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Assembly Procedure
23. Temporarily insert the screw (set screw, socket (CP) M 4 × 4) in the rotary hood shaft receptacle and
temporarily fasten the rotary hood shaft receptacle with the screw (screw, pan (S/P washer) M 4 × 22).
24. While the spring pin of lower shaft gear facing down and the horizontal feed can facing to the front, insert the
rotary hook so that is reference point faces to the front and tighten the screw (set screw, socket (CP) M 4 × 4).
25. Verify that there is reasonable backlash between the rotary hook and the lower shaft. (The backlash along
the perimeter should be 0.8 mm max.)
26. Attach one end of the backlash eliminating spring to the same hole in the feed base as for the feed base
tension spring and the other end to the feed base plate.
27. Secure the feed dog with the screw (screw, bind M 3 × 6).
28. Temporarily fasten the needle plate A with the M4 screw.
29. Align the mounting hole of the inner rotary hook rotation prevention bracket against the protrusion and
temporarily fasten it with the screw (screw, pan (S/P washer) M 3 × 6).
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R
R
Q
Q
Q
N
M
M
M
M
M
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R
S
S
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