Beisler 739-23-1 Service Manual - Manual (Page 11)

2.7 Bobbin case holder
Caution! Risk of injury!
Switch off main switch!
Adjust bobbin case holder only when the sewing machine is switched
off.
CAUTION!
The adjustment may only be carried out within the highlighted area 3
(see drawing).
In the area of the holder nose 1, there is a risk of breakage exists, due
to the hardness.
Instruction and inspection
The bobbin case holder is factory-aligned.
If the holder is replaced, it might however be necessary to adjust the
new holder.
Adjustment
–
Adjust position of bobbin case holder 4.
The distance between the holder nose 1 of the bobbin case holder
4 and the bobbin case base 2 must be 0.6
+0.1 mm.
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