typical TW1-2B - Installing and Uninstalling the Hook; Installing the Hook Stop Bracket; Installing the Feed Dog

A
B
C
1.1~1.3mm
1.2~1.5mm
B
C
A
D
E
B
A
1.5mm
A
-9-
Lift the needle bar to its highest position; remove
the needle plate, needle and bobbin case. Loosen the
bobbin case holder bracket screw (C), and take out
position bracket (A). Then loosen the set screw (B)
to make the rotating hook can be turned freely on its
axis. Turn the balance wheel to raise feed dog
support. At this time, take down the rotating hook
slowly while turning it to keep away f om the feed
dog support. Installing the hook can be done in
reverse sequence.
The projecting flange of position bracket (A)
should be engaged in the notch of the bobbin case
holder. And the clearance between them should be
1.1 1.3mm.
r
.
.
Lift the needle bar to its highest position; remove
the needle plate, needle and bobbin case. Loosen the
bobbin case holder bracket screw (C), and take out
position bracket (A). Then loosen the set screw (B)
to make the rotating hook can be turned freely on its
axis. Turn the balance wheel to raise feed dog
support. At this time, take down the rotating hook
slowly while turning it to keep away f om the feed
dog support. Installing the hook can be done in
reverse sequence. .
The projecting flange of position bracket (A)
should be engaged in the notch of the bobbin case
holder. And the clearance between them should be
1.1 1.3mm. .
r
Before installing the stop bracket (E), loosen the
screw (D) first. Adjust the clearance between the
stop bracket and hook to keep it be 1.2 1.5mm.
And keep the elastic tension of stop spring head (C)
1 1.2mm so that the stop spring head can limit the
bobbin case effectively. Besides, please don't let the
(C) touch the (B) by adjust their position. Last tighten
the screw (D). .
Before installing the stop bracket (E), loosen the
screw (D) first. Adjust the clearance between the
stop bracket and hook to keep it be 1.2 1.5mm.
And keep the elastic tension of stop spring head (C)
1 1.2mm so that the stop spring head can limit the
bobbin case effectively. Besides, please don't let the
(C) touch the (B) by adjust their position. Last tighten
the screw (D). .
A. When the feed amount is at the max., the front
end of feed dog (A) is near the front of needle plate
slot. The gauge between them is 1.5mm. This is the
standard position of feed dog.
B. To adjust the position of feed dog, move the
feed to the front end of needle plate, loosen the screw
(A) (See Fig23b), move the feed dog support (B) in
the direction show by arrow in Fig. 23b to adjust it.
After adjustment, tighten the screw (A).
.
.
A. When the feed amount is at the max., the front
end of feed dog (A) is near the front of needle plate
slot. The gauge between them is 1.5mm. This is the
standard position of feed dog. .
B. To adjust the position of feed dog, move the
feed to the front end of needle plate, loosen the screw
(A) (See Fig23b), move the feed dog support (B) in
the direction show by arrow in Fig. 23b to adjust it.
After adjustment, tighten the screw (A). .
22. Installing and uninstalling the hook
(Fig. 20)
23. Installing the hook stop bracket
(Fig. 21)
24. Installing the Feed dog (Fig. 22,23)
20
23
22
21