Janome AirThread 2000D Service Manual
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Janome AirThread 2000D Service Manual

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Second Edition: xx May 2018
SERVICE MANUAL
MODEL: AirThread 2000D

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Summary of Contents for Janome AirThread 2000D

  • Page 1 Second Edition: xx May 2018 SERVICE MANUAL MODEL: AirThread 2000D...

  • Page 2: Table Of Contents

    Top Cover Required Tools ............................1 Replacing External Parts Top cover ............................... 2 Face plate (1) ............................3 Face plate (2) ............................4 Belt cover .............................. 5 Base plate ............................. 6 Looper cover ............................7 Front cover ............................8 Side cover ............................. 9 Rear cover ............................

  • Page 3: Required Tools

    Required Tools Plate gauge Guide line Position of the lower looper tip Lower looper height gauge Lower looper height Timing gauge Travel Needle bar gauge Position of the upper looper tip Upper looper tip gauge Bulge Not gauge. If threading special threads, such as wooly nylon. Looper threading wire to clean the pipe of the looper.

  • Page 4: Replacing External Parts

    MODEL: AirThread 2000D Replacing External Parts Top cover Top cover To remove: 1. Remove the setscrews (2 pcs.) on the rear side of the top cover. Setscrew 2. Release the hooks of the top cover from the front cover. Front cover Hook 3.

  • Page 5: Face Plate (1)

    MODEL: AirThread 2000D Replacing External Parts Face plate (1) Face plate To remove: 1. Remove the top cover. 2. Remove the cap. 3. Remove the setscrew. Setscrew Face plate Needle treader lever 4. Slightly lower the needle threader lever and remove...

  • Page 6: Face Plate (2)

    MODEL: AirThread 2000D Replacing External Parts Face plate (2) To attach: 1. Attach the face plate in place. Hold the face plate with your finger. Front cover 2. Pull the front cover lightly and place the ribs into the inside of the front cover.

  • Page 7: Belt Cover

    MODEL: AirThread 2000D Replacing External Parts Belt cover Looper cover To remove: Belt cover 1. Remove the top cover. 2. Open the looper cover. 3. Remove the cap. 4. Remove the setscrew A. Setscrew A 5. Loosen the setscrew B on the base.

  • Page 8: Base Plate

    MODEL: AirThread 2000D Replacing External Parts Base plate Base plate Hinge screw Hinge screw Rubber Rubber sole (unit) sole (unit) To remove: 1. Open the side cover. 2. Remove the hinge screw (3 pcs.) and remove the rubber soles (unit).

  • Page 9: Looper Cover

    MODEL: AirThread 2000D Replacing External Parts Looper cover Looper cover Hook of looper cover position detecting arm Setscrew Looper Setscrew cover shaft To remove: 1. Remove the base plate. 2. Remove the setscrews (2 pcs.). 3. Release the hook of looper cover position detecting arm from the looper cover shaft.

  • Page 10: Front Cover

    MODEL: AirThread 2000D Replacing External Parts Front cover Front cover To remove: 1. Remove the top cover, the face plate, the belt cover, the base plate and the looper cover. 2. Set the upper looper to the lowest position by turning the handwheel toward you.

  • Page 11: Side Cover

    MODEL: AirThread 2000D Replacing External Parts Side cover Side cover Setscrew To remove: 1. Open the side cover as far as it will go. 2. Remove the setscrews (2 pcs.). 3. Remove the side cover. Setscrew Groove of the rear cover...

  • Page 12: Rear Cover

    MODEL: AirThread 2000D Replacing External Parts Rear cover Thread guide base Rear cover To remove: 1. Remove the face plate, the belt cover and the side cover. 2. Remove the setscrews A (2 pcs.) on the carrying handle. Setscrew A...

  • Page 13: Mechanical Adjustment

    MODEL: AirThread 2000D Mechanical Adjustment To adjust the needle bar height The distance between the tip of the right needle (HA x 1SP#14) and the surface of the needle plate should be 11.6 to 12.2 mm when the needle is at the heighest position.

  • Page 14: To Adjust The Presser Foot Bar Height

    MODEL: AirThread 2000D Mechanical Adjustment To adjust the presser bar height The distance between the bottom of the presser foot and the surface of the needle plate should be in the range of 5.2 mm to 5.8 mm when the presser foot is raised.

  • Page 15: To Adjust The Feed Dog Height

    MODEL: AirThread 2000D Mechanical Adjustment To adjust the feed dog height The highest position of the feed dog should be 0.9 to 1.1 mm from the surface of the needle plate. To check: 1. Set the presser foot pressure dial to “N”.

  • Page 16: To Adjust The Differential Feed

    MODEL: AirThread 2000D Mechanical Adjustment To adjust the differential feed Set the stitch length dial set to “3” and the differential feed dial to “1.0”. The gap (a) is the gap between the main feed dog and the sub feed dog when ascending to the level of the needle plate.

  • Page 17: To Adjust The Stitch Length

    MODEL: AirThread 2000D Mechanical Adjustment To adjust the stitch length The actual stitch length should be 3.0 to 3.2 mm (30 to 32 mm for 10 stitches) when the stitch length dial is set to “3” and the differential feed dial to “1.0”.

  • Page 18: To Adjust The Timing Of The Needle And The Upper Knife

    MODEL: AirThread 2000D Mechanical Adjustment To adjust the timing of the needle and the upper knife The upper knife timing is the same as that of the needle bar. In fact, when the needle bar is at the highest position, the upper knife should be also at the highest position.

  • Page 19: To Adjust The Positions Of The Upper Knife And The Lower Knife

    MODEL: AirThread 2000D Mechanical Adjustment To adjust the position of the upper knife and the lower knife When the upper knife is at the lowest position, the front lower corner of the upper knife should be 1.0 to 2.0 mm below the edge of the lower knife.

  • Page 20: To Replace The Lower Looper

    MODEL: AirThread 2000D Mechanical Adjustment To replace the lower looper To remove: 1. Open the looper cover (unit) and the side cover (unit). Upper knife 2. Set the chaining finger switch knob to “R” and lower the chaining finger. Bolt 3.

  • Page 21: To Adjust The Position Of The Lower Looper (1)

    MODEL: AirThread 2000D Mechanical Adjustment To adjust the position of the lower looper (1) The tip of the lower looper is 65.6 to 65.9 mm from the center of the lower looper crank shaft as shown below. To check: 1. Open the looper cover and the side cover.

  • Page 22: To Adjust The Position Of The Lower Looper (2)

    MODEL: AirThread 2000D Mechanical Adjustment To adjust the position of the lower looper (2) To adjust: Upper knife 1. Open the looper cover and the side cover. Bolt 2. While pressing the upper knife release knob, turn it clockwise by half a rotation to deactivate the upper Needle plate knife.

  • Page 23: Needle Guard (Front) (1)

    MODEL: AirThread 2000D Mechanical Adjustment To adjust the clearance of the needle and the lower looper; and the clearance of the needle and the needle guard (front) (1) The standard clearance between the groove of the needle (HAx1 SP #14) and the tip of the lower looper is 0 to 0.05 mm when the needle and the lower looper intersect.

  • Page 24: Needle Guard (Front) (2)

    MODEL: AirThread 2000D Mechanical Adjustment To adjust the clearance of the needle and the lower looper; and the clearance of the needle and the needle guard (front) (2). To replace the needle guard (front). The standard clearance between the groove of the needle (HAx1 SP #14) and the tip of the lower looper is 0 to 0.05 mm when the needle and the lower looper intersect.

  • Page 25: To Adjust The Clearance Of The Needle And Needle Guard (Rear)

    MODEL: AirThread 2000D Mechanical Adjustment To replace the needle guard (front). To adjust the clearance of the needle and the needle guard (rear). With the needle deflected by the needle guard (front), the standard clearance between the part of the largest diameter of the tip of the needle (HAx1 SP #14) and the needle guard (rear) is 0.05 to 0.25 mm.

  • Page 26: To Adjust The Timing Of The Needle And The Lower Looper

    MODEL: AirThread 2000D Mechanical Adjustment To adjust the timing of the needle and the lower looper When the needle comes up 3.4 to 3.8 mm from the lowest position, the tip of the lower looper comes to the left side of the right needle (HAx1 SP #14).

  • Page 27: To Replace The Upper Looper And To Adjust The Position Of The Tip Of The Upper Looper

    MODEL: AirThread 2000D Mechanical Adjustment To replace the upper looper and to adjust the position of the tip of the upper looper To replace the upper looper To remove: Setscrew Upper 1. Open the looper cover and the side cover.

  • Page 28: To Adjust The Leftmost Position Of The Upper Looper

    MODEL: AirThread 2000D Mechanical Adjustment To adjust the leftmost position of the upper looper When the upper looper is at the leftmost position, the distance (front view) between the center of right needle and the tip of the upper looper should be 7.8 to 8.2 mm.

  • Page 29: To Adjust The Timing Of The Upper Looper And The Lower Looper

    MODEL: AirThread 2000D Mechanical Adjustment To adjust the timing of the upper looper and the lower looper When the lower looper moves to the right from the leftmost position and the tip of the upper looper meets the lower edge of the lower looper as shown in the Fig. 1, the standard distance (front view) between the tip of upper looper and the tip of the lower looper is 3.5 to 4.1 mm.

  • Page 30: To Adjust The Clearance Of The Upper Looper And The Lower Looper

    MODEL: AirThread 2000D Mechanical Adjustment To adjust the clearance of the upper looper and the lower looper When the lower looper moves to the right from the leftmost position, the upper looper moves upward from the lowest position, and the tip of the upper looper comes behind the rear surface of the lower looper as shown in the figure, the standard distance between the tip of upper looper and the rear surface of the lower looper is 0 to 0.1 mm.

  • Page 31: To Adjust The Clearance Between The Needle And The Upper Looper

    MODEL: AirThread 2000D Mechanical Adjustment To adjust the clearance between the needle and the upper looper When the upper looper meets the right needle or the left needle, each clearance should be -0.05 to +0.05 mm. To check: 1. Turn the handwheel toward you until the upper looper...

  • Page 32: To Adjust The Position Of The Chaining Finger

    MODEL: AirThread 2000D Mechanical Adjustment To adjust the position of the chaining finger The standard distance between the side edge of the needle plate and the left edge of the chaining finger is 0.2 mm. The side edge of the needle plate should not interfere with the left edge of the chaining finger. When setting the chaining finger switch knob to “S”, the tip of the chaining finder should align with the point of the needles on the needle plate.

  • Page 33: To Adjust The Thread Tensions

    MODEL: AirThread 2000D Mechanical Adjustment To adjust the thread tensions Use a standard thread #50. Do not pass the thread through the top cover thread guide. Standard tension: Left needle: Tension dial set to 3, 30-40 gf, Tension dial set to 9, 80 gf or more...

  • Page 34: To Adjust The Pre-Tension

    MODEL: AirThread 2000D Mechanical Adjustment To adjust the pre-tension Use a standard thread #50 to check the tension of the looper pre-tension. Standard tension: Lower looper pre-tension setting slider set to “STD.”: 1 gf or less. Lower looper pre-tension setting slider set to “TIGHT”: 45-55 gf.
  • Page 35 MODEL: AirThread 2000D Mechanical Adjustment To adjust the needle threader The hook of the needle threader should come through the eye of the needle. To check: Setscrew A Threader plate (unit) 1. Attach HAx1 SP #11 needles as the left and right Needle threader needles.

  • Page 36: To Adjust The Position The Looper Thread Take-Up Lever

    MODEL: AirThread 2000D Mechanical Adjustment To adjust the position the looper thread take-up lever When the upper looper is in the lowest position, the looper thread take-up lever should be upright. In case the position of looper take-up lever cannot be adjusted completely after adjusting the looper threader (air), adjustment of the looper threader (air) is preferable to adjustment of the looper take-up lever.

  • Page 37: To Adjust The Looper Threader (Air) (2)

    MODEL: AirThread 2000D Mechanical Adjustment To adjust the looper threader (air) (1) When threading the upper looper or the lower looper with a standard thread #60, a thread of 30 mm or longer should come out from the hole of the looper.

  • Page 38: To Adjust The Needle Threader

    MODEL: AirThread 2000D Mechanical Adjustment To adjust the looper threader (air) (2) When threading the upper looper or the lower looper with a standard thread #60, the thread of 30 mm or longer should come out from the hole of the looper.

  • Page 39: To Adjust The Height Of The Rubber Sole (Rear Left)

    MODEL: AirThread 2000D Mechanical Adjustment To adjust the height of the rubber sole (rear left) The adjustable rubber sole (rear left) is 0.6 mm higher (above the level) than the other 3 rubber soles. To check: 1. Place the machine with the rear cover down.

  • Page 40: Replacing External Parts

    MODEL: AirThread 2000D Replacing External Parts To replace the machine socket To remove: 1. Remove the belt cover and the rear cover. Setscrew A Setscrew A 2. Remove the setscrews A (2 pcs.). Pull the machine socket by the allowance length of the cable, and remove the connector (LED).
  • Page 41 MODEL: AirThread 2000D Replacing External Parts To replacing the motor (1) To remove: 1. Remove the belt cover, the rear cover and the machine socket (unit). 2. Remove the setscrews A (2 pcs.). 3. Remove the motor. 4. Remove the setscrews B (2 pcs.).

  • Page 42: To Replace The Motor (1)

    MODEL: AirThread 2000D Replacing External Parts To replace the motor (2) To attach: Follow the procedure on the previous page. 6. Attach the motor belt on the belt wheel and the motor pulley. Check if the motor belt tension is correct.

  • Page 43: To Replace The Led

    MODEL: AirThread 2000D Replacing External Parts To replace the LED To remove: 1. Remove the top cover, the face plate, the belt cover, the front cover, the rear cover and the machine socket Connector (LED) (unit). 2. Remove the connector (LED) from the machine socket (unit).

  • Page 44: To Change The Micro Switch (To Detect Covers And The Looper Threader Switch Lever)

    MODEL: AirThread 2000D Replacing External Parts To change the micro switch (covers and looper threader switch lever) To remove: 1. Remove the belt cover. Switch set plate 1 2. Remove the setscrew A and remove the switch set plate 1.

  • Page 45: To Change The Micro Switch (To Detect The Presser Foot Lifter)

    MODEL: AirThread 2000D Replacing External Parts To change the micro switch (presser foot lifter) To remove: 1. Remove the belt cover. Micro switch 2. Remove the setscrew A and remove the switch set Switch set plate 2 plate 2. Thread tension set plate 3.

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