typical GC0323 User manual

G C 0 3 2 3 /G C 0 3 2 3 -D 2
LOCKSTITCH SEWING MACHINE WITH TOP AND BOTTOM FEED
MANUAL
Adress: str. Teatralnaya 2 / 202A,
Dnipro, UKRAINE
Website: www.Overlock.com.ua
Phone: [phone]
Mail: [e-mail]

ADD: WANPING TOWN, WUJIANG CITY, JIANGSU
PROVINCE, CHINA
TEL: [phone]
FAX: [phone]
POST. CODE: 215223
Http://www.typicalwpchina.com
E-mail:[email protected]
TYPICAL SEWING MACHINE WANPING MACHINERY CO.,LTD.
Please don't adjust and repair the machine by non-professionals,except adjusting stitch.
Specifications subject to change without notice

1.Brief introduction 1
2.Machine specification 1
3.Installing the belt 1
4.Adjusting the position of needle bar 2
5.Installing the knee control mechanism 2
6.Lubrication 3
7.Adjusting the lubrication of rotary hook 3
8.Oil pump adjustment 3
9.Cleaning the machine 4
10.Instruction of controlling box and the motor 4
11.Installing the belt cover 5
12.Winding the bobbin thread 5
13.Installing the needle 5
14.Threading the needle thread 6
15.Adjusting the thread tension 6
16.Adjusting the presser foot pressure 7
17.Adjusting the feed dog 7
18.Adjusting the inside and outside foot 8
19.Adjusting the feed dog timing 9
20.Adjusting the trimming device 9-11
1.Casting mechanism 12-13
2.Thread take-up mechanism 14-15
3.Lower feed mechanism 16-17
4.Stitch length adjustment mechanism 18-19
5.Upper feed mechanism 20-21
6.Walking foot mechanism 22-23
7.Presser foot mechanism 24-25
8.Thread trimming mechanism 26-27
9.Reverse stitching mechanism 28-29
10.Lubrication mechanism 30-31
11.Accessories 31-33
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Parts Manual
Operation Instruction
Contents

Operation Instruction

1
GC0323 GC0323-D2
15mm（ ）
①
1
1. Brief introduction
This series of machines adopt link feed, thread take-up
lever and rotating hook looping, which form the 301
stitch. Extra long machine head ensures a special
operation room. Extra long needle bar stroke and large
amount of alternation presser foot lifter ensure
excellent sewing capacity.
This machine adopts auto lubrication system and runs
smoothly with low noise and little vibration. This
machine is widely used in manufacturing leather
products such as suitcase, cushion, tent , sofa and
canvas, heavy weight decorative, fabric, etc.
Model
Applications
Max sewing speed
Max stitch length
Needle bar stroke
Thread take-up lever stroke
Lifting amount of presser feet
Climbing device
Feed dog height
Needle
Presser foot
lifting height
Hook
Lubrication
Thread trimmer
Reverse stitch
Medium & heavy weight materials
2200 s.p.m
9mm
37mm
73mm
2.0-5.5mm
Dial type
1mm
DP×17 23#
8mm
16mm
Large lubrication hook
Automatic lubrication
no yes
yes
3. Installing the belt (Fig.1)
2. Main specifications
1. Using V-belt.
2. Adjust the tension of the belt. Change the height
of the motor by turning the adjusting nut ①, press
on the center position of the belt and there should be
a slack of 15mm.
If the tension is too weak, the sewing speed will not
stable or the needle can not stop in the proper
position when the machine runs at low speed.
If the tension is too strong, the bearing of the motor
will be damaged easily.
Approx. 1kg force

①
A
B
2
3
①
②
③
④
2
4. Adjusting the position of needle bar (Fig.2)
5. Installing the knee control mechanism (Fig.3)
1. Adjusting the “needle up” position
When depressing the trimming pedal, the needle
bar should stop at the “needle up” position. If
the mark error is more than 3mm, adjust it as
follows:
(1) Turn off the power.
(2) Hold the machine pulley, insert the probe unit
the adjusting plate① into the two holes A and
press on it by hand, then turn the machine
pulley until the first marked point on the
machine pulley is aligned with the marked point
on the arm.
(3) Start a running test.
2. Adjusting the “needle down” position
When the pedal returns to the middle position, the
needle bar should stop at the “needle down ”
position. If the mark error is more than 3mm, adjust
it as follows:
(1) Turn off the power:
(2) Hold the machine pulley, insert the probe unit
the adjusting plate ① into the two holes B, then
turn the machine pulley until the third marked
point on the machine pulley is aligned with the
marked point on the arm.
(3) Start a running test.
3. After confirm, connecting the power plug.
1. Pull out the two hinge shafts ①, and then install it
properly;
2. Install the bell connector② onto each shaft;
3. Connect the bell connectors with the connecting
rod③;
4. Install the bent bar④ onto the left bell connector.
The first mark while Needle up
The third mark black Needle down
Mark
Mark (white)
Front
Rear
Mark (black)
The third mark
The first mark

3
4
5
H
L
OIL
A
B
①
①
6
①②
6. Lubrication (Fig.4)
7. Adjusting the lubrication of rotary hook (Fig.5)
8. Oil pump adjustment (Fig.6)
Fill the oil until the oil level reaches the mark A of
the oil reservoir.
During the operation, check the height of the oil
level frequently.
If the oil level is lower than mark B, fill the oil.
Note: When running the machine, examine the
lubrication situation through the oil window ①.
Adjust the lubrication situation of the rotary hook by
turning the screw①.
● If tighten the screw, the oil amount will be at the
max.
● If loosen the screw, the oil amount will be at the
minimum.
Note: After adjustment, the machine should be
running at least 30 seconds, then check if the oil is
leaking into the rotating hook.
Hook
Decrease Increase
Adjust the oil pump as follows:
The adjusting plate① should fully cover the oil
by-pass hole②, If the oil amount need to be reduced,
then open the by-pass oil hole② suitably.

4
7
①
②
③
②
8
①
②
9. Cleaning the machine (Fig.7)
10. Instruction of controlling box and the motor (Fig.8)
Cover
Clean the feed dog①, the rotary hook② and the oil
pump③ periodically.
1. Do not press on the pedal when running the machine.
2. Turn off the power when leave the machine.
3. If the power is turned off or is down when sewing,
thereby the detent will appear mistake.
4. When operating the machine, the cover of controlling
box should be closed to avoid error operation.
5. The controlling loop should be examined by the
avometer to protect the semiconductor parts.
6. The off the power when tilting back the machine or
touching the needle.
7. The three phase machine must be connected to the
ground with the ground cable (green wire).
8. When operating the switch of the controlling box,
first turn off the power, then open the front cover ①,
if the bottom cover ② need to be opened, please wait
about ten minutes after turning off the power as the
inside of the box still maintains upper voltage. (It's
important to release the inside energy.)
9. When using the motor, be sure to keep away from
the high frequency weld zone.
10. The single phase machine is suitable for 15A, and
the three phase machine is suitable for 10A.
11. The probe unit has a smooth and bright surface.
Avoid the dirt, oil or other objects sticking onto the
probe unit. When pulling out the machine pulley and
adjusting it, if there is dirt, clean it softly and avoid
scratching the surface. Note: prevent the oil leaking
into the gap of the surface of the plate.

5
9
10
①
11
11. Installing the belt cover(Fig.9)
12. Winding the bobbin thread (Fig.10)
13. Installing the needle (Fig.11)
Both the sewing machine and motor should be
installed with belt cover for safety.
Thread tension:
When winding the nylon or polyester thread, the
thread tension should be weak.
One-side winding:
The thread guide bracket should move to the place
where the winding amount is at the minimum.
Winding amount:
If the bobbin is wound excessively, loosen the
adjusting screw ①; if the bobbin is not wound
enough, tighten the screw①.
Thread tension
adjusting screw
Winding amount 80%
Note: Turn off the power before installing the needle.
Insert the needle to the bottom, tighten the screw,
then keep the long groove of the needle toward
to the left.
Note: When reverse sewing with polyester thread, if
the thread is breaking, turn the long groove of
the needle to the front, which may avoid the
thread breakage. In general, do not turn the long
groove of the needle to the back.
Long groove to left
clearance

6
12
13
①
②
14. Threading the needle thread (Fig.12)
Raise the thread take-up lever to its highest position,
and then thread it as shown in the Fig.
15. Adjusting the thread tension(Fig.13)
1. Needle thread tension
(1) Adjust the needle thread tension with reference
to the needle thread tension.
(2) Adjust the needle thread tension by turning the
thread tension nut①.
As to some special materials, adjust its tension by
adjusting the thread take-up spring.
2. Needle thread tension
Adjust the needle thread tension by turning the
screw②.
Tighten
Loosen
Tighten
Loosen

7
14
15
1.0mm
①
②
⑥
③
④
⑤
⑦
16. Adjusting the presser foot pressure (Fig.14)
17. Adjusting the feed dog (Fig.15)
1. The pressure of the presser foot should be adjusted
with reference to the nature of the sewing material.
2. The pressure of both the inside and the outside
presser foot can be adjusted.(The adjusting screw has
been adjusted before delivery as shown in the Fig.)
3. The sewing pressure should be adjusted to a minimum
of need.
Presser foot pressure
Weaken Strengthen
Walking foot pressure
Weaken Strengthen
1. Height of feed dog
(1) The feed dog① should be 1.0 mm higher than
the surface of the needle plate②, this is the standard
height.
(2) Adjusting the height of feed dog:
1) Loosen the screw④ on the feed dog lifting crank③,
then move the feed dog carrier ⑤ up or down;
2) After the adjustment, tighten the screw④.
2. Adjusting the obliquity of the feed dog
(1) Loosen the screw⑦;
(2) Turn the eccentric shaft⑥ with the screwdriver;
(3) After the adjustment, tighten the screw⑦.
The mark position of
the eccentric shaft
Feed dog
Horizontal
Up
Down
Standard
The front lifts
The front falls
Mark

4
5
.
4
3
.
5
3
5
5
.
5
2
.
5
2
16
2.0-5.5mm
8mm
（a）
（b）
（c）
（d）
（e）
8
①②
③
④
⑤
4
5
.
4
3
.
5
3
5
5
.
5
2
.
5
2
6
7
8
9
A
18. Adjusting the inside and outside foot (Fig.16)
1. Adjusting the alternating movement (Fig.a, b)
(1) the amount of alternating movement can be
adjusted in the range of 2.0-5.0mm
(2) Adjust the alternating movement of the presser
feet by the dial A
(3) The dial ① on the upper cover is for the locking
dial A.
Note: Adjust the lifting amount from small to big,
first turn the dial ①, then turn the dial A; on the
contrary, first turn the dial A, next is dial ①.
2. Changing the balance of the alternating movement
of the inside and outside presser foot (Fig.c)
(1) Increase the lifting amount of outside presser
foot ② and decrease the lifting amount of inside
presser foot ③.
① Remove the rubber plug④ on the upper cover.
② Turn the machine pulley until the inside presser
foot ③ is lifted from the needle plate.
③ Loosen the screw⑤;
④ The spring pulls the inside presser foot downward
until the later touches the needle plate, then
tighten the screw ⑤.
⑤ Accordingly, the lifting amount of the inside
presser foot will be reduced for certain amount,
and the lifting amount of the outside presser foot
will be increased for the same certain amount.
(2) Opposite to the above situation: decrease the
lifting amount of the outside presser foot and
increase the lifting amount of the inside presser
foot.
First, turn the machine pulley until the outside
presser foot is lifted away from the needle plate, hen
loosen the screw⑤, finally, tighten the screw⑤.
3. Adjusting the outside presser foot (Fig. d)
Loosen the screw ⑥ and set screw ⑦, when lift the
presser foot lifting bar ⑧, adjust the position of screw
⑦ to make the lifting height of outside foot ⑨ from
needle plate is 8mm, after adjustment, tighten the
screw ⑦.
4. Adjusting the feed amount of the outside presser
foot (Fig.e)
The upward feed amount and the downward feed
amount of the outside presser foot are the same.
However the feed amount can be adjusted with
reference to the situation.
Loosen the nut (12) on the crank (11), and then
adjust the crank shaft upward and downward.
● Up position→feed amount→small
● Down position→feed amount→big
Needle plate
Small
Big

17
18
9
①
②
③
④
⑤
19. Adjusting the feed dog timing (Fig.17)
1. The standard position between the feed cam (left)
① and the feed cam (right) ②is shown in the Fig.
2. Open the upper cover③, and then adjust its position.
3. The feed dog (right) ② can be adjusted by removing
the rubber plug ④ on the upper cover. Under such
condition, be careful to protect the bevel gear ⑤ as
it is not easy to be found when adjusting.
The first screw The second screw The first screw
Stitch length dial
20. Adjusting the trimming device
Thread holding spring plate
Fixed knife
Movable knife
Driven crank
Solenoid Solenoid base
Spring
Trimming cam
Left crank
Right crank
Spring
Tension release wire
1.Trimming mechanism (Fig. 18)

19
20
21
0.3mm
87.5mm
10
①
②①
②
螺母A
4.6mm
0.5mm
电磁铁安装架螺钉
电磁铁连接件固定螺钉
②
③
Knife edge
Spring Left crank Right crank
Bush
2.The relation between fixed knife and movable knife
(Fig. 19)
(1)The clearance between fixed knife ① and movable
knife ② should be 0.3mm
(2)Adjust the position illustrated by the Fig. 19,move
the bobbin case opener and adjust the holder of
fixed knife.
3.Thread trimmer cam lever shaft(Fig. 20)
(1)Install the shaft ① on the machine bed first;
(2)Install the cam lever L on the shaft ① as illustrated;
(3)Slightly turn the shaft ①, and install the positioning
block ② as illustrated.
4.Installing the trimming solenoid (Fig. 21)
(1)The stoke of solenoid
a. The standard stroke is 4.6mm
b. Turn the nut (A) to adjust the stroke
(2)Adjusting the solenoid
a.When the solenoid is active, there should be a 0.5mm
clearance between the cam lever L ③ and cam lever R
②. If need to adjust, please move the solenoid base
shown by the arrow.

22
23
A
0.5-1.0mm
1mm-1.5mm 3mm
7.5mm 5mm
B
A
11
①
0.6mm
②
①
②
②
①
②
①
5.Installing the trimming cam (Fig. 22)
(1)Align the second mark A on the machine pulley
with the Positioning Mark on the arm;
(2)Set the solenoid active and turn the trimming cam
① until the cam is touched with the roller, then
fix the cam;
(3)Set the solenoid inactive and make the cam lever
② restore to the original position, there should
be a 0.5-1.0mm clearance between cam and roller.
Positioning Mark
6.Adjusting the knives (Fig. 23)
(1)The relation between fixed knife and movable knife
The clearance between movable knife ① and needle
center is 7.5mm, and the clearance between fixed knife
② and needle center is 5mm.
(2)Adjusting the knife
Set the solenoid active, the movable knife ① will turn
rightward driven by the trimming cam. When the movable
knife ① moves to its left furthest position, the clearance
between two knives ① and ② should be 1.0-1.5mm
(3)Adjusting the trimming solenoid
A.If the thread trimming not smoothly, especially the
thick thread used, just need to increase the trimming
pressure;
B.Adjusting the trimming pressure: loosen the nut B,
adjust the screw A to get the reasonable pressure.
Driven crank

Parts Manual

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718
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10 11
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64
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22
1. Casting mechanism

0323 0323-D2
13
1
2
3
4
5
6
7
8
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10
11
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64
22T2-011
233WF1-011
22T1-006
22T1-007
68WF1-001
68WF1-002
22T1-003C3
68WF1-029
68WF1-028
68WF1-018
68WF1-019
7WF4-030
17WF1-018
22T1-008
1WF5-039
233WF1-003
68WF1-010
68WF1-011
68WF1-012
68WF1-013
233WF1-006
235WF1-003
22T1-015
22T1-011
22T1-016
68WF1-015
36T2-006D4
36T2-006D3
22T1-009E3
36T2-006D2
36T2-006D1
22T1-003C6
68WF1-016
22T1-013
1WF3-025
7WF4-005
22T1-003C4
233WF1-008
233WF1-012
233WF1-005A
233WF1-005B
233WF1-005E
233WF1-005K
233WF1-005C
233WF1-005F
233WF1-005G
233WF1-005H
233WF1-005I
233WF1-005J
233WF1-005D
68WF1-017
20T1-013F3
20T1-013F2
68WF1-023
233WF1-009
20T1-020
7WF4-004
68WF1-008
233WF1-004
233WF1-001
235WF1-001
233WF1-002
235WF1-001
233WF1-010
22T2-004
7WF4-019
φ8.8
SM11 /64 "×40×9. 4
φ19
SM11/64"×40×8
GB82 7 2.5×5镀 铬
SM11/64"×40×12
φ21.8
φ29
φ26
φ8.8
SM11 /64 "×40×5. 5
φ27
GB93 6 发 黑
SM9/ 64"×4 0×6
SM15/64"×28×8
SM11 /64 "×40×5. 5
φ11.8
SM9/ 64"×4 0×4
SM3/32"×56
SM11/64"×40
SM11 /64 "×40×20
SM11 /64 "×40×28
SM11 /64 "×40×7. 5
2
1
9
9
1
1
4
1
1
2
1
1
1
1
1
8
1
1
2
1
1
-
1
3
1
1
4
4
1
1
2
1
1
2
1
1
2
1
1
1
1
1
1
1
1
1
2
1
1
1
1
1
1
2
1
1
1
2
2
1
1
-
1
-
1
1
1
1
2
1
9
9
1
1
4
1
1
2
-
1
1
1
1
8
1
1
2
1
1
1
-
3
1
1
4
4
1
1
2
1
1
2
1
1
2
1
1
1
1
1
1
1
1
1
2
1
1
1
1
1
1
2
1
1
1
2
2
1
1
1
-
1
-
1
1
1
No . Parts No . Name of parts
Qty.
Remarks
Rubb er pl ug
Felt
Screw
Wash er
Cover
Seal
Rubb er pl ug
Nut
Thre ad gu ide
Rivet
Back c ove r
Seal
Rubb er pl ug
Screw
Oil wi ndo w
Screw
Uppe r cov er
Seal
Rubb er pl ug
Rubb er pl ug
Rubb er pl ug
Mode l lab el
Mode l lab el
Rubb er pl ug
Screw
Rubb er pl ug
Wash er
Bed le g
Nut
Spri ng
Thre ad te nsi on disc
Screw
Thre ad gu ide
Screw
Thre ad gu ide
Screw
Screw
Hold er
Rubb er pl ug
Thre ad gu ide
Thre ad re lea se bar
Seal r ing
Adju sti ng br acket
Thre ad ta ke- up spring
Thre ad re lea se pin
Screw
Thre ad te nsi on disc
Thre ad re lea se disc
Spri ng
Stop d isc
Nut
Screw
Thre ad gu ide
Screw
Spri ng
Slid e pla te
Need le pl ate
Screw
Screw
Screw
Face p lat e
Arm
Arm
Bed
Bed
Thre ad ta ke- up lever gu ard
Screw
Caut ion l abe l
1. Casting mechanism

1
2
3
4
5
6
7
8
9
10
11 1213 14
15
16
47
17
19 20
27
21
22
23
24
2526
27
2829
30
31
32
33
34
35 36
37
38
39
15
15
15 34
40
41
42
34
38
44
45
46
34
14
18
43
2. Thread take-up mechanism