Adjustment
12 - 18
81-076
418 - 419
438 - 439
81-075
● Loosen screw 3.
● Swing the bobbin case opener to the right and remove the hook.
● Loosen screw 2 and loosen the draw key underneath it by lightly tapping the head of
the screw.
● Screw on the hook bearing bracket adjustment gauge.
● It must be possible to read the numbers "438-439" from the front.
● Move or turn hook bearing bracket 4 in accordance with the requirement.
● Tighten screw 2.
● Adjust the bobbin case opener in accordance with subsection 12.05.21 Bobbin case
opener position.
Fig. 12 - 17
12.05.16 Hook bearing bracket
Requirement
The hook shaft must be touching the hook bearing bracket adjustment gauge 1 at the top
and the side.
1
3
1
2
4
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