SINGER W1630 - Manual (Page 11)

IN S E R T IN G B O B B IN C A S E IN T O S H U T T L E R A C E
1. Raise needle to its highest position, pulling
thread to the front, open the latch of bobbin
case and hold it.
2. Holding latch open, place bobbin case onto
centre pin in shuttle and release latch. '