HIGHLEAD GC24699 Instruction Manual

GC24699
Instruction Manual
Parts Catalog
Adjustable High Post Bed
Compound Feed Lockstitch Sewing Machine
SHANGHAI BIAOZHUN HAILING SEWING MACHINERY CO., LTD.

───CONTENTS───
OPERATION INSTRUCTION
1. PRECAUTIONS BEFORE STARTING OPERATION·················································································1
2. LUBRICATION····················································································································································2
3. PRECAUTIONS OPERATION·························································································································2
4. INSTALLING NEEDLE ·····································································································································2
5. WINDING BOBBIN THREAD··························································································································2
6. THREADING························································································································································3
7. BALANCE OF THREAD TENSION················································································································3
8. ADJUSTMENT OF STITCH LENGTHAND REVERSE SEWING··························································3
9. ADJUSTMENT OF THREAD TENSION········································································································3
10. ADJUSTMENT OF THE PRESSURE OF PRESSER FEET·······································································4
11. TIMING BETWEEN THE HOOK AND NEEDLE ·······················································································4
12. TILT THE HOOK SADDLE······························································································································4
13. TIMING BETWEEN RORATING HOOK MOTION AND TAKE-UP LEVER MOTION····················4
14. TIMING BETWEEN THE NEEDLEAND HOOK ·······················································································5
15. SAFETY CLUTCH DEVICE·····························································································································5
16. ADJUSTMENT THE STITCH TOLERANCE·······························································································6
17. INSTALLATION OF BELT COVER················································································································6
PARTS CATALOG
A. ARM BED AND ITS MECHANISM ·············································································································7
B. THREAD TENSION REGULATOR MECHANISM ················································································9
C. UPPER SHAFT MECHANISM····················································································································11
D. PRESSER FOOT MECHANISM·················································································································13
E. THREAD TAKE-UP LEVER&NEEDLE BAR MECHANISM····························································16
F. STITCH REGULATOR MECHANISM·····································································································19
G. LOWER SHAFT&FEED ROCK SHAFT MECHANISM·····································································21
H. FEED BAR MECHANISM·······························································································································24
I. HOOK SADDLE MECHANISM·····················································································································26
J. HOOK SADDLE SLANTING MECHANISM ··························································································28
K. OIL LUBRICATION MECHANISM···········································································································30
L. ACCESSORIES·················································································································································32

—1 —
1. PRECAUTIONS BEFORE STARTING OPERATION
1) Safety precautions：
（1）When turning the power on, keep your hands and fingers away from the area around/under the needle
and the area around the pulley.
（2）Power must be turned off when the machine is not in use, or when the operator leaves the seat.
（3）Power must be turned off when tilting the machine head, installing or removing the “V” belt, adjusting
the machine, or when replacing.
（4）Avoid placing fingers, hairs, bars etc., near the pulley, “V” belt, bobbin winder pulley, or motor when
the machine is in operation.
（5）Do not insert fingers into the thread take-up cover, under/around the needle, or pulley when the
machine is in operation.
（6）If a belt cover, finger guard, eye guard are installed, do not operate the machine without these safety
devices.
2) Precautions before starting operation：
（1）If the machine’s oil pan has an oil sump, never operate the machine before filling it.
（2）If the machine is lubricated by a drop oiler, never operate the machine before lubricating.
（3）When a new sewing machine is first turned on, verify the rotational direction of the pulley with the
power on. (The pulley should rotate counterclockwise when viewed from the pulley)
（4）Verify the voltage and (single or three) phase with those given on the machine nameplate.
3) Precautions for operating conditions：
（1）Avoid using the machine at abnormally high temperatures（35℃orhigher）or low temperatures（5℃
or lower）.
（2）Avoid using the machine in dusty
conditions.
Overall view of assembled sewing
machine

—2 —
2. LUBRICATION(Fig.1,Fig.2,Fig.3)
1) Oiling(1)
Filling the oil reservoir with oil
up to “H” mark.Oil level should
be periodically checked.If oil
level is found below “L”level
replenish oil to “H”level.
Use white spindle oil.
2) Oiling(2)
When a new sewing machine is
used for the first time, or sewing
machine left out of use for
considerably long time is used
again, replenish a suitable amount
of oil to the portions indicated by arrow in the below figure.
3) Oiling condition
See dripping of oil through the oil sight window to check oiling condition during operation.
3. PRECAUTIONS OPERATION
（1）When the power is turned on or off, keep foot away from the pedal.
（2）It should be noted that the brake might not work when the power is interrupted or power failure
occurs during sewing machine operation.
（3）Since dust in the control box might cause malfunction or control troubles, be sure to keep the control
box cover close during operation.
（4）Do not apply a Multimeter to the control circuit for checking.Otherwise voltage of Multimeter might
damage semiconductor components in the circuit.
4. INSTALLING NEEDLE(Fig.4)
Note: Before installing the needle, be sure to turn off the power.
To install the needle, turn the machine pulley over toward operator(or
counter-clockwise) until the needle bar moves up to its highest point, put the needle
up into the needle bar as deeply as it will go, with the long groove of the needle
faced right side.Tighten the needle set screw securely.
5. WINDING BOBBIN THREAD(Fig.5)
Note:When bobbin thread is wound, keep the presser foot lifted
Adjustment:
Tension of wound thread:Slack winding is recommended for polyester thread and nylon thread.
Conically wound thread:Move the thread guide toward smaller diameter of wound thread layer.

—3 —
Length of wound thread:Loosen the thread lenghth adjusting screw to increase length of the thread and tighten
the screw to decrease length of thread.
6. THREADING(Fig.6,Fig.7)
（1）Pass each thread through thread
guide A.
Note:When thin slippery thread(polyster
thread) is used pass the thread through
thread guide B as show in Fig.7.
（2）Thread take-up lever to the
highest position,pass each thread in the
order in Fig.6.
Note:Pressing the tension releasing button ,the thread can be pulled out easily.
7. BALANCE OF THREAD TENSION(Fig.8)
8. ADJUSTMENT OF STITCH LENGTHAND REVERSE SEWING(Fig.9)
Rotate the stitch length adjusting dial to change the stitch length.
When press the feed reversing lever, reverse sewing will take place.Loose the lever, reverse sewing will
disappear.
9. ADJUSTMENT OF THREAD TENSION(Fig.10)
Needle thread tension should be adjusted in refence to bobbin thread tension.

—4 —
To adjust needle thread tension,turn each tension adjusting nut.Needle thread tension can be also adjusted for
special fabric and thread by changing intensity and movable range of slack thread adjusting spring.
10. ADJUSTMENT OF THE PRESSURE OF PRESSER FEET(Fig.11)
The pressure of the presser feet is regulated by the adjusting screw.
To increase the pressure, turn the screw to clockwise, and decrease it, turn the screw to counter-clockwise.
11. TIMING BETWEEN THE HOOK AND NEEDLE(Fig.12)
（1）Set the stitch length to “7”on the stitch length dial.
（2）When the needle is lifted 2.4mm from the lower dead
point,the following positional relationship should be maintained:
a.The lower edge of needle eye should be 2.3mm below the hook
point.
b.The center of the needle the hook point is on a line.
c.Gap between the hook point and the side face of needle should
be 0.05mm.
12. TILT THE HOOK SADDLE(Fig.13, Fig.14)
When put material to be sewn onto or remove it from the hook
saddle,the hook saddle can be tilted to operator. Loosen the lever 2 as
fig.14,then press the lever 3 toward to operator as fig.14.The hook
saddle can be tilted.The pressure of the lever 3 can be adjusted by the
nut.After material put on or remove,push the hook saddle to the
original position.And tighten the lever 2.
13. TIMING BETWEEN ROTATING HOOK
MOTION AND TAKE-UP LEVER MOTION
(Fig.15)
When the timing belt is removed for its replacement,for example,the
relationship between rotating hook motion and take-up lever motion
should be adjusted as follow:
（1）Turn the balance wheel and stop when the take-up lever is
lifted to its upper dead point.
（2）Lean the machine head backward and make sure the

—5 —
arrow(timing mark)put on the timing belt is in line with the line on the boss of lower shaft bearing.
（3）If the timing mark is not in line with the line,remove the timing belt and install it again to adjust.
14. TIMING BETWEEN THE NEEDLE AND HOOK(Fig.16,Fig.17,Fig.18)
（1）Set the stitch length to “0”on the feed setting dial.
（2）Lean the machine head backward.
（3）Loosen the feed lifting rock shaft crank set screw A and B.
（4）Set the needle at the lowest position.
（5）Adjust the distance between presser bar and vibration bar
to 8mm and temporarily tighten the feed lifting rock shaft crank set
screw Aand B.
（6）Check the right feed lifting rock shaft crank is connected
with the link at right angle,as shown in Fig.17.
（7）If the connection is not at righr angle,remove the back
cover,loosen screw C .
（8）And regulate the right angle.
（9）After the complention of adjustment,fully tighten the
screw A,B and C.
Note:At the same time make sure that the position between the
needle and the feed dog.
15. SAFETY CLUTCH DEVICE(Fig.19,Fig.20)
Safety clutch device is installed to prevent the hook and belt from
damage in case the thread is caught into the hook when the machine is
loaded abnormally during operation.
（1）Function of safety clutch
a.When the safety clutch operate,the belt pulley will be unloaded,the lower shaft will stop.Only the arm
shaft operate.The machine stop operation.
b.Clean the thread thoroughly which is caught into the hook.
c.Turn the belt bushing by hand,check the lower shaft rorates lightly.Then set the clutch device in the
starting position.
（2）Set the safety clutch

—6 —
a.While pressing down the push botton on the bed by left hand,turn the
pulley slowly by right hand away from you as shown in Fig.19.
b.When the belt pulley stopped by the gear plate,then turn the pulley
more firmly.
c.Release the push botton,the safety cluth device is set.
（3）Force applied to the safety clutch
a.The force applied to the safety clutch is the smallest when the mark on
the eccentric pin faces the center of the lower shaft.The force
proprotinally increases as the mark faces the outside.
b.To adjust the force slide the belt,loosen the set screw,and turn
eccentric pin.
c.After the adjustment,make sure to fasten the set screw.
16. ADJUSTMENT THE STITCH TOLERANCE
(Fig.21)
Screwing the pin that connects the link of back-sewing with the crank of
back-sewing(down)can adjust the tolerance of between the
stitched.Screwing the pin in clockwise can increase the stitch of forward
sewing,otherwise,the stitch of back-sewing will be increased.
17. INSTALLATION OF BELT COVER(Fig.22)
Install the belt cover 1 on the arm with the screws 2.Assemble the
belt cover 1 and 3 with the screws 2.And then fixed the belt cover on the
arm with the belt cover stand 4,tighten the screws 2.

— 7 —
A.ARM BED AND ITS ACCESSORIES

— 8 —
Fig.
No. Part No. Description Pcs. Remarks
A01 HA300B2090 Rubber plug 2
A02 HA300B2170 Screw 15
A03 H4716B8001 Oil guard plate 1
A04 H4717B8001 Thread take-up cover 1
A05 H4715B8001 Rubber plug 1Ф13
A06 H4718B8001 Side plate(left) 1
A07 H2000B2010 Rubber plug 1
A08 H4719B8001 Side plate(right) 1
A09 HA700B2060 Screw 2
A10 H2400B2100 Thread guide 1
A11 HA307B0673 Rubber plug 1Ф18
A12 H7117B8001 Cover 2
A13 H2000M0090 Cap 2
A14 H3200B2100 Screw 1SM9/64(40)×6.5
A15 H3212B0066 Thread guide complete 1
A16 H3000D2160 Screw 1
A17 H4726B8001 Thread guide 1
A18 H4727B8001 Face plate 1
A19 H2400B2080 Screw 2
A20 H2400B2070 Thread guide 1
A21 H4730B8001 Guide mounting plate 1
A22 H2400B2060 Spacer 1
A23 H3200B2060 Oil guard plate 1
A.ARM BED AND ITS ACCESSORIES

— 9 —
B.THREAD TENSION REGULATOR MECHANISM

— 10 —
Fig.
No. Part No. Description Pcs. Remarks
B01 H3221B6811 Screw 2
B02 H3221B3142 Tension releasing plate 1
B03 H3221B6812 Tensiong releasing spring 1
B04 H4705C8001 Screw 1
B05 H4706C8001 Lever 1
B06 HA7311C306 Screw 1
B07 H4707C8001 Mounting plate 1
B08 H007013050 E-type ring 1
B09 H3221B6820 Mounting plate 1
B10 HA300C2030 Screw 2
B11 H3221B6810 Nut 2
B12 H4708C8001 Spring 1
B13 H4709C8001 Push button 1
B15 HA112B0693 Thread tension disk 2
B16 H3221B0684 Spring 1
B17 HA710B0671 Nut 1
B18 H3221B0682 Pin 2
B19 H3306B0661 Thread guide 1
B20 HA106B0676 Screw 1
B21 HA310B0702 Thread tension disk 1
B22 H4710C8001 Spring 1
B23 HA115B7010 Thumb nut revolution disc 1
B24 HA310B0701 Thumb nut 1
B25 HA310B0705 Thread tension disc 2
B26 H3221B6816 Pin 1
B27 H3221B0686 Thread tension stud 1
B28 H32481B721 Nut 1
B31 H4713C8001 Spring 1
B32 H32481BD21 Plate complete 1
B33 H4804C8001 Screw 1
B34 H4805C8001 Screw 1
B35 H3230K0751 Screw 1
B36 H3221B6817 Pin 1
B37 H3200B2100 Screw 1
B38 H3221B6819 Stopper 1
B.THREAD TENSION REGULATOR MECHANISM

— 11 —
C.ARM SHAFT MECHANISM

— 12 —
Fig.
No. Part No. Description Pcs. Remarks
C01 HA307C0662 Screw 1
C02 H4706D8001 Needle bar crank 1
C03 HA105D0662 Screw 1
C04 HA100C2060 Screw 1
C05 HA100C2070 Screw 1
C06 H4708D8001 Screw 1
C07 H32111B104 Felt 1
C08 H32111B204 Arm shaft bushing(left) 1
C09 H4709D8001 Shaft 1
C10 H3205C0661 Spring flange 2
C11 HA113F0684 Screw 2
C12 H3205C1021 Belt pulley(upper) 1
C13 HA100F2130 Screw 1
C14 H3205J0662 Bearing 1
C15 H3205J0661 Collar 1
C16 HA110D0672 Screw 2SM15/64(5.95)×28
C17 H4100C2040 Pulley 1
C18 H7104D8001 Belt 1
C19 HA104F0654 Screw 1
C20 H4713D8001 Link 1
C21 H4714D8001 Pin 1
C22 H4716D8001 Spring 1
C23 H007013025 E-type ring 1
C24 H4717D8001 Link 1
C25 H4718D8001 Pin 1
C26 H4719D8001 Link 1
C27 H4715D8001 Pin 1
C28 H4720D8001 Shaft 1
C29 H4721D8001 Screw 1
C30 H4722D8001 Belt pulley(lower) 1
C31 H4723D8001 Screw 2
C.ARM SHAFT MECHANISM

— 13 —
D.UPPER SHAFT & PRESSER FOOT MECHANISM

— 14 —
Fig.
No. Part No. Description Pcs. Remarks
D01 H4705E8001 Feed lifting rock shaft 1
D02 H4707E8001 Bushing 2GB6170-86
D03 H0030550608 Nut 1
D04 H4706E8001 Screw 2
D05 H4709E8001 Crank 1
D06 H3115F0671 Screw 1
D07 H2013J0065 Washer 1
D08 H2014J0066 Connecting rod 1
D09 H2000J2100 Screw 1
D10 H4713E8001 Oil wick 1
D11 H20111C106 Holder 1
D12 H007009250 C-type ring 1
D13 H4714E8001 Eccentric 1
D14 HA307C0662 Screw 2
D15 H4732E8001 Screw 1
D16 H4739E8001 Pin 1
D17 H4735E8001 Link 1
D18 H7104E8001 Link 1
D19 H4741E8001 Collar 1
D20 H4742E8001 Screw 1
D21 H3100G2170 Screw 1
D22 H4730E8001 Lever spring 1
D23 H4729E8001 Screw 1
D24 H4727E8001 Spring 1
D25 H4728E8001 Knee lifting lever 1
D26 H3100G2130 Screw 1
D27 H4726E8001 Nut 1
D28 H4725E8001 Screw 1
D29 HA111G0683 Screw 2
D30 H4723E8001 Guide plate 1
D31 H4754E8001 Presser bar 1
D32 H4744E8001 Bushing 2
D33 H3200E2020 Screw 1
D34 H4746E8001 Spring bracket 1
D35 H4768E8001 Plate 1
D36 H2404I0034 Screw 1
D37 H4748E8001 Lifter lever 1
D38 H4767E8001 Spring 1
D39 H4752E8001 Bracket 1
D40 H4749E8001 Screw 1
D41 H4715E8001 Bell crank 1
D42 H2004J0655 Support shaft 1
D43 H4717E8001 Roller 1
D.UPPER SHAFT & PRESSER FOOT MECHANISM

— 15 —
Fig.
No. Part No. Description Pcs. Remarks
D44 H4718E8001 Screw 1
D45 H2004J0662 Screw 1
D46 H4719E8001 Link 1
D47 HA100E2150 Screw 2
D48 H4722E8001 Washer 2
D49 H4721E8001 Guide 1
D50 H4753E8001 Screw 1
D51 H4708D8001 Screw 2
D52 H7105E8001 Lifting presser foot 1
D.UPPER SHAFT & PRESSER FOOT MECHANISM

— 16 —
E.TAKE-UP THREAD AND ARM SHAFT MECHANISM

— 17 —
Fig.
No. Part No. Description Pcs. Remarks
E01 H2405D1122 Oil wick 1
E02 H4706F8001 Needle bar guide bracket stud 1
E03 H4707F8001 1
E04 HA100C2020 Set screw 1
E05 H2405D1122 Oil wick 1
E06 H2405D1121 Thread take-up lever support stud 1
E07 H4712F8001 Thread take-up lever 1
E08 H2405D1112 Thread take-up slide brock 1
E09 HA110D0672 Screw 1
E10 H24211D405 Oil wick 1
E11 H24211D305 Plug 1
E12 H2405D0662 Needle bar crank pin 1
E13 H4716F8001 Oil wick 1
E14 H4717F8001 Connecting link 1
E15 H4719F8001 Needle bar guide bracket stud 1
E16 H32111D304 Screw 6
E17 H4721F8001 Spacer 2
E19 H4722F8001 Needle bar connecting stud 1
E20 H32111D604 Screw 1
E21 H4806F8001 Needle bar 1
E22 H4725F8001 Vibrating presser bar 1
E23 H3400C2020 Bolt 1
E24 H3200I2030 Washer 1
E25 H3400C2010 Needle bar guide 1
E26 H4726F8001 Vibrating presser bar link 1
E27 H4753E8001 Screw 2
E28 H4728F8001 Guide 1
E29 H4729F8001 Spring 1
E30 H4730F8001 Vibrating presser spring guide 1
E31 H3410C301P Square blcok 1
E32 H3406C0671 Screw 1
E33 H3406C0672 Needle bar vibrating crank(left) 1
E34 H4734F8001 Waher 1
E35 H3204B0652 Bushing 2
E36 H602040240 Taper pin 1
E37 H4736F8001 Needle bar vibrating shaft 1
E38 H32311D506 Nut 1
E39 H2012N0652 Screw 1
E40 H32311D306 Screw 1
E41 H32311D406 Oil wick 1
E42 H3407C0661 Needle bar vibrating crank(right) 1
E43 H8605F8001 Link 1
E44 H3129F0693 Thread guide 1
E.TAKE-UP THREAD AND ARM SHAFT MECHANISM

— 18 —
Fig.
No. Part No. Description Pcs. Remarks
E45 HA100C2170 Screw 1
E46 H3129F0691 Screw 1
E47 H7106F8001 Vibrating presser foot 1
E48 HA700F2100 Screw 1
E.TAKE-UP THREAD AND ARM SHAFT MECHANISM