JUKI DDL-8700B-7 - 21. Needle-to-hook relationship; 22. Height of the feed dog

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To adjust the height of the feed dog :
1) Loosen screw ❷ of crank ❶.
2) Move the feed bar up or down to make adjust-
ment.
3) Securely tighten screw ❷.
If the clamping pressure is insufcient,
the motion of the forked portion becomes
heavy.
Adjust the timing between the needle and
the hook as follows :
1) Turn the handwheel to bright the needle bar
down to the lowest point of its stroke, and loosen
setscrew ❶.
Adjusting the needle bar height.
2) Align marker line A on needle bar ❷ with the
bottom end of needle bar lower bushing ❸, then
tighten setscrew ❶.
Adjusting position of the hook a.
3) Loosen the three hook setscrews, turn the
handwheel and align marker line B on ascending
needle bar ❷ with the bottom end of needle bar
lower bushing ❸.
4) After making the adjustments mentioned in the
above steps, align hook blade point ❺ with the
center of needle ❹. Provide a clearance of 0.04
mm to 0.1 mm (reference value) between the
needle and the hook, then securely tighten set-
screws in the hook.
If the clearance between the blade point
of hook and the needle is smaller than the
specied value, the blade point of hook
will be damaged. If the clearance is larg-
er, stitch skipping will result.
0.75 to 0.85 mm
21. Needle-to-hook relationship
22. Height of the feed dog
WARNING :
Be sure to turn the power OFF before the following work in order to prevent personal injury due to
unintentional starting of the sewing machine.
WARNING :
Be sure to turn the power OFF before the following work in order to prevent personal injury due to
unintentional starting of the sewing machine.
❶
❷
0.04 to 0.1 mm
❷
❸
❹
❺
A
B
A
B
a
❶