Brother CB3-B917 Service Manual page 26

322s
323s
C (TQx1)
D (TQx7)
324s
326-1s
0.03 – 0.08 mm
326s
12. Remove the loop spreader
guide
13. Place the set screw collar
so that the set screw
the looper
will go, and then provisionally tighten the set screw
< Adjustment of the needle and looper >
(1) Raise the needle bar
align the second reference line C from the top of the
needle bar with the bottom of the needle bar metal. (For a
TQx7 needle, use the bottom reference line D.)
(2) Turn the looper setting shaft
looper
gently contact the looper setting shaft
spreader groove cam
325s
< Adjusting the clearance between the needle and the looper
>
(1) Move the looper
clearance between the looper
0.08 mm when the end of the looper
the needle center.
CB3-B916A/B917A
3. ASSEMBLY AND ADJUSTMENT
and the loop spreader
.
onto the looper setting shaft
is aligned with the hole, push
onto the looper setting shaft
from the lowest position and
end is aligned with the needle center. Then
and tighten.
back and forth to adjust so that the
and the needle is 0.03 –
as far as it
.
to adjust so that the
to the loop
is aligned with
20