5
Mechanical adjustment
TOP TENSION
NEEDLE BAR HEIGHT
TO CHECK:
When the tip of shuttle hook meets the left side of the needle in ascending travel of the
needle from its left and lowest position, the distance between the top of the needle eye and
the tip of the shuttle hook should be in the range of 2.9-3.5 mm.
ADJUSTMENT PROCEDURE:
1 Remove the face cover. (See page 4.)
2 Set the pattern selector dial at " ".
3 Open the shuttle cover.
4Remove the shuttle race ring.
5 Turn the handwheel toward you until the tip of the shuttle hook meets the left side of the
needle.
6 Loosen the lower shaft crank arm setscrews (A).
7 Adjust the height of the needle bar by moving the needle bar upward or downward
without turning it.
8 Tighten the setscrew (A).
9 Attach the shuttle race ring.
C
E
D
B
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