Class 99 & 99K
To Replace the Bobbin
Hold the bobbin between the thumb and forefinger of the left hand, with the thread leading on top from the right toward the left, as shown in
Fig. 18.
Place bobbin into the bobbin case and draw the thread into the slot 1, Fig. 19 in the bobbin case, as shown.
Draw the thread backward between the bobbin case and the tension spring until it reaches the notch 2, Fig. 20, then pull the thread toward the right as shown in Fig. 20.
When closing the slide, place thread up through slot 3, Fig. 21 as shown.
FIG. 18 Replacing the Bobbin
FIG. 19 Threading the Bobbin Case
FIG. 20 Bobbin Case Threaded | FIG. 21 Under Threading Completed |
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