SINGER WK-100 - Manual (Page 6)

Fig. 8
5. WINDING BOBBIN
1. Hold the fly wheel (A) Fig. 7 with the left
hand and turn the cluch (B) Fig. 7 toward
you to release the clutch. By doing this, the
fly wheel turns freely.
NOTE :
If the needle moves, the clutch is
not completely released.
2. Place thread on the spool pin and guide the thread through the upper thread
guide (C) Fig. 8. Then bring the thread across the machine and under the
bobbin winder thread guide (D) Fig. 8.
3. Wind the thread several times on the bobbin (E) Fig. 9. Now place the bobbin
on the spindle (F) Fig. 9 of the bobbin winder.
note : The lock spring on the spindle must fit into the slot in the bobbin.
This is done by holding the rubber ring (G) Fig. 9. with the right hand and
turning the bobbin with the left hand until the lock spring slips into the slot
of the bobbin.
4. Push the cover (H) Fig, 9, of the bobbin winder down until the rubber ring
(G) Fig, 9 is brought in contact with the fly wheel.
5. Turn the fly wheel slowly, toward you; then operate the machine as in sewing.
When the bobbin is full, it will stop.
6. Remove the bobbin from the spindle, then re-engage the machine by holding
the fly wheel with the left hand and with the right hand turn the clutch away
from you.
NOTE : Make sure you tighten firmly.