I believe you have to flip the machine on it's side and loosen a certain screw in order to lower the feed dogs, at least that is what my manual states. I also found lots of info through a Google search on the machines, lots of folks have blogged about their 15-91s and how to provide maintenance etc for them. I learned to sew on a Featherweight when I was 6, then my Mom traded up to an Touch-n-Sew in the mid 1960s. I made my prom dress on that machine oh so long ago!
Originally Posted by
jlm5419
My 1935 Singer 15-91 does not have the model number on it. According to the manual, the feed dogs are supposed to drop, but mine do not. Maybe they need some Triflow? At any rate, reducing the pressure on the presser foot and setting the stitch length to zero allows for free motion quilting, so it's no big deal.