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8. How to remove and attach the needle bar unit
Preparation: Remove the needle threading system unit.
1. Remove the thickness sensor wire for needle thread
adjustment wire attached to the presser bar.
2. Remove the right LED code.
3. Remove the presser foot lifting arm link set screw.
（Be careful, the spacer on the outside of the screw.）
4. Loosen the 2 set screws for the needle threading positioning cam and
remove the needle threading positioning cam.
5. Remove the 4 needle bar unit set screws.
6. Remove the needle bar unit.
＊Attach the needle bar unit from the end of the removed procedure (6.→1.).
＊Adjustment of the needle threading system position cam.
See page: 5. How to adjust needle threading system position.
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