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MSK-8400B
MSK-8420B
Industrial Sewing Machine
Instruction Manual
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CONTENTS Operation instruction 1. Brief introduction 1 2. Main specifications 1 3. Installation and preparation 1 3.1 Installation 1 3.1.1 Location of the machine 1 3.1.2 Installing oil reservoir 1 3.1.3 Mounting machine head 1 3.1.4 Mounting knee lifter 2 3.1.5 Installing the motor 2 3.1.6 Connecting the clutch lever to the pedal 3 3.1.7 Installing the thread winder 3 3.1.8 Installing the thread spool stand 3 3.2 Preparation 3 3 3.2.1 Cleaning the m
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Parts manual 1. MSK-8420B Arm parts 11 14 2. MSK-8400B Arm parts 15 18 3. Upper shaft and presser foot parts 19 22 4. MSK-8420B Needle bar motion and Lower feed parts 23 26 5. MSK-8400B1 Needle bar motion and Lower feed parts 27 30 6. MSK-8420B Rock shaft and thread looping parts 31 34 7. MSK-8400B Rock shaft and thread looping parts 35 38 8. Stitch length adjusting parts 39 40 9. Knee lifter parts 41 44 10. MSK-8420B Lubrication parts 45 48 11. MSK-8400B Lubrication parts 49 52 12
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1. Brief introduction Both the models adopt straight twin-needle and two horizontal hooks with auto lubrication for thread looping, sliding lever for thread take up to form two lines of lockstitch seam. The upper shaft and lower shaft is connected by ball bearing and driven by teeth-type synchronic belt; plunge oil pump lubrication system. They adopt the compound feed mechanics of feed dog, needle bar and
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3.1.4 Knee control presser foot lifter installation(Fig.3) a. Installing 3 Install Connector () A , Bell Crank () B , Bell (C ) in the order shown in Fig.3. A B C b. Adjustment (Fig.4) 4 In the order of the following: 1.When the presser foot is at its lowest posi- B tion, keep the crank in the position shown by b in the figure, turn Knee Control Stop Adjusting C Screw () C to touch
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3.1.6 Connecting the clutch lever to the pedal (Fig.6) 1)The optimum tilt angle of pedal () A with floor 6 is approx.30 degree. 2)Adjust the clutch of the motor so that clutch G lever() C and draw bar (B) run in line. F 3)The machine balance wheel should rotate coun- terclockwise for normal sewing when view from opposite E side of balance wheel () G . The motor is rotated in the same direction. The rotation can be reversed by reve
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3.2.2 Examination Though every machine is confirmed by strict inspec- 9 tion and test before delivery, the machine parts may be loosed or deformed after long. distance transportation with jolt. A thorough examination must be performed after cleaning the machine . Turn the balance wheel to oil mark see if there is running obstruction, parts collision, uneven resistance or abnormal nosie. If these exist, adjustment must be made according
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4. Operation 4.1 Coordination between needle, thread and sewing material 13 Please use needle DP 17,Nm125-180.The coarseness of needle should be in accordance with the nature of material. If stitch on heavy duty material with a slim A needle, the needle will be easily bent, skip or thread clearance breakage occurs, on the contrary, stitch on tightly woven material with a very coarse needle, the material will be destroyed with over-big n
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4.3.2 Winding adjustment (Fig.15) 1) Wound bobbin thread should be neat and tight, 15 A if not , adjust the thread tension by turning tension B stud thumb nut () A of bobbin winder tension bracket. Note: nylon or polyester thread should be wound C with light tension , otherwise bobbin () D might be broken or deformed. 2) When the wound thread layer does not present a cylindrical shape as in Fig.15a, loosen tension br
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4.3.5 Placing bobbin (Fig.18) Note: when bobbin is placed into the bobbin case, 18 thread the thread should be wound properly in the correct direction shown in the figure. 4.3.6 Drawing thread from the bobbin (Fig.19) sliding plate a. Draw the thread end to Bobbin Slot (1) shown in the figure, and pull it out down through the inner bobbin stop piece. hook b. Hold the thread with left hand , turn the balance
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b. If the needle thread is too loose and the bobbin thread is too tight, then shows as Fig. 20C, And 22 turn the thread tension screw clockwise to increase the needle thread tension; or turn loose the bobbin lace screw to reduce the bobbin thread needle thread tension tension. (See Fig. 21, 22) For special sewing with special thread, the ten- sion needed can be obtained by
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b. When the stop plate stops the balance wheel, more strength is needed to turn the balance 26 wheel to reset the safety clutch device. C. Release the button in the bed. So the resetting of it is OK. (See Fig.26) stop plate 5.3.3 Regulating the strength on the safety clutch 27 device(Fig.27) a. When the white mark of the eccentric pin aims at the
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5.5 Presser foot lift volume adjustment (Fig.29) when stitch on the very elastic material or the 29 thickness of the sewing material is changed. The ad- justment should be done in the following order: crank 1. Loosen the special screw. special screw 2. When the centerline distance between the special screw and the presser foot lift rear crank becomes increase shorter, the presser foot lift volume will become longer. On the coun
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Parts Manual
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1. MSK-8420B Arm Parts 1 13 13 13 13 13 13 28 28 43 43 12 12 18 18 12 12 11 11 10 10 17 17 42 42 41 41 9 9 12 12 7 7 34 34 8 8 33 33 2 2 13 13 13 13 12 12 12 12 6 6 32 32 31 31 37 37 1 1 30 30 40 40 66 66 29 29 65 65 23 23 22 22 19 19 21 2120 20 36 36 27 27 26 26 35 35 3 3 5 5 38 38 4 4 15 15 24 24 25 25 16 16 14 14 39 39 46 46 45 45 47 47 44 44 48 48 55 55 49 49 64 64 50 50 63 63 62 62 51 51 61 61
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1. MSK-8420B Arm Parts Item Part number Description P cs 1. 1WF1-001 Bed 1 2. 1WF1-002 Arm 1 3. Pin 2 4. Screw 1 5. Screw 3 6. 1WF1-041 Trade mark plate 1 7. 1WF1-042 Model plate 1 8. 4 Nail 9. 1WF1-015 Upper thread guide 1 10. 1WF1-016 Screw 2 11. 1WF1-017 Back cover 1 12. 1WF1-011 Screw 15 13. Washer 15 14. 1WF1-032 Cover 2 15. 1WF1-038 Front slide plate 1 16. 1WF1-039 Screw 1 17. 1WF1-019 Tread take-up lever guard 1 18. 1WF1-030 1 Back front cover 19.. 1WF1-027 1 Screw 20. 1WF1-028 Sp
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1. MSK-8420B Arm Parts 1 13 13 13 13 13 13 28 28 43 43 12 12 18 18 12 12 11 11 10 10 17 17 42 42 41 41 9 9 12 12 7 7 34 34 8 8 33 33 2 2 13 13 13 13 12 12 12 12 6 6 32 32 31 31 37 37 1 1 30 30 40 40 66 66 29 29 65 65 23 23 22 22 19 19 21 2120 20 36 36 27 27 26 26 35 35 3 3 5 5 38 38 4 4 15 15 24 24 25 25 16 16 14 14 39 39 46 46 45 45 47 47 44 44 48 48 55 55 49 49 64 64 50 50 63 63 62 62 51 51 61 61
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1. MSK-8420B Arm Parts Item Part number Description P cs 32. 1WF1-012 Guid set plate 1 33. 1WF1-021 1 Set plate 34. 1WF1-020 Oil retainer 1 35. 1WF1-035 Tread releasing lever 1 36. 1WF1-037 Pin shaft 1 37. 1WF1-023 Thread releasing lever 1 38. 1WF1-033 Right sliding plate 1 39. 1WF1-040 Left sliding plate 1 40. 1WF1-029 Plug 1 41. 1WF1-022 Plug 1 42. 1WF1-031 Back fitting cover 1 43. 1WF1-014 1 Plug 44. 1WF1-010A Tread tension set plate assembly 1 45. 1WF1-010B Thread guide bracket 2 46.
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2. MSK-8400B Arm Parts 2 13 13 13 26 41 12 18 12 11 10 17 40 39 9 12 7 32 8 31 2 13 13 12 12 6 30 29 35 1 28 38 63 27 64 20 21 19 25 24 33 3 5 4 15 22 23 16 14 37 43 44 45 42 46 53 47 62 48 61 62 49 59 51 50 58 57 52 54 56 55 -15-
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2. MSK-8400B Arm Parts Item Part number Description P cs 1. 9WF1-007 Bed 1 2. 1WF1-002 Arm 1 3. Pin 2 4. Screw 1 5. Screw 3 6. 9WF1-005 Trade mark plate 1 7. 9WF1-006 Modle plate 1 8. Nail 4 9. 1WF1-015 Upper thread guide 1 10. 1WF1-016 Screw 2 11. 1WF1-017 Back cover 1 12. 1WF1-011 Screw 15 13. Washer 15 14. 1WF1-032 Ccover 2 15. 1WF1-038 Front slide plate 1 16. 1WF1-039 Screw 1 17. 1WF1-019 Thread take-up lever guard 1 18. 1WF1-030 Back front cover 1 19.. 1WF1-005 Screw 1 20. 9WF1-001 L
