Pfaff 441-O - Page 19

12.2 Left bobbin case opener eccentric
Correct
setting:
When the take-up lever Isat bottom dead center, shaft6 of the left bobbin case opener
shouldbe exactlyat itsfront pointofreversal, as seen inthe direction offeed (see arrow).
12.2.1 Loosen screw 4 in the left bobbin case opener eccentric, which was tightened previously.
12.2.2 Turn the balance wheel to bring the take-up lever to bottom dead center.
12.2.3 Turn the left bobbin case opener eccentric 5 on its shaft until shaft 6 is exactly at
its front point of reversal (see arrow). Inthis position, tighten screw 4 securely.
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From the library of: Superior Sewing Machine & Supply LLC