Reliable MSK-8420B Instruction Manual
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Reliable MSK-8420B Instruction Manual

Industrial sewing machine
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MSK-8400B
MSK-8420B
Industrial Sewing Machine
Instruction Manual

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  • Page 1 MSK-8400B MSK-8420B Industrial Sewing Machine Instruction Manual...

  • Page 2: Table Of Contents

    Operation instruction 1. Brief introduction 2. Main specifications 3. Installation and preparation 3.1 Installation 3.1.1 Location of the machine 3.1.2 Installing oil reservoir 3.1.3 Mounting machine head 3.1.4 Mounting knee lifter 3.1.5 Installing the motor 3.1.6 Connecting the clutch lever to the pedal 3.1.7 Installing the thread winder 3.1.8 Installing the thread spool stand 3.2 Preparation...
  • Page 3 1. MSK-8420B Arm parts 2. MSK-8400B Arm parts 3. Upper shaft and presser foot parts 4. MSK-8420B Needle bar motion and Lower feed parts 5. MSK-8400B1 Needle bar motion and Lower feed parts MSK-8420B Rock shaft and thread looping parts...

  • Page 4: Brief Introduction

    They are widely used in factories of suitcase, tent, cushion, leather goods, apparel, mat, etc.. The difference between the two models: MSK-8420B adopts twin-needle, two large horizontal hooks with auto lubrication. With the parts it can form ten different needle gauges.

  • Page 5: Mounting Knee Lifter

    3.1.4 Knee control presser foot lifter installation(Fig.3) a. Installing Install Connector A , Bell Crank B , Bell C in the order shown in Fig.3. b. Adjustment (Fig.4) In the order of the following: 1.When the presser foot tion, keep the crank in the position shown by b in the figure, turn Knee Control Stop Adjusting Screw C to touch with the oil reservoir, and...

  • Page 6: Connecting The Clutch Lever To The Pedal

    3.1.6 Connecting the clutch lever to the pedal (Fig.6) 1)The optimum tilt angle of pedal A with floor is approx.30 degree. 2)Adjust the clutch of the motor so that clutch lever C and draw bar B run in line. 3)The machine balance wheel should rotate coun- terclockwise for normal sewing when view from opposite side of balance wheel G .

  • Page 7: Examination

    3.2.2 Examination Though every machine is confirmed by strict inspec- 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 see if there is running obstruction, parts collision, uneven resistance or abnormal nosie.

  • Page 8: Operation

    4. Operation 4.1 Coordination between needle, thread and sewing material 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 needle, the needle will be easily bent, skip or thread breakage occurs, on the contrary, stitch on tightly woven material with a very coarse needle, the material will be destroyed with over-big needle.

  • Page 9: Winding Adjustment

    4.3.2 Winding adjustment (Fig.15) 1) Wound bobbin thread should be neat and tight, if not , adjust the thread tension by turning tension stud thumb nut A of bobbin winder tension bracket. Note: nylon or polyester thread should be wound with light tension , otherwise broken or deformed.

  • Page 10: Setting The Bobbin

    5.1 Thread tension adjustment All forms of stitches are shown in Fig.20. The normal stitch of sewing machine is shown as Fig.(A) If stitch is abnormal , the puckering and thread breakage will occur, and the needle thread tension and bobbin thread tension should be adjusted so that the normal stitch can be obtained.

  • Page 11: Adjusting The Pressure Of Presser Foot

    b. If the needle thread is too loose and the bobbin thread is too tight, then shows as Fig. 20C, And turn the thread tension screw clockwise to increase the needle thread tension; or turn loose the bobbin lace screw to reduce the bobbin thread tension.

  • Page 12: Regulating The Strength On The Safety Clutch Device

    b. When the stop plate stops the balance wheel, more strength is needed to turn the balance wheel to reset the safety clutch device. C. Release the button in the bed. So the resetting of it is OK. (See Fig.26) 5.3.3 Regulating the strength on the safety clutch device(Fig.27) a.

  • Page 13: Presser Foot Lift Volume Adjustment

    5.5 Presser foot lift volume adjustment (Fig.29) when stitch on the very elastic material or the thickness of the sewing material is changed. The ad- justment should be done in the following order: 1. Loosen the special screw. 2. When the centerline distance between the special screw and the presser foot lift rear crank becomes shorter, the presser foot lift volume will become longer.

  • Page 14: Parts Manual

    Parts Manual...

  • Page 15: Msk-8420B Arm Parts

    1. MSK-8420B Arm Parts 42 41 22 21 20 19 61 60 -11- 45 46 46 47 47 48 58 57...
  • Page 16 1. MSK-8420B Arm Parts Item Part number 1WF1-001 1WF1-002 1WF1-041 1WF1-042 1WF1-015 1WF1-016 1WF1-017 1WF1-011 1WF1-032 1WF1-038 1WF1-039 1WF1-019 1WF1-030 19.. 1WF1-027 1WF1-028 1WF1-003 1WF1-004 1WF1-005 1WF1-034 1WF1-036 1WF1-007 1WF1-006 1WF1-018 1WF1-013 1WF1-009 1WF1-008 Description Screw Screw Trade mark plate...
  • Page 17 1. MSK-8420B Arm Parts 42 41 22 21 20 19 61 60 -13- 45 46 46 47 47 48 58 57...
  • Page 18 1. MSK-8420B Arm Parts Item Part number 1WF1-012 1WF1-021 1WF1-020 1WF1-035 1WF1-037 1WF1-023 1WF1-033 1WF1-040 1WF1-029 1WF1-022 1WF1-031 1WF1-014 1WF1-010A 1WF1-010B 1WF1-010C 1WF1-010D 1WF1-010E 1WF1-010M 1WF1-010H 1WF1-010G 1WF1-010S 1WF1-010F 1WF1-010R 1WF1-010Q 1WF1-010J 1WF1-026 1WF1-025 1WF1-010K 1WF1-010I 1WF1-024 1WF1-010L 1WF1-010W 1WF1-010P...

  • Page 19: Msk-8400B Arm Parts

    2. MSK-8400B Arm Parts 40 39 20 21 -15- 43 44 45 46 51 50 56 55...
  • Page 20 2. MSK-8400B Arm Parts Item Part number 9WF1-007 1WF1-002 9WF1-005 9WF1-006 1WF1-015 1WF1-016 1WF1-017 1WF1-011 1WF1-032 1WF1-038 1WF1-039 1WF1-019 1WF1-030 19.. 1WF1-005 9WF1-001 9WF1-002 1WF1-034 1WF1-036 1WF1-007 1WF1-006 1WF1-018 1WF1-013 1WF1-009 1WF1-008 1WF1-012 1WF1-021 Description Screw Screw Trade mark plate Modle plate Nail Upper thread guide...
  • Page 21 2. MSK-8400B Arm Parts 40 39 20 21 -17- 43 44 45 46 51 50 56 55...
  • Page 22 2. MSK-8400B Arm Parts Item Part number 1WF1-020 9WF1-004A 1WF1-043 1WF1-023 1WF1-033 1WF1-040 1WF1-029 1WF1-022 1WF1-031 1WF1-034 1WF1-010A 1WF1-010B 1WF1-010C 1WF1-010D 1WF1-010E 1WF1-010M 1WF1-010H 1WF1-010G 1WF1-010S 1WF1-010F 1WF1-010R 1WF1-010Q 1WF1-010J 1WF1-026 1WF1-025 1WF1-010K 1WF1-003A 1WF1-024 1WF1-010I 1WF1-010W 1WF1-010P 22T2-004 Description Oil retainer Throat plate Spring retaining plate...
  • Page 23 3. Upper Shaft Presser Foot Parts 43 39 40 34 35 37 38 3 36 -19- 8 13 14...
  • Page 24 3. Upper Shaft Presser Foot Parts Item Part number 1WF2-025 1WF2-022 1WF2-023 1WF2-024 1WF2-021 1WF2-020 1WF2-007 1WF2-010 1WF2-009 1WF5-026 1WF5-041 1WF2-026 1WF2-030 1WF2-029 1WF2-031 1WF2-019 19.. 1WF2-032 1WF2-044 1WF2-028 1WF2-039 1WF2-037 1WF2-041 1WF2-040 1WF2-048 1WF2-045 1WF2-042 1WF2-046 1WF2-047 Description Upper shaft Front bushing Screw Oil felt...

  • Page 25: Upper Shaft And Presser Foot Parts 19

    3. Upper Shaft Presser Foot Parts 43 39 40 34 35 37 38 3 36 -21- 8 13 14...
  • Page 26 3. Upper Shaft Presser Foot Parts Item Part number 1WF2-038 1WF5-001 1WF5-025 1WF5-044 1WF5-023 1WF5-024 1WF5-045 1WF4-018 1WF5-038 1WF5-028 1WF5-037 1WF5-030 1WF5-029 1WF5-032 1WF5-033 1WF5-034 1WF5-035 1WF5-042 1WF2-027 1WF2-037 Description Screw Connecting lever Connecting screw Washer Oil tube assembly Sping Presser foot lift rear crank Screw Presser foot lift front crank...
  • Page 27 4. MSK-8420B Needle Bar And Lower Feed Parts 72 71 70 74 73 77 76 75 67 66 64 65 63 54 57 56 7 8 9 12 13 38 40 43 42 44 59 61 60 59 63 62 58 45 57 56 55 54...
  • Page 28 4. MSK-8420B Needle Bar And Lower Feed Parts Item Part number 1WF5-017 1WF5-018 1WF5-031 1WF5-019 1WF2-018 1WF2-017 1WF2-016 1WF2-011 1WF2-019 1WF2-012 1WF2-013 1WF2-014 1WF2-015 1WF2-008 1WF5-011 1WF5-013 1WF5-012 1WF2-007 19.. 1WF2-005 1WF2-006 1WF2-004 1WF5-006 1WF5-010 1WF5-009 1WF5-036 1WF3-009 1WF5-014 1WF5-016...

  • Page 29: Msk-8420B Needle Bar Motion And Lower Feed Parts 23

    4. MSK-8420B Needle Bar And Lower Feed Parts 72 71 70 74 73 77 76 75 67 66 64 65 63 54 57 56 7 8 9 12 13 38 40 43 42 44 59 61 60 59 63 62 58 45 57 56 55 54...
  • Page 30 4. MSK-8420B Needle Bar And Lower Feed Parts Item Part number 1WF5-027 1WF5-028 1WF5-048 1WF4-018 1WF5-005 1WF5-004 1WF5-003 1WF5-049 1WF5-002 1WF5-046 1WF5-047 1WF5-001 1WF4-052 1WF2-023 1WF4-054 1WF2-009 41WF3-017 1WF4-019 1WF4-020 1WF4-037 1WF4-038 1WF4-035 1WF4-034 1WF4-029 1WF4-030 1WF4-036 1WF4-031 9WF4-001 1WF4-032...
  • Page 31 5. MSK-8400B Needle Bar And Lower Feed Parts 72 71 70 74 73 77 76 75 67 66 64 65 63 54 57 56 7 8 9 12 13 38 40 43 42 44 59 61 60 59 63 62 58 45 57 56 55 54 -27- 43 45 46 47 48...
  • Page 32 5. MSK-8400B Needle Bar And Lower Feed Parts Item Part number 1WF5-017 1WF5-018 1WF5-031 1WF5-019 1WF2-018 1WF2-017 1WF2-016 1WF2-011 1WF2-019 1WF2-012 1WF2-013 1WF2-014 1WF2-015 1WF2-008 1WF5-011 1WF5-013 1WF5-012 1WF2-007 19.. 1WF2-005 1WF2-006 1WF2-001 1WF5-006 1WF5-010 22T1-007 1WF5-009 1WF5-036 1WF3-009 1WF5-014 1WF5-016 1WF5-015 35T5-502...
  • Page 33 5. MSK-8400B Needle Bar And Lower Feed Parts 72 71 70 74 73 77 76 75 67 66 64 65 63 54 57 56 7 8 9 12 13 38 40 43 42 44 59 61 60 59 63 62 58 45 57 56 55 54 -29- 43 45 46 47 48...
  • Page 34 5. MSK-8400B Needle Bar And Lower Feed Parts Item Part number 1WF5-027 1WF5-028 1WF5-048 1WF4-018 1WF5-005 1WF5-004 1WF5-003 1WF5-049 1WF5-002 1WF5-046 1WF5-047 1WF5-001 1WF4-052 1WF2-023 1WF4-054 1WF2-009 41WF3-016 1WF4-019 1WF4-020 1WF4-037 1WF4-038 1WF4-035 1WF4-034 1WF4-030 1WF4-029 1WF4-036 1WF4-031 9WF4-001 1WF4-032 9WF4-002A 1WF4-007 1WF4-008...
  • Page 35 6. MSK-8420B Rock Shaft And Thread Looping Parts 31 32 34 35 39 40 41 42 43 53 54 £- 31£- 50 51 52 47 48...
  • Page 36 6. MSK-8420B Rock Shaft And Thread Looping Parts Item Part number 1WF2-063 1WF2-060 1WF2-059 1WF2-061 1WF2-064 1WF2-065 1WF2-070 1WF2--069 1WF2-072 1WF2-071 1WF2-075 1WF5-026 1WF2-076 1WF2-074 1WF2-062 1WF2-034 19.. 1WF2-033 1WF2-077 1WF2-067 1WF2-066 1WF2-044 1WF2-068 1WF2-052 1WF2-078 1WF2-009 1WF2-079 1WF2-055 1WF2-035...

  • Page 37: Msk-8420B Rock Shaft And Thread Looping Parts 31

    6. MSK-8420B Rock Shaft And Thread Looping Parts 31 32 34 35 39 40 41 42 43 53 54 £- 33£- 50 51 52 47 48...
  • Page 38 6. MSK-8420B Rock Shaft And Thread Looping Parts Item Part number 1WF2-036 1WF2-056 1WF2-006 1WF2-019 1WF2-057 1WF2-058 1WF4-041 1WF4-042 1WF4-010 1WF4-011 1WF4-012 1WF2-055 1WF2-051 1WF2-009 1WF2-052 1WF2-050 1WF2-049 1WF4-044 1WF4-043 Description Oil wick Rock shaft Feed dog lift cam Set screw...
  • Page 39 7.MSK-8400B Rock Shaft And Thread Looping Parts 30 31 33 34 38 39 40 41 42 -35- 49 50 51 46 47 52 53...
  • Page 40 7.MSK-8400B Rock Shaft And Thread Looping Parts Item Part number 1WF2-063 1WF2-060 1WF2-059 1WF2-061 1WF2-064 1WF2-065 1WF2-070 1WF2--069 1WF2-072 1WF2-071 1WF2-075 1WF5-026 1WF2-076 1WF2-074 1WF2-062 1WF2-034 1WF2-033 1WF2-077 1WF2-067 1WF2-066 1WF2-044 1WF2-052 1WF2-078 1WF2-009 1WF2-079 1WF2-055 1WF2-035 1WF2-036 Description Right hook saddle Screw Upper bushing of hook saddle Lower bushing of hook saddle...

  • Page 41: Msk-8400B Rock Shaft And Thread Looping Parts 35

    7.MSK-8400B Rock Shaft And Thread Looping Parts 30 31 33 34 38 39 40 41 42 -37- 49 50 51 46 47 52 53...
  • Page 42 7.MSK-8400B Rock Shaft And Thread Looping Parts Item Part number 1WF2-056 1WF2-006 1WF2-019 1WF2-057 1WF2-058 1WF2-041 1WF4-0421WF4-042 1WF4-010 1WF4-011 1WF4-012 1WF2-055 1WF2-051 1WF2-009 1WF2-052 1WF2-050 1WF2-049 1WF4-044 1WF4-043 Description Rock shaft Feed dog lift cam Set screw Right bushing for rock shaft Oil wick Split stop ring Spring...

  • Page 43: Stitch Length Adjusting Parts

    8.Stitch Length Adjusting Parts 16 15 30 29 28 26 -39-...
  • Page 44 8.Stitch Length Adjusting Parts Item Part number 1WF4-025 1WF4-030 1WF4-026 1WF4-014 1WF4-028 1WF4-046 1WF4-047 1WF4-027 1WF4-021 1WF4-048 1WF4-040 1WF4-049 1WF4-050 1FW4-051 1WF4-024 1WF5-006C3 1WF4-023 1WF4-022 1WF5-009 1WF4-013 1WF4-015 1WF2-038 1WF4-016 1WF4-053 1WF4-057 1WF4-045 1WF4-039 1WF4-056 1WF1-011 Description Stitch length adjusting swing lever Screw Set screw Stitch length link...
  • Page 45 9.Presser Foot Lift Parts -41-...
  • Page 46 9.Presser Foot Lift Parts Item Part number 1WF5-040 1WF5-039 1WF3-011 1WF3-010 1WF3-013 1WF3-014 1WF3-012 1WF3-015 1WF3-016 1WF3-018 1WF3-017 1WF3-019 1WF3-021 1WF3-020 1WF3-024 1WF3-025 1WF3-001(9WF3-001) 1WF3-002 1WF3-004 1WF3-005 1WF2-006 1WF3-023 1WF3-022 1WF3-007 1WF3-008 1WF3-009 1WF3-003 1WF3-023 1WF3-006 22F9-012 58F0-001A1 58F0-001 Description Sliding block rail Screw Screw...
  • Page 47 9.Presser Foot Lift Parts -43-...
  • Page 48 9.Presser Foot Lift Parts Item Part number 22T9-001A2 22T9-001A3 1WF3-028 22T9-001A9 22T9-001A10 22T9-007C2 22T9-001A7 1WF3-027 22T9-003B4 22T9-003B3 22T9-003B2 22T9-003B7 22T9-003B6 22T9-003B5 22T9-003B8 1WF3-026 Description Screw Washer Retain ring Knee lifter stop bracket Adjust screw Adjust nut Screw Position spring Hinge pin Screw Connector Bent rod...
  • Page 49 10.MSK-8420B Lubrication Parts 48 21 47 16 46 49 20 23 45 35 34 16 36 23 38 23 -45- 16 30 29...
  • Page 50 10.MSK-8420B Lubrication Parts Item Part number 1WF6-001 1WF6-034 1WF6-003 1WF6-005A 1WF6-004 1WF6-007 1WF6-008 1WF6-009 1WF6-006 1WF6-010 1WF6-011 1WF6-002 1WF6-013 1WF6-012 1WF1-024 1WF6-042 1WF6-014 1WF1-011 22T1-007 1WF6-021 1WF1-026 1WF2-053 1WF2-054 1WF6-027 1WF6-025 1WF6-024 1WF6-023 1WF6-026 1WF6-018 Description Oil felt press spring...

  • Page 51: Msk-8420B Lubrication Parts 45

    10.MSK-8420B Lubrication Parts 48 21 47 16 46 49 20 23 45 35 34 16 36 23 38 23 -47- 16 30 29...
  • Page 52 10.MSK-8420B Lubrication Parts Item Part number 1WF6-019 1WF6-020 1WF6-017 1WF6-028 1WF6-035 1WF6-036 1WF6-038 1WF6-041 1WF6-040 1WF6-039 1WF6-034 1WF6-032 1WF6-037 1WF6-033 1WF6-030 1WF6-031 1WF6-029 1WF6-015 Description Washer Filter screw Oil filter bracket Oil pipe clamp Oil pipe Oil pipe clamp Oil tray assembly...
  • Page 53 11.MSK-8400B Lubrication Parts 11 12 8 10 38 23 37 36 -49- 13 14...
  • Page 54 11.MSK-8400B Lubrication Parts Item Part number 1WF6-001 1WF6-034 1WF6-003 1WF6-005A 1WF6-004 1WF6-007 1WF6-008 1WF6-009 1WF6-006 1WF6-010 1WF6-011 1WF6-002 1WF6-013 1WF6-012 1WF1-024 1WF6-042 1WF6-014 1WF1-011 22T1-007 1WF6-021 1WF1-026 1WF2-053 1WF2-054 1WF6-027 1WF6-025 1WF6-024 1WF6-023 1WF6-026 1WF6-018 Description Oil felt press spring Screw Oil felt Oil pipe...
  • Page 55 11.MSK-8400B Lubrication Parts 11 12 8 10 38 23 37 36 -51- 13 14...
  • Page 56 11.MSK-8400B Lubrication Parts Item Part number 1WF6-019 1WF6-020 1WF6-017 1WF6-028 1WF6-035 1WF6-036 1WF6-038 1WF6-041 1WF6-040 1WF6-034 1WF6-032 1WF6-037 1WF6-033 1WF6-031 1WF6-015 Description Washer Filter screen Oil filter bracket Oil pipe clamp Oil pipe Pipe clamp Oil tray assembly Oil wick Oil pipe Pipe clamp Oil pipe...
  • Page 57 12.Accessories 18 18 -53-...
  • Page 58 12.Accessories Item Part number 33TF-010 22T9-007F1 22T9-007F2 22T9-009 22T9-010 1WF2-065 33TF-011 33TF-016 1F-009 1F-011 1F-010 33TF-012 33TF-013 33TF-014 58T0-007C 22T9-018 1F-012 S14420020 1F-014(33TF-019) Description Accessories bag Hinge pin Hinge pin socket Cushion Cushion Bobbin Oil pot V-belt Needle Hex key Hex key Screwdriver Screwdriver...
  • Page 59 www.reliablecorporation.com...

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