We may have found other answers which could help you.
Click here for Zig Machine NeedleThe thread loops under the fa?
Presser foot level, needle and thread guide have fallen out?
Singer zigzag 457 Stylist not threading bobbin/making stitch?
How do fill a bobber?
Sewing machine starts on its own?
How can I mend my Frister & Rossmann sewing machine?