Position of needle and hook
Service Instructions 171/173 - 00.0 - 01/2020 19
6.2 Adjusting the hook drive housing
Fig. 5: Adjusting the hook drive housing
Proper setting
The needle tip points to the center of the hook shaft (5).
The lower edge of the hook shaft (4) is parallel to the underside of
the throat plate.
The distance between the lower edge of the hook shaft (4) and the throat
plate support (2) is 50.5 mm.
To adjust the hook drive housing:
1. Disassemble the throat plate and the hook carrier with hook.
2. Loosen the screw (3).
3. Align the hook drive housing such that the hook shaft (5) abuts inside
the cutout of the gage (1).
4. Tighten the screw (3).
(1) - Gage
(2) - Throat plate support
(3) - Screw
(4) - Lower edge of the hook shaft
(5) - Hook shaft
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