Pfaff 1540 - Manual (Page 65)

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33. Adjustment of bobbin case position finger
Requirement:
The clearance between the position finger and the bottom of the groove in the bobbin case base must be
0.7 mm.
Check:
z It must be possible to insert clearance gauge (00-880133-01) with ease but without play between the
position finger and the bottom of the groove in the bobbin case base (fig. 68).
Adjustment:
z Loosen the two screws 114.
z Insert clearance gauge.
z Press bobbin case position finger 113 against the gauge at an angle of 90 degrees.
z Tighten the two screws 114.
Cross-check:
z As described under "Check".