Brother Innov-is NV4000D, Service Manual

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Adjustment Feed dog height and squareness adjustment
1. Turn the pulley to raise the feed dog to limit. (The D-cut of lower shaft B should be facing up.)
2. Adjust the vertical adjuster so that the far back tooth of the feed dog is 0.9 to 1.1 mm from the top face of needle
plate A. (Reference
1
)
3. Loosen the bolt next to the feed adjuster, and then tighten it again. (Reference
2
)
4. Adjust the bolt on the operator's side so that the feed dog is at the parallel. (Reference
3
)
(After adjustment, check that the front tooth is level with the far back tooth of the feed dog.)
Feed dog uppermost position
Needle plate
surface
0.9-1.1mm
1
2
3