple truck; my husband says it is "just you" (he enables my collecting). I took her to a quilt class last weekend and she sewed beautifully (and got a lot of notice among all of the original black machines).
Kim