We may have found other answers which could help you.
Click here for Touch Tronic Machine
Singer 188K1 presser bar stuck?
1965 Singer 275k sewing machine foot pedal?
What size needles can I use for my Singer 39a3?
Singer 201 went bang , smelt and now won’t work?
Engine revving up ?
the thread is bunching on underside of fabric it looks like birdnest?