typical GC24660 User manual

Post-bed Single Needle Upper and
Lower Roller Feed Sewing Machine
R
GC24660
GC24680
OPERATION INSTRUCTION / PARTS MANUAL
Post-bed Twin Needle Upper and
Lower Roller Feed Sewing Machine

ADD: WANPING TOWN, WUJIANG CITY, JIANGSU
PROVINCE, CHINA
TEL: [phone] 63391278
FAX: [phone] 63391627
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
Printed in July 2005

1. Brief introduction.......................................................................................................1
2. Main technical specification........................................................................................1
3. Preparation.................................................................................................................1
4. Installing the machine................................................................................................. 1
5. Installing the motor.....................................................................................................2
6. Connecting pedalto the clutch lever.............................................................................2
7. Installing the oil reservoir............................................................................................2
8. Installingthe knee lifter device....................................................................................3
9. Selection of the thread.................................................................................................3
10. Installingthe needle..................................................................................................3
11. Windingthe bobbin thread.........................................................................................4
12. Threading.................................................................................................................4
13. Installing thebobbin andthe bobbincase....................................................................4
14. First sewing..............................................................................................................5
15. End of sewing............................................................................................................5
16. Adjusting the stitch length..........................................................................................5
17. Adjusting thebobbin thread and the needle thread........................................................6
18. Adjusting the range and the tension of thread take-up spring..........................................6
19. Adjusting the pressure of the roller foot.......................................................................7
20. Installing and removing the rotating hook....................................................................7
21. Adjusting the positionof the rotating hook and needle..................................................8
22. Adjusting the position of the needle bar.......................................................................8
23. Adjusting the positionof thehook point......................................................................8
24. Adjusting the clearance between the hook point and the needle......................................9
25. Relationship between rotating hook and hook set bracket..............................................9
1. Arm and bed.........................................................................................................10-11
2. Threadtension parts.............................................................................................12-13
3. Upper shaft threadtake-up parts............................................................................14-15
4. Needle bar parts....................................................................................................16-17
5. Feed mechanism...................................................................................................18-19
6. Presser bar lifter parts...........................................................................................20-21
7. Upper roller feed parts..........................................................................................22-23
8. Lower shaft..........................................................................................................24-25
9. Post bed...............................................................................................................26-27
10. Post bed (partsonly for double needle machine)....................................................28-29
11. Threadwinder.................................................................................................... 30-31
12. Accessories........................................................................................................32-33
1. Brief introduction.......................................................................................................1
2. Main technical specification........................................................................................1
3. Preparation.................................................................................................................1
4. Installing the machine................................................................................................. 1
5. Installing the motor.....................................................................................................2
6. Connecting pedalto the clutch lever.............................................................................2
7. Installing the oil reservoir............................................................................................2
8. Installingthe knee lifter device....................................................................................3
9. Selection of the thread.................................................................................................3
10. Installingthe needle..................................................................................................3
11. Windingthe bobbin thread.........................................................................................4
12. Threading.................................................................................................................4
13. Installing thebobbin andthe bobbincase....................................................................4
14. First sewing..............................................................................................................5
15. End of sewing............................................................................................................5
16. Adjusting the stitch length..........................................................................................5
17. Adjusting thebobbin thread and the needle thread........................................................6
18. Adjusting the range and the tension of thread take-up spring..........................................6
19. Adjusting the pressure of the roller foot.......................................................................7
20. Installing and removing the rotating hook....................................................................7
21. Adjusting the positionof the rotating hook and needle..................................................8
22. Adjusting the position of the needle bar.......................................................................8
23. Adjusting the positionof thehook point......................................................................8
24. Adjusting the clearance between the hook point and the needle......................................9
25. Relationship between rotating hook and hook set bracket..............................................9
1. Arm and bed.........................................................................................................10-11
2. Threadtension parts.............................................................................................12-13
3. Upper shaft threadtake-up parts............................................................................14-15
4. Needle bar parts....................................................................................................16-17
5. Feed mechanism...................................................................................................18-19
6. Presser bar lifter parts...........................................................................................20-21
7. Upper roller feed parts..........................................................................................22-23
8. Lower shaft..........................................................................................................24-25
9. Post bed...............................................................................................................26-27
10. Post bed (partsonly for double needle machine)....................................................28-29
11. Threadwinder.................................................................................................... 30-31
12. Accessories........................................................................................................32-33
CONTENTCONTENT
Operation InstructionOperation Instruction
Parts ManualParts Manual

11
1. Brief introduction1. Brief introduction
2. Main technical specification2. Main technical specification
This series sewing machine is the top product among
the post bed sewing machines. It adopts the synchro-
nized feed mechanism of wheel driven roller presser
and needle feed. It forms two-thread lockstitch with
take-up lever and vertical rotating hook.The machine
also used high precision of synchronized belt and
adjustable button mechanism. Needle bearings or ball
bearings are used for most of the machine movement
parts. Safety clutch can avoid the damage of the
rotating hook.
This series machine is designed with beautiful
outlook, accurate stitch length which can be adjusted
conveniently and little difference between stitches.
This machine is suitable for sewing arched products,
such as leather shoes, bags, and gloves.
This series sewing machine is the top product among
the post bed sewing machines. It adopts the synchro-
nized feed mechanism of wheel driven roller presser
and needle feed. It forms two-thread lockstitch with
take-up lever and vertical rotating hook.The machine
also used high precision of synchronized belt and
adjustable button mechanism. Needle bearings or ball
bearings are used for most of the machine movement
parts. Safety clutch can avoid the damage of the
rotating hook.
This series machine is designed with beautiful
outlook, accurate stitch length which can be adjusted
conveniently and little difference between stitches.
This machine is suitable for sewing arched products,
such as leather shoes, bags, and gloves.
Max. sewing speedMax. sewing speed 2500r.p.m2500r.p.m
Max stitch lengthMax stitch length 5mm5mm
Presser foot lift heightPresser foot lift height
7mm by hand, 9mm by knee7mm by hand, 9mm by knee
Needle bar strokeNeedle bar stroke 38mm38mm
NeedleNeedle DP 17 14#~20#DP 17 14#~20#
Rotating hookRotating hook vertical rotating hookvertical rotating hook
Needle gaugeNeedle gauge
2.4mm (standard),
1.2mm, 1.6mm, 2mm,
3.2mm, 4mm
2.4mm (standard),
1.2mm, 1.6mm, 2mm,
3.2mm, 4mm
LubricationLubrication oiling by handoiling by hand
MotorMotor 370W370W
4. Installing the motor (Fig.1)4. Installing the motor (Fig.1)
First, put the cushion Aand cushion B into the cutout
on the table, and fix the hinge C on the cushion B,
then turn the machine head freely till it is seated on
the frame of the table cutout.
First, put the cushion Aand cushion B into the cutout
on the table, and fix the hinge C on the cushion B,
then turn the machine head freely till it is seated on
the frame of the table cutout.
3. Preparation (Fig.1)3. Preparation (Fig.1)
1. Cleaning the machine
Before delivery, the machine is coated with dust
preventive grease, which may be hardened and
contaminated by dust during storage and shipment.
This grease and dust must be moved by clean cloth
with gasoline.
2. Examination
Though every machine is confirmed by strict
inspection and test before delivery, the machine
parts may be loosened or deformed after long
distance transportation with jolt. A thorough
examination must be performed after cleaning
the machine. Turn the balance wheel to see if there
is running obstruction, parts collision, uneven
resistance or abnormal noise. If these exist,
adjustment must be made accordingly.
1. Cleaning the machine
2. Examination
Before delivery, the machine is coated with dust
preventive grease, which may be hardened and
contaminated by dust during storage and shipment.
This grease and dust must be moved by clean cloth
with gasoline.
Though every machine is confirmed by strict
inspection and test before delivery, the machine
parts may be loosened or deformed after long
distance transportation with jolt. A thorough
examination must be performed after cleaning
the machine. Turn the balance wheel to see if there
is running obstruction, parts collision, uneven
resistance or abnormal noise. If these exist,
adjustment must be made accordingly.

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20 ~3020 ~30
5. Installing the motor (Fig.2)5. Installing the motor (Fig.2)
Align the balance wheel belt groove A with motor
pulley belt groove B by moving the motor C
leftward and rightward. Make sure the belt does not
touch the table.
Align the balance wheel belt groove A with motor
pulley belt groove B by moving the motor C
leftward and rightward. Make sure the belt does not
touch the table.
6. Connecting pedal to the clutch lever (Fig.3)6. Connecting pedal to the clutch lever (Fig.3)
1. The optimum tilt angle of pedal with floor is approx..
15 degree.
2. Adjust the motor clutch so that the clutch lever C
and draw bar B run in line as Fig.3.
3. The machine balance wheel should rotate counter
clockwise for normal sewing when view from
opposite side of the balance wheel.The motor rotates
in the same direction. And the rotation can be
reversed by reversing (turn over 180deg.) the plug
of the motor.
4. Adjust the tension of the V-belt by moving the motor
vertically. The proper tension of the V-belt is a slack
of 10-12mm when the belt is depressed (on the belt
pan) by finger.
1. The optimum tilt angle of pedal with floor is approx..
15 degree.
2. Adjust the motor clutch so that the clutch lever C
and draw bar B run in line as Fig.3.
3. The machine balance wheel should rotate counter
clockwise for normal sewing when view from
posite side of the balance wheel.The motor rotates
in the same direction. And the rotation can be
reversed by reversing (turn over 180deg.) the plug
of the motor.
4. Adjust the tension of the V-belt by moving the
vertically. The proper tension of the V-belt is a slack
of 10-12mm when the belt is depressed (on the belt
pan) by finger.
op
motor
7. Installing the oil reservoir (Fig.4)7. Installing the oil reservoir (Fig.4)
Smoothly put the oil reservoir A into the bottom of
the table, and tighten the screw B into the both sides
of the table cutout to secure the oil reservoir. Please
note the position of knee lifter.
Smoothly put the oil reservoir A into the bottom of
the table, and tighten the screw B into the both sides
of the table cutout to secure the oil reservoir. Please
note the position of knee lifter.

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8. Installing the knee lifter device (Fig.5)8. Installing the knee lifter device (Fig.5)
Put the knee lifter device into the connector A, then
tighten the screw C. The position of knee lifter bell
could be adjusted according to the user 's position.
Put the knee lifter device into the connector A, then
tighten the screw C. The position of knee lifter bell
could be adjusted according to the user 's position.
1. Thread must be in good quality.
2. The needle thread must be left-twisted.
3. Hold the thread, and twist it by right hand in the
direction of the arrow shown in Fig.6. If the thread
becomes tight, then it is left-twisted. On the
contrary, it is right-twisted.
1. Thread must be in good quality.
2. The needle thread must be left-twisted.
3. Hold the thread, and twist it by right hand in the
direction of the arrow shown in Fig.6. If the thread
becomes tight, then it is left-twisted. On the
contrary, it is right-twisted.
Please apply to needle DP 17 14#~20#. The
selection of needle must be in accordance with the
thread and material.
1. Lift the presser foot lift bar;turn the balance wheel
to lift the needle bar to its highest position.
2. Open the roller presser foot A.
3. Loosen the needle set screw B.
4. When installing single needle machine, the long
groove of the needle should be leftward, then fully
insert the needle up to the bottom of the needle
socket as Fig.7; when installing double needle
machine, the long grooves of the two needles must
be opposite to each other, then fully insert the
needle up to the bottom of the needle socket.
5.Tighten the needle set screw B.
Please apply to needle DP 17 14#~20#. The
selection of needle must be in accordance with the
thread and material.
1. Lift the presser foot lift bar;turn the balance wheel
to lift the needle bar to its highest position.
2. Open the roller presser foot A.
3. Loosen the needle set screw B.
4. When installing single needle machine, the long
groove of the needle should be leftward, then fully
insert the needle up to the bottom of the needle
socket as Fig.7; when installing double needle
machine, the long grooves of the two needles must
be opposite to each other, then fully insert the
needle up to the bottom of the needle socket.
5.Tighten the needle set screw B.
9. Selection of the thread (Fig.6)9. Selection of the thread (Fig.6)
10. Installing the needle (Fig.7)10. Installing the needle (Fig.7)

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Install the bobbin B to the bobbin winder spindle,
pass the thread A between the tension disc E, and
then wind the thread a few turns around the bobbin.
Lift the lever D to make the latch lever C lock the
bobbin B. The machine will automatically wind
when sewing.(Lift the presser foot when wind
without running the machine.)
Do not overfill the bobbin, as it will make the thread
loosen down from the bobbin. The optimum capacity
of thread will be about 80% of the outside diameter
of the bobbin. The winding amount can be adjusted
by screw H.
After the bobbin is filled, the bobbin thread could be
cut down with the thread-cutting blade. Wind the
bobbin thread Atwo turns around the blade, then pull
it.
Install the bobbin B to the bobbin winder spindle,
pass the thread A between the tension disc E, and
then wind the thread a few turns around the bobbin.
Lift the lever D to make the latch lever C lock the
bobbin B. The machine will automatically wind
when sewing.(Lift the presser foot when wind
without running the machine.)
Do not overfill the bobbin, as it will make the thread
loosen down from the bobbin. The optimum capacity
of thread will be about 80% of the outside diameter
of the bobbin. The winding amount can be adjusted
by screw H.
After the bobbin is filled, the bobbin thread could be
cut down with the thread-cutting blade. Wind the
bobbin thread Atwo turns around the blade, then pull
it.
11. Winding the bobbin thread (Fig.8)11. Winding the bobbin thread (Fig.8)
When threading the needle thread, raise the needle
bar to its highest position, open the roller foot, then
lead the thread from the spool and pass it in the order
instructed.
1. Leading the thread down through the two-eye thread
guide 1 on the top of the machine.
2. To left pass the thread through right hole of thread
guide, then pass down it through the thread tension
disc 2.
3. Pass down through the thread tension disc 3.
4. To left pass through the thread control assembly 4.
5. Pass up through the upper thread guide 5,then pass
through the thread hole of the thread take-up lever
from right to left.
6.Pass down through the middle thread guide 6,lower
thread guide 7 and needle bar thread guide 8, then
pass through the hole of the needle 9 and draw out
over 100mm.
When threading the needle thread, raise the needle
bar to its highest position, open the roller foot, then
lead the thread from the spool and pass it in the order
instructed.
1. Leading the thread down through the two-eye thread
guide 1 on the top of the machine.
2. To left pass the thread through right hole of thread
guide, then pass down it through the thread tension
disc 2.
3. Pass down through the thread tension disc 3.
4. To left pass through the thread control assembly 4.
5. Pass up through the upper thread guide 5,then pass
through the thread hole of the thread take-up lever
from right to left.
6.Pass down through the middle thread guide 6,lower
thread guide 7 and needle bar thread guide 8, then
pass through the hole of the needle 9 and draw out
over 100mm.
12. Threading (Fig.9)12. Threading (Fig.9)
1. Open the rotating hook guard A.
2. Lift the bobbin case latch lever B.
3. Draw out the threads about 50mm from the notch of
the bobbin case.
4. Install the bobbin case into the rotating hook.
5. Close the bobbin case latch lever B.
6. Hold the needle thread by left hand, and turn the
balance wheel by right hand to put aside the bobbin
thread.
7. Close the rotating hook guard A.
1. Open the rotating hook guard A.
2. Lift the bobbin case latch lever B.
3. Draw out the threads about 50mm from the notch of
the bobbin case.
4. Install the bobbin case into the rotating hook.
5. Close the bobbin case latch lever B.
6. Hold the needle thread by left hand, and turn the
balance wheel by right hand to put aside the bobbin
thread.
7. Close the rotating hook guard A.
13. Installing the bobbin and the bobbin case (Fig.10)13. Installing the bobbin and the bobbin case (Fig.10)

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1. Push down the stitch length adjusting button B by
left forefinger.
2. Turn the balance wheel by right hand.
3. The stitch length could be adjusted when the
adjusting button is depressed.
4. The figure is marked on the balance wheel, and the
figure indicates the stitch length. Please release the
adjusting button when you align the figure with the
mark C.
1. Push down the stitch length adjusting button B by
left forefinger.
2. Turn the balance wheel by right hand.
3. The stitch length could be adjusted when the
adjusting button is depressed.
4. The figure is marked on the balance wheel, and the
figure indicates the stitch length. Please release the
adjusting button when you align the figure with the
mark C.
14. First sewing (Fig.11)14. First sewing (Fig.11)
1. Lift the presser foot lift lever.
2. Close the roller foot.
3. Lay down the materials.
4. Turn the balance wheel to make the needle pick
through the materials.
5. Put down the presser foot lift lever.
6. The thread should be drawn out about 100mm for the
first sewing.
1. Lift the presser foot lift lever.
2. Close the roller foot.
3. Lay down the materials.
4. Turn the balance wheel to make the needle pick
through the materials.
5. Put down the presser foot lift lever.
6. The thread should be drawn out about 100mm for the
first sewing.
15. End of sewing (Fig.12)15. End of sewing (Fig.12)
1. Lift the thread take-up lever to its highest position.
2. Lift the presser foot lift lever.
3. Draw out the sewing material slant ways.
4. Cut off the needle thread and bobbin thread. Leave
about 100mm needle thread and bobbin thread when
drawing out the material for next sewing.
1. Lift the thread take-up lever to its highest position.
2. Lift the presser foot lift lever.
3. Draw out the sewing material slant ways.
4. Cut off the needle thread and bobbin thread. Leave
about 100mm needle thread and bobbin thread when
drawing out the material for next sewing.
16. Adjusting the stitch length (Fig.13)16. Adjusting the stitch length (Fig.13)

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StrengthenStrengthen
LoosenLoosen
TightenTighten
WeakenWeaken
Needle thread tensionNeedle thread tension
17. Adjusting the bobbin thread and the needle thread (Fig.14)17. Adjusting the bobbin thread and the needle thread (Fig.14)
18. Adjusting the range and the tension of thread take-up spring (Fig.15)18. Adjusting the range and the tension of thread take-up spring (Fig.15)
Normal stitch form should be as shown in Fig.14.
When abnormal stitches occur with puckering or
thread breakage, the tension of needle thread and
bobbin thread must be adjusted accordingly.
1.If the stitch form is the same with B,it indicates that
the needle thread is too strong and the bobbin thread
is too weak. Turn the tension regulating thumb nut
counter clockwise to weaken the needle thread
tension or tighten the screw B to strengthen the
bobbin thread tension.
2.If the stitch form is the same with C,it indicates that
the needle thread tension is too weak and the bobbin
thread tension is too strong. Turn the tension
regulating thumb nut clockwise to strengthen the
needle thread tension or loosen the screw B to weaken
the bobbin thread tension.
Normal stitch form should be as shown in Fig.14.
When abnormal stitches occur with puckering or
thread breakage, the tension of needle thread and
bobbin thread must be adjusted accordingly.
1.If the stitch form is the same with B,it indicates that
the needle thread is too strong and the bobbin thread
is too weak. Turn the tension regulating thumb nut
counter clockwise to weaken the needle thread
tension or tighten the screw B to strengthen the
bobbin thread tension.
2.If the stitch form is the same with C,it indicates that
the needle thread tension is too weak and the bobbin
thread tension is too strong. Turn the tension
regulating thumb nut clockwise to strengthen the
needle thread tension or loosen the screw B to weaken
the bobbin thread tension.
Before delivery, the thread take-up spring is properly
adjusted. Readjustment is only needle in the case of
sewing special material or with special thread.
Loosen the screw B, turn the tension spring A
clockwise to decrease the sewing range, or to turn
the tension spring A counter clockwise to increase
the sewing range. Then tighten the screw B after
finishing the adjustment.
Before delivery, the thread take-up spring is properly
adjusted. Readjustment is only needle in the case of
sewing special material or with special thread.
Loosen the screw B, turn the tension spring A
clockwise to decrease the sewing range, or to turn
the tension spring A counter clockwise to increase
the sewing range. Then tighten the screw B after
finishing the adjustment.

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Counter ClockwiseCounter ClockwiseClockwiseClockwise
19. Adjusting the pressure of the roller foot (Fig.16)19. Adjusting the pressure of the roller foot (Fig.16)
20. Installing and removing the rotating hook (Fig.17)20. Installing and removing the rotating hook (Fig.17)
Please adjust the roller foot according to the material
to be sewn. When sewing heavy material, please
increase the pressure by turning screw Aclockwise.
Or turn the screw Acounter clockwise to decrease
the pressure.
Please adjust the roller foot according to the material
to be sewn. When sewing heavy material, please
increase the pressure by turning screw Aclockwise.
Or turn the screw Acounter clockwise to decrease
the pressure.
Replace the rotating hook when it is deformed or
damaged.
1. Replacing the rotating hook.
a. Turn the balance wheel by hand to lift the needle
bar to its highest position and then replace the needle
plate C.
b. Open the hook cover 1, lift the lever 2, and take out
the bobbin case 4 and bobbin 5.
c. Take down the thread separator 3.
d. Take down the screw 6 and gib 7.
e. Take out the hook head 8.
f. Tighten the set screw 9 and take out the hook cover
10.
2. Installing the rotating hook
Install the rotating hook in the reverse order of
replacing it.
When inserting the bobbin case, please align the
position point on the bobbin case with the position
groove on the rotating hook shaft.
When installing the needle plate C, please put the
convex part Aof the rotating hook into the needle
plate groove B, then tighten the screw.
Replace the rotating hook when it is deformed or
damaged.
1. Replacing the rotating hook.
a. Turn the balance wheel by hand to lift the needle
bar to its highest position and then replace the needle
plate C.
b. Open the hook cover 1, lift the lever 2, and take out
the bobbin case 4 and bobbin 5.
c. Take down the thread separator 3.
d. Take down the screw 6 and gib 7.
e. Take out the hook head 8.
f. Tighten the set screw 9 and take out the hook cover
10.
2. Installing the rotating hook
Install the rotating hook in the reverse order of
replacing it.
When inserting the bobbin case, please align the
position point on the bobbin case with the position
groove on the rotating hook shaft.
When installing the needle plate C, please put the
convex part Aof the rotating hook into the needle
plate groove B, then tighten the screw.

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1. Open the hook cover.
2. Put down the machine head.
3. Take off the bevel gear oil case (upper).
4. Loosen the screw B, A and D.
5. Turn the balance wheel to lift the needle by 1.8mm
from its lowest position.
6. Turn the bevel gear C to align the hook point with
the center of the needle groove.
7. Tighten the screw B and screw A.
8. Install the bevel gear oil case (upper).
1. Open the hook cover.
2. Put down the machine head.
3. Take off the bevel gear oil case (upper).
4. Loosen the screw B, A and D.
5. Turn the balance wheel to lift the needle by 1.8mm
from its lowest position.
6. Turn the bevel gear C to align the hook point with
the center of the needle groove.
7. Tighten the screw B and screw A.
8. Install the bevel gear oil case (upper).
21. Adjusting the position of the rotating hook and needle (Fig.18)21. Adjusting the position of the rotating hook and needle (Fig.18)
22. Adjusting the position of the needle bar (Fig.19)22. Adjusting the position of the needle bar (Fig.19)
23. Adjusting the position of the hook point (Fig.20)23. Adjusting the position of the hook point (Fig.20)
When the tip of the needle is raised by 1.8mm from its
lowest position, the position of the rotating hook and
the needle should be set as shown in Fig.18.
1. The top of needle eye should be 1 0.3mm lower
than the hook point.
2. Hook point is aligned with the tip of the needle.
3. The clearance between the hook point and the
needle groove should be 0~0.05mm.
When the tip of the needle is raised by 1.8mm from its
lowest position, the position of the rotating hook and
the needle should be set as shown in Fig.18.
1. The top of needle eye should be 1 0.3mm lower
than the hook point.
2. Hook point is aligned with the tip of the needle.
3. The clearance between the hook point and the
needle groove should be 0~0.05mm.
When the needle bar is lifted by 1.8mm from its
lowest position, adjust the its position to make the
needle eye 1 0.3mm lower than the hook point.
1. Turn the balance wheel to lift the needle bar by
1.8mm from its lowest position.
2. Move the needle bar B upward and downward to
meet the request.
3. Tighten the screw A.
When the needle bar is lifted by 1.8mm from its
lowest position, adjust the its position to make the
needle eye 1 0.3mm lower than the hook point.
1. Turn the balance wheel to lift the needle bar by
1.8mm from its lowest position.
2. Move the needle bar B upward and downward to
meet the request.
3. Tighten the screw A.

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24. Adjusting the clearance between the hook point and the needle (Fig.21)24. Adjusting the clearance between the hook point and the needle (Fig.21)
25. Relationship between rotating hook and hook set bracket (Fig.22)25. Relationship between rotating hook and hook set bracket (Fig.22)
Turn the balance wheel to lift the thread take-up lever
to its highest position, then check whether there is a
distance C between the hook and the hook set bracket.
C is usually 0.1~0.3mm.
Adjusting method:
1. Open the hook cover A.
2. When the distance is bigger or smaller, please loosen
the screw B.
3. Turn the set ring D slightly, then tighten the screw B
after adjustment.
Turn the balance wheel to lift the thread take-up lever
to its highest position, then check whether there is a
distance C between the hook and the hook set bracket.
C is usually 0.1~0.3mm.
Adjusting method:
1. Open the hook cover A.
2. When the distance is bigger or smaller, please loosen
the screw B.
3. Turn the set ring D slightly, then tighten the screw B
after adjustment.
The clearance between the hook point and needle is
about 0.05mm, which has been adjusted before del
ivery. The readjustment is needed only when the
needle is changed.
1. Take out the hook cover.
2. Put down the machine head.
3. Take off the bevel gear oil case (upper).
4. Loosen the screw B, A and B.
5. Turn the balance wheel to lift the needle by 1.8mm
from its lowest position.
6. Turn the rotating hook to align the hook point with
the center of needle groove.
7. Loosen the screw E, and move the post-bed F leftward
and rightward to assure 0.05mm clearance between
the hook point and the needle.
8. Tighten all the screws.
9. Install the bevel gear oil case (upper).
The clearance between the hook point and needle is
about 0.05mm, which has been adjusted before del
ivery. The readjustment is needed only when the
needle is changed.
1. Take out the hook cover.
2. Put down the machine head.
3. Take off the bevel gear oil case (upper).
4. Loosen the screw B, A and B.
5. Turn the balance wheel to lift the needle by 1.8mm
from its lowest position.
6. Turn the rotating hook to align the hook point with
the center of needle groove.
7. Loosen the screw E, and move the post-bed F leftward
and rightward to assure 0.05mm clearance between
the hook point and the needle.
8. Tighten all the screws.
9. Install the bevel gear oil case (upper).

1. Arm and bed1. Arm and bed

1. Arm and bed1. Arm and bed
No.No. Part numberPart number NameName Qt.Qt. RemarkRemark
Double needleDouble needle
Single needleSingle needle
Face plateFace plate
Screw (long)Screw (long)
Screw (short)Screw (short)
Rear coverRear cover
ScrewScrew
Rear coverRear cover
ScrewScrew
ArmArm
ScrewScrew
Support bracketSupport bracket
ScrewScrew
Bed supportBed support
Rubber plugRubber plug
ScrewScrew
Safety guardSafety guard
Connecting armConnecting arm
Model plateModel plate
Model plateModel plate
RivetRivet
BedBed
Trade markTrade mark
Safety guardSafety guard
ScrewScrew

2. Thread tension parts2. Thread tension parts

2. Thread tension parts2. Thread tension parts
Thread guide studThread guide stud
NutNut
Middle thread guideMiddle thread guide
WasherWasher
ScrewScrew
Lower thread guide plateLower thread guide plate
Lower thread guide holderLower thread guide holder
ScrewScrew
ScrewScrew
SpringSpring
BushingBushing
PadPad
PinPin
inin
Upper thread guideUpper thread guide
PinPin
ScerwScerw
Set plateSet plate
Set plateSet plate
Thread erecting plateThread erecting plate
ScrewScrew
PinPin
NutNut
Stop plateStop plate
SpringSpring
Thread erecting plateThread erecting plate
Thread tension discThread tension disc
Thread releasing pinThread releasing pin
Thread releasing pin (short)Thread releasing pin (short)
NutNut
SpringSpring
Thread tension discThread tension disc
ScrewScrew
NutNut
Stopper plateStopper plate
ScrewScrew
ScrewScrew
ScrewScrew
Thread control assemblyThread control assembly
NutNut
Thread take-up springThread take-up spring
Thread take-up springThread take-up spring
ScrewScrew
Thread take-up spring shaftThread take-up spring shaft
Thread take-up spring shaftThread take-up spring shaft
ScrewScrew
PadPad
Screw (long)Screw (long)
Thread releasing pin (long)Thread releasing pin (long)
Pin (long)Pin (long)
No.No. Part numberPart number NameName Qt.Qt. RemarkRemark
Double needleDouble needle
Single needleSingle needle

3. Upper shaft thread take-up parts3. Upper shaft thread take-up parts

3. Upper shaft thread take-up parts3. Upper shaft thread take-up parts
No.No. Part numberPart number NameName Qt.Qt. RemarkRemark
Double needleDouble needle
Single needleSingle needle
Thread take-up leverThread take-up lever
WasherWasher
RetainerRetainer
BearingBearing
Thread take-up lever pinThread take-up lever pin
ScrewScrew
BushingBushing
ScrewScrew
Position ringPosition ring
Bearing (small)Bearing (small)
RetainerRetainer
Bearing (big)Bearing (big)
ScrewScrew
Thread take-up crankThread take-up crank
Needle bearingNeedle bearing
Needle bar linkNeedle bar link
Needle bar adapterNeedle bar adapter
ScrewScrew
Seal ringSeal ring
RetainerRetainer
Needle bar crankNeedle bar crank
ScrewScrew
ScrewScrew
ScrewScrew
ScrewScrew
Upper shaftUpper shaft
Front bearing completeFront bearing complete
Driven wheelDriven wheel
ScrewScrew
Synchronic wheelSynchronic wheel
ScrewScrew
ScrewScrew
Rear bearing completeRear bearing complete
BushingBushing
Rear bearing ringRear bearing ring
WasherWasher
Synchronic beltSynchronic belt
CoverCover
ScrewScrew
RetainerRetainer
Front bearing completeFront bearing complete
ShaftShaft
Balance wheelBalance wheel
ScrewScrew
ScrewScrew
Feed regulating graduation ringFeed regulating graduation ring
Feed regulating graduation ringFeed regulating graduation ring
Thread take-up lever completeThread take-up lever complete
RivetRivet

4. Needle bar parts4. Needle bar parts

4. Needle bar parts4. Needle bar parts
No.No. Part numberPart number NameName Qt.Qt. RemarkRemark
Double needleDouble needle
Single needleSingle needle
Upper feed shaftUpper feed shaft
SpacerSpacer
RetainerRetainer
Rear bearingRear bearing
BushingBushing
ScrewScrew
CollarCollar
ConnectorConnector
Needle vibrating linkNeedle vibrating link
RetainerRetainer
BearingBearing
Connecting pinConnecting pin
Vibrating camVibrating cam
ScrewScrew
Rubber plugRubber plug
Connecting shaftConnecting shaft
SpacerSpacer
Needle bearingNeedle bearing
PinPin
PinPin
CrankCrank
ScrewScrew
ScrewScrew
CollarCollar
ScrewScrew
Needle bar rock shaftNeedle bar rock shaft
Needle bar rock frameNeedle bar rock frame
PinPin
Oil feltOil felt
Rubber plugRubber plug
Needle barNeedle bar
Needle barNeedle bar
ScrewScrew
FeltFelt
Bracket for feltBracket for felt
ScrewScrew
RailRail
FeltFelt
Sliding blockSliding block
ScrewScrew
NeedleNeedle
NeedleNeedle
ScrewScrew
BushingBushing
Stop plateStop plate
ScrewScrew
Needle clampNeedle clamp