Janome 990D Service Manual
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Janome 990D Service Manual

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SERVICE MANUAL
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PARTS LIST
990D

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Summary of Contents for Janome 990D

  • Page 1 SERVICE MANUAL & PARTS LIST 990D...

  • Page 2: Table Of Contents

    TABLE OF CONTENTS TO CHANGE THE FACE PLATE UNIT ........................1 TO CHANGE THE BELT COVER UNIT ........................2 TO CHANGE THE TOP COVER ..........................3 TO CHANGE THE FRONT COVER UNIT ......................... 4 TO CHANGE THE SIDE COVER UNIT ........................5 TO CHANGE THE MACHINE BASE UNIT .......................

  • Page 3: To Change The Face Plate Unit

    990D TO CHANGE THE FACE PLATE UNIT To remove: 1. Loosen the setscrew A and remove the face plate unit. To attach: 2. Fit the U-groove of the face plate between the setscrew A and set plate, put the rib of the face...

  • Page 4: To Change The Belt Cover Unit

    990D TO CHANGE THE BELT COVER UNIT To remove: 1. Loosen the setscrew A and remove the setscrew B. 2. Remove the belt cover unit. To attach: 3. Put the ribs of belt cover into the front cover unit and tighten the setscrew A and B.

  • Page 5: To Change The Top Cover

    990D TO CHANGE THE TOP COVER To remove: 1. Remove the face plate unit and belt cover unit. 2. Remove the two setscrews A. Remove the top cover. To attach: 3. Put the ribs of top cover into the front cover unit. Tighten setscrews A.

  • Page 6: To Change The Front Cover Unit

    990D TO CHANGE THE FRONT COVER UNIT To remove: 1. Remove the face cover and belt cover unit. 2. Turn the handwheel toward you with your hand, and set the upper looper at its lowest position, and remove the setscrews A, B, C, D, E and the front cover unit.

  • Page 7: To Change The Side Cover Unit

    990D TO CHANGE THE SIDE COVER UNIT To remove: 1. Loosen the setscrew A and remove the side cover unit. To attach: 2. Fit the U-grooves of the side cover between the setscrews A and the set plate. 3. Tighten the setscrews A.

  • Page 8: To Change The Machine Base Unit

    990D TO CHANGE THE MACHINE BASE UNIT To remove: 1. Remove the setscrews A, B, C, D and two hinge screws E, and remove two base cushions F and washers. 2. Remove the machine base. NOTE: Do not remove another two base cushions.

  • Page 9: To Change The Machine Socket

    990D TO CHANGE THE MACHINE SOCKET To remove: 1. Remove the belt cover unit. 2. Remove the setscrews A and pull out the cord connectors. To attach: 3. Insert the cord connectors as shown below. 4. Attach the machine socket, and tighten two setscrews A and attach the belt cover unit.

  • Page 10: Preparation Before The Adjustment

    990D PREPARATION BEFORE THE ADJUSTMENT Use the following gauges for the correct setting and adjustment. Thickness gauge Needle bar gauge No. 787-G05 No. 787-G02 Thickness gauge No. 787-G03 * Each part, indicated by an alphabet, of the thickness gauge No.787-G05 is used for the following...

  • Page 11: To Adjust The Needle Height

    990D TO ADJUST THE NEEDLE HEIGHT Correct Setting: The distance between the tip of needle on the right and the surface of needle plate should be 11.6 to 12.2 mm when the needle bar is at the highest position. To adjust: 1.

  • Page 12: To Adjust The Presser Bar Height

    990D TO ADJUST THE PRESSER BAR HEIGHT Correct Setting: The distance between the surface of the needle plate and the bottom of presser foot should be 4.7 to 5.3 mm when the presser bar lifter is raised. To adjust: 1. Remove the face plate unit. Remove the setscrews A and the lamp fixing plate.

  • Page 13: To Adjust The Feed Dog Height

    990D TO ADJUST THE FEED DOG HEIGHT Correct Setting: When the presser foot is lowered and feed dog is at its highest position, the distance between the surface of needle plate and bottom of presser foot should be 0.75 to 0.95 mm.

  • Page 14: To Adjust The Timing Of The Needle And The Feed Dog

    990D TO ADJUST THE TIMING OF THE NEEDLE AND THE FEED DOG Correct Setting: When the tip of right needle is at 2 ~ 4 mm above the needle plate in its downward motion, and lowered presserr foot, the top of the feed dog teeth should be level to the top surface of needle plate at their rearmost position.

  • Page 15: To Adjust The Timing Of The Needle And The Upper Knife

    990D TO ADJUST THE TIMING OF THE NEEDLE AND THE UPPER KNIFE Correct Setting: The upper knife timing is the same as that of the needle bar. In fact, when the needle bar is at highest position, the upper knife should be also at its highest position.

  • Page 16: To Adjust The Height Of The Lower Looper

    990D TO ADJUST THE HEIGHT OF THE LOWER LOOPER Correct Setting: The height of lower looper is 65.7 mm from the center of lower looper shaft as shown in illustration. To adjust: 1. Set the upper knife in down postion to loosen setscrew A.

  • Page 17: To Adjust The Clearance Between The Needles And The Lower Looper/Needle Guards

    990D TO ADJUST THE CLEARANCE BETWEEN THE NEEDLES AND THE LOWER LOOPER/NEEDLE GUARDS Correct Setting: Both right and left needles should have an equal clearance between the front edge of the needle holes on the needle plate. The standard clearance between the left and right needle and the lower looper is 0 mm to 0.05 mm.

  • Page 18: To Adjust The Clearance Between The Needles And The Lower Looper/Needle Guards

    990D TO ADJUST THE CLEARANCE BETWEEN THE NEEDLES AND THE LOWER LOOPER/NEEDLE GUARDS...

  • Page 19: To Adjust The Clearance Between The Needles And The Fixed Needle Guard

    990D TO ADJUST THE CLEARANCE BETWEEN THE NEEDLES AND THE FIXED NEEDLE GUARD Correct Setting: The clearance between the needle and the fixed needle guard should be 0.1 to 0.4 mm. To adjust: 1. Remove the presser foot and needle plate and lower the needle to its lowest position.

  • Page 20: To Adjust The Position Of The Chaining Finger

    990D TO ADJUST THE POSITION OF THE CHAINING FINGER Correct Setting: When the needle plate setting knob is set at "S", the chaining finger should touch the side of needle plate, and the tip of the chaining finger should be same level with the tip of the needle on the needle plate.

  • Page 21: To Adjust The Position Of The Upper Looper

    990D TO ADJUST THE POSITION OF THE UPPER LOOPER Correct Setting: When the upper looper is at the left most position, the distance between the center of needle on the right and the center of looper eye should be 4.8 mm to 5.2 mm.

  • Page 22: To Adjust The Timing Of The Needle And The Lower Looper

    990D TO ADJUST THE TIMING OF THE NEEDLE AND THE LOWER LOOPER Correct Setting: When the needle comes up 2.8 mm to 3.2 mm (7/64 to 1/8˝) from its lowest position, the tip of the lower looper meets the left side of the needle (#11) on the right.

  • Page 23: To Adjust The Timing Of The Upper And Lower Loopers

    990D TO ADJUST THE TIMING OF THE UPPER AND LOWER LOOPERS Correct Setting: When the lower looper moves to the right, the tip of upper looper meets the lower looper within 0.2 to 1.2 mm from the left of lower looper eye as shown in Fig.1.

  • Page 24: To Adjust The Clearance Between The Loopers

    990D TO ADJUST THE CLEARANCE BETWEEN THE LOOPERS Correct Setting: When the loopers meet as shown in Fig.2, the clearance should be 0 to 0.1 mm as shown in Fig 1. To adjust: 1. Remove the presser foot and needle plate.

  • Page 25: To Adjust The Clearance Between The Needles And The Upper Looper

    990D TO ADJUST THE CLEARANCE BETWEEN THE NEEDLES AND THE UPPER LOOPER Correct Setting: When the upper looper meets with the needle, the clearance should be 0 to +0.1 mm at the needle on the left side and -0.05 to +0.05 mm at the needle on the right side.

  • Page 26: To Adjust The Position Of The Knives

    990D TO ADJUST THE POSITION OF THE KNIVES Correct Setting: The tip of the lower knife should be leveled with the surface of needle plate. When the upper knife is at the lowest position, the front lower corner of upper knife should be 0.8 to 1.5 mm below the edge of lower knife.

  • Page 27: To Adjust The Position Of The Lower Looper Thread Guide

    990D TO ADJUST THE POSITION OF THE LOWER LOOPER THREAD GUIDE Lower Looper Thread Guide (3) Loosen the setscrew A, and adjust the lower looper thread guide (3) so that the hole of thread guide is in line with the groove of lower looper as shown in Fig. 1.

  • Page 28: To Adjust The Stitch Length

    990D TO ADJUST THE STITCH LENGTH Correct Setting: The actual stitch length should be 2.8 to 3.0 mm when the stitch length dial is set at “3” and differential feed dog at “1.0”. To adjust: 1. Set the stitch length dial at “3” and the differential feed dial at “1.0”.

  • Page 29: To Adjust The Thread Tension Dials

    990D TO ADJUST THE THREAD TENSION DIALS Thread tension dials are already adjusted for general sewing at factory, however, if you want to adjust much stronger or weaker fr special sewing, it can be adjusted as follows: To adjust: 1. Pull out the thread tension dial.

  • Page 30: Parts List

    990D PARTS LIST...
  • Page 31 990D PARTS LIST PARTS DESCRIPTION 789605030 Front cover (unit) 789021140 Front cover 888261007 Sticker 787131001 Looper thread guide 785232007 Looper thread guide 787361002 Looper thread guide 792612007 Check spring (unit) 000149301 Tapping screw 3x8 (B) 785552501 L. needle tension (unit) 785553605 R.
  • Page 32 990D PARTS LIST...
  • Page 33 990D PARTS LIST PARTS DESCRIPTION 789606008 Spool stand (unit) 777011003 Spool stand 784223105 Spool holder 789607009 Thread guide bar (unit) 000115700 TP screw 4x10 000114802 TP screw 4x12 000149301 Tapping screw 3x8 (B) 000081005 Setscrew 4x8 787165004 Side cover hinge base...
  • Page 34 990D PARTS LIST...
  • Page 35 990D PARTS LIST PARTS DESCRIPTION 789671008 Face plate (unit) 787352000 Face plate 840602006 Thread cutter (unit) 787382009 Sticker 787353001 Sticker 000115700 TP screw 4x10 788601000 Needle plate (unit) 789100007 Eccentric pin 000111902 H. socket screw 3x4 681009101 Flat screw 787371201...
  • Page 36 990D PARTS LIST...
  • Page 37 990D PARTS LIST PARTS DESCRIPTION 000061205 Nut 4 787631202 Lamp socket complete (unit) 000070300 Washer 787026002 Lamp socket set plate 655681434 Lamp socket (unit) 023271212 Motor (unit) 777502109 Machine socket (unit) 787204006 Washer (2) 784128028 Machine socket cover 000121905 Tapping screw 4x12 (B)
  • Page 38 990D PARTS LIST...
  • Page 39 990D PARTS LIST PARTS DESCRIPTION Needle bar upper bushing 784027004 H. socket screw 4x4 000111201 Needle bar lower bushing 784028005 Needle bar (unit) 787606002 Needle bar 787015008 Spring pin 1.6x8 000022307 Needle clamp screw (unit) 785557001 Needle clamp 785004020 Needle clamp screw...
  • Page 40 990D PARTS LIST...
  • Page 41 990D PARTS LIST PARTS DESCRIPTION 787618007 Upper looper shaft (unit) 787111005 Upper looper shaft 784076019 Upper looper 000112501 H. socket screw 4x4 784077009 U. looper thread guide 3 000177205 H. socket screw 3x6 787632007 Upper looper pin (unit) 787115009 Upper looper pin...
  • Page 42 990D PARTS LIST...
  • Page 43 990D PARTS LIST PARTS DESCRIPTION 792613008 Chaining finger bracket (unit) 000001609 Snap ring E-5 788106003 Chaining finger set plate 788017003 Chaining finger 787041003 Needle plate setting knob 788018004 Chaining finger spring 000074603 Setscrew 2 x 4 000078320 Setscrew 3 x 6...
  • Page 44 990D PARTS LIST...
  • Page 45 990D PARTS LIST PARTS DESCRIPTION 792604006 Feed bar (unit) 788022001 Main feed bar 788023002 Main feed dog bracket 000104201 Setscrew 3.5 x 10 787054009 Main feed bar drive arm 787055000 000111902 H. socket screw 3 x 4 788024003 Sub feed bar...
  • Page 46 990D PARTS LIST...
  • Page 47 990D PARTS LIST PARTS DESCRIPTION 791618011 Feed adjuster (unit) 789031006 Set plate 787089003 Feed adjuster arm 785156006 Set plate 652056000 Adjustable screw 000160102 Adjustable nut 000036500 Washer 000001609 Snap ring E-5 787264004 Differential rod 785224006 Adjustable screw 785286006 Hinge screw...
  • Page 48 990D PARTS LIST...
  • Page 49 990D PARTS LIST PARTS DESCRIPTION 777870008 Accessory set 784810002 Screwdriver (Large) 647803004 Screwdriver (small) 624801001 Tweezwer 784860100 Needle set 789800222 Instruction book C-2038-1 Foot controller...

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