Pfaff 441-O - Page 20

12.3 Right bobbin case opener
Correct Whenshaft 1ofthe rightbobbin case opener isat itsrear pointofreversal (see arrow),
setting: as seen inthe direction of feed, there should be a clearance of 0.3 to 0.5 mm between
the lugof the rightbobbin case base and the rear edge ofthe needie plate slot.
12.3.1
12.3.2
12.3.3
12.3.4
12.3.5
12.3.6
12.0.2
12.0.3.
Bring the needle bar to bottom dead center.
Turn the balance wheel inits normal direction until shaft1ofthe right bobbin case opener
is at its rear pointof reversal (see arrow).
Loosenclampscrew2 ofthe connecting crankonthe right shaft1.
Reposition the connecting crank on its shaft so that there is a clearance of 0.3 to
0.5mmbetweenthe lugofthe rightbobbincase base andthe rearedge ofthe needle
plate slot.
In this position, tighten clamp screw 2, making surethatthe connecting crank isnot tilted.
Checkthis adjustment(see "Correctsetting").
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