Janome MS5027PR Service Manual
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Janome MS5027PR Service Manual

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SERVICE MANUAL
SEWING MACHINE MODEL
MS5027PR

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Summary of Contents for Janome MS5027PR

  • Page 1 SERVICE MANUAL SEWING MACHINE MODEL MS5027PR...

  • Page 2: Table Of Contents

    CONTENTS LOCATE AND IDENTIFY THE PARTS ................. 1 WHAT TO DO WHEN ....................2-4 THREADING OF MACHINE ..................5-6 SERVICE ACCESS FACE COVER ....................... 7 TOP COVER ......................7 BASE PLATE ......................8 BED COVER ......................8 BELT COVER ....................... 9 FREE ARM COVER .....................

  • Page 3: Locate And Identify The Parts

    MS5027PR LOCATE AND IDENTIFY THE PARTS Spool Pin Upper Thread Guide Bobbin Winding Spindle Take-up Lever Stitch Width Control Stitch Length Control Stitch Length Setting Display Top Tension Control Stitch Width Setting Display Face Cover Plate Thread Cutter Needle Threader...

  • Page 4: What To Do When

    MS5027PR WHAT TO DO WHEN CONDITION CAUSE HOW TO FIX REFERENCE 1. SKIPPING 1. NEEDLE IS NOT INSERTED INSERT THE NEEDLE PROPERLY. STITCHES PROPERLY. 2. NEEDLE IS BENT OR WORN. CHANGE THE NEEDLE. 3. INCORRECTLY THREADED RETHREAD. 4. NEEDLE OR THREAD ARE...
  • Page 5 MS5027PR CONDITION CAUSE HOW TO FIX REFERENCE 3. BREAKING 1. INITIAL SEWING SPEED IS START WITH MEDIUM SPEED. UPPER TOO FAST. THREAD 2. THREAD PATH IS USE THE PROPER THREAD INCORRECT. PATH. 3. NEEDLE IS BENT OR DULL. REPLACE WITH A NEW NEEDLE.
  • Page 6 MS5027PR CONDITION CAUSE HOW TO FIX REFERENCE 6. NOISY 1. BACKLASH BETWEEN SEE MECHANICAL P.25 OPERATION HOOK GEAR AND LOWER ADJUSTMENT “BACKLASH SHAFT GEAR IS TOO (LOWER SHAFT GEAR).” GREAT. 2. LOWER SHAFT GEAR IS ELIMINATE THE LOOSENESS. LOOSE. 3. INAPPROPRIATE BELT SEE MECHANICAL P.36...

  • Page 7: Threading Of Machine

    MS5027PR THREADING OF MACHINE THE NUMBERED STEPS BELOW FOLLOW THE NUMBERS ON THE ILLUSTRATIONS. DOTTED LINES SHOW THE PLACES WHERE THE THREAD LOOPS AND IS THEN PULLED TIGHT. RAISE THE TAKE-UP LEVER TO ITS HIGHEST POSITION BY TURNING THE HANDWHEEL TOWARD YOU.
  • Page 8 MS5027PR AUTOMATIC NEEDLE THREADER LOWER THE PRESSER FOOT. DEPRESS THE NEEDLE THREADER KNOB AS FAR AS IT WILL GO. THE HOOK COMES OUT THROUGH THE NEEDLE EYE FROM BEHIND. NEEDLE THREADER KNOB HOOK DRAW THE THREAD DOWN AROUND THE THREADER GUIDE AND UNDER THE HOOK.

  • Page 9: Service Access

    MS5027PR SERVICE ACCESS FACE COVER (TO REMOVE) OPEN THE FACE COVER (A). REMOVE THE SETSCREWS (B) AND TAKE THE FACE COVER (A) OFF. (TO ATTACH) FOLLOW THE ABOVE PROCEDURE IN REVERSE. TOP COVER (TO REMOVE) OPEN THE FACE COVER (A).

  • Page 10: Base Plate

    MS5027PR SERVICE ACCESS BASE PLATE (TO REMOVE) REMOVE THE FOUR SETSCREWS (A) AND REMOVE THE BASE PLATE (B). (TO ATTACH) FOLLOW THE ABOVE PROCEDURE IN REVERSE. BED COVER (TO REMOVE) REMOVE THE TWO SETSCREWS (D) AND REMOVE THE BED COVER (E).

  • Page 11: Belt Cover

    MS5027PR SERVICE ACCESS BELT COVER BELT COVER PROJECTION STITCH SELECTOR LATCH PULL OUT THE STITCH SELECTOR. LOOSEN THE SETSCREW (A) AND REMOVE THE SETSCREW (B). PULL THE RIGHT SIDE OF BELT COVER IN THE DIRECTION OF THE ARROW, AS ILLUSTRATED AND TAKE THE LATCH OFF, AND THEN REMOVE THE BELT COVER.

  • Page 12: Front Cover

    MS5027PR SERVICE ACCESS FRONT COVER (TO REMOVE) OPEN THE FACE COVER . REMOVE THE TOP COVER (SEE PAGE 7), AND THE BELT COVER (SEE PAGE 9). REMOVE THE SETSCREWS (A) AND (B). LOOSEN SETSCREWS (C) AND (D), THEN REMOVE THE FRONT COVER (E).

  • Page 13: Rear Panel

    MS5027PR SERVICE ACCESS REAR PANEL TWIST AND REMOVE THE ARM COVER PRESSER FOOT LEVER PART FROM THE PRESSER FOOT LEVER. REAR PANEL UNIT (TO REMOVE) OPEN THE FACE COVER. REMOVE THE TOP COVER UNIT (SEE PAGE 7), THE BELT COVER (SEE PAGE 9) AND THE FRONT COVER (SEE PAGE 10).

  • Page 14: Mechanical Adjustment

    MS5027PR MECHANICAL ADJUSTMENT TOP TENSION TO CHECK: SET THE TENSION DIAL AT "4", AND RAISE THE PRESSER FOOT. PASS THE THREAD (A) BETWEEN THE DISCS, AND DRAW THE THREAD (A) DOWN AROUND THE CHECK SPRING HOLDER AS IN FIG. 1.

  • Page 15: Presser Bar Height And Alignment

    MS5027PR MECHANICAL ADJUSTMENT PRESSER BAR HEIGHT AND ALIGNMENT TO CHECK: RAISE THE PRESSER FOOT LEVER (B). THE DISTANCE BETWEEN THE ZIGZAG FOOT (A) AND THE NEEDLE PLATE (C) SHOULD BE 6.0 MM (0.24"). * IF THIS IS NOT THE CASE, ADJUST AS FOLLOWS.

  • Page 16: Needle Swing

    MS5027PR MECHANICAL ADJUSTMENT NEEDLE SWING TO CHECK: IF THE NEEDLE BAR MOVES SIDEWAYS WHILE THE NEEDLE IS IN THE FABRIC IN ZIGZAG STITCHING, ADJUST IT AS FOLLOWS: (THE NEEDLE SHOULD START SWINGING 2 (0.08") TO 3 MM (0.12") ABOVE THE NEEDLE PLATE.) ADJUSTMENT PROCEDURE: REMOVE THE TOP COVER (SEE PAGE 7), SET THE PATTERN SELECTOR DIAL AT "...

  • Page 17: Straight Stitching

    MS5027PR MECHANICAL ADJUSTMENT STRAIGHT STITCHING TO CHECK: SET THE STITCH WIDTH CONTROL AT "0", AND THE STITCH SELECTOR AT " ". TURN THE HANDWHEEL BY HAND. THE NEEDLE SHOULD NOT SWING SIDE TO THE SIDE AT THIS SETTING. SELECTED PATTERN...

  • Page 18: Straight Stitching

    MS5027PR MECHANICAL ADJUSTMENT STRAIGHT STITCHING ADJUSTMENT PROCEDURE: REMOVE THE TOP COVER (SEE PAGE 7). LOOSEN SETSCREW (A). MOVE THE ZIGZAG WIDTH ROD (B) UNTIL THE NEEDLE CEASES ITS ZIGZAG MOVEMENT WHEN YOU TURN THE HANDWHEEL TOWARD YOU. RETIGHTEN SETSCREW (A) SECURELY.

  • Page 19: Distribution Of Needle Swing

    MS5027PR MECHANICAL ADJUSTMENT DISTRIBUTION OF NEEDLE SWING TO CHECK: SET THE STITCH WIDTH CONTROL TO "0" AND THE STITCH SELECTOR AT " ". RAISE THE NEEDLE TO ITS HIGHEST POSITION. DROP THE FEED DOGS. PLACE A PIECE OF PAPER ON THE NEEDLE PLATE, AND LOWER THE PRESSER FOOT.

  • Page 20: Distribution Of Needle Swing

    MS5027PR MECHANICAL ADJUSTMENT DISTRIBUTION OF NEEDLE SWING ADJUSTMENT PROCEDURE: OPEN THE FACE COVER, AND LOOSEN THE HEXAGONAL SOCKET SCREW (D). MOVE THE NEEDLE BAR SUPPORTER (E) IN EITHER DIRECTION UNTIL THE DISTANCES A TO B, AND A TO C, BECOME EQUAL.

  • Page 21: Stretch Stitch Balance

    MS5027PR MECHANICAL ADJUSTMENT STRETCH STITCH BALANCE TO CHECK: SET THE STITCH SELECTOR AT " ", THE STITCH LENGTH CONTROL AT STRETCH STITCH, AND THE STRETCH STITCH ADJUSTER AT " ". PLACE A PIECE OF PAPER ON THE NEEDLE PLATE AND LOWER THE PRESSER FOOT.
  • Page 22 MS5027PR MECHANICAL ADJUSTMENT STRETCH STITCH BALANCE ADJUSTMENT PROCEDURE: REMOVE THE CAP (F). IF THE REVERSE STITCH LENGTH (B) IS SHORTER THAN THE FORWARD STITCH LENGTH (A), TURN THE ADJUSTING SETSCREW (E) IN THE DIRECTION OF (C). IF THE REVERSE STITCH LENGTH (B) IS LONGER THAN THE FORWARD STITCH LENGTH (A),...

  • Page 23: Feed Dog Height

    MS5027PR MECHANICAL ADJUSTMENT FEED DOG HEIGHT * THE HIGHEST POSITION OF THE FEED DOG SHOULD BE BETWEEN 0.75 TO 0.95 MM FROM THE SURFACE OF THE NEEDLE PLATE WHEN THE PRESSURE FOOT PRESSURE ADJUSTING LEVER IS SET AT "3" AND THE PRESSER FOOT IS LOWERED.

  • Page 24: Needle Bar Height

    MS5027PR MECHANICAL ADJUSTMENT NEEDLE BAR HEIGHT * THE DISTANCE BETWEEN THE UPPER EDGE OF NEEDLE EYE AND THE TIP OF THE HOOK SHOULD BE IN THE RANGE OF 1.6 - 2.0 MM WHEN THE TIP OF HOOK MEETS THE RIGHT SIDE OF THE NEEDLE IN ASCENDING TRAVEL OF NEEDLE FROM ITS LEFT AND LOWEST POSITION.

  • Page 25: Needle To Hook Timing

    MS5027PR MECHANICAL ADJUSTMENT NEEDLE TO HOOK TIMING * WHEN THE MACHINE IS SET THE STRAIGHT STITCH PATTERN " " (LEFT NEEDLE POSITION), THE AMOUNT OF ASCENDING TRAVEL OF THE NEEDLE BAR FROM ITS LOWEST POSITION TO THE POSITION WHERE THE TIP OF THE HOOK MEETS THE RIGHT SIDE OF THE NEEDLE SHOULD BE 3.25 - 3.55 MM.

  • Page 26: Needle Clearance To Hook

    MS5027PR MECHANICAL ADJUSTMENT NEEDLE CLEARANCE TO HOOK TO CHECK: SET THE STITCH SELECTOR AT " ". REPLACE THE NEEDLE WITH THE TEST PIN (A). TURN THE HANDWHEEL SLOWLY BY HAND UNTIL THE NEEDLE BAR REACHES ITS LOWEST POSITION. THE CLEARANCE BETWEEN THE TEST PIN (A) AND THE SHARP END (B) OF THE HOOK SHOULD BE BETWEEN +0.05 (0.002") AND –...

  • Page 27: Backlash (Lower Shaft Gear)

    MS5027PR MECHANICAL ADJUSTMENT BACKLASH ( LOWER SHAFT GEAR ) TO CHECK: REMOVE THE NEEDLE PLATE AND BOBBIN HOLDER. TURN THE HANDWHEEL SLOWLY TOWARD YOU UNTIL THE TIP OF THE HOOK (A) IS BETWEEN BOTH ENDS (B) OF THE FEED DOG.

  • Page 28: Buttonhole Stitch Balance

    MS5027PR MECHANICAL ADJUSTMENT BUTTONHOLE STITCH BALANCE TO CHECK: SET THE MACHINE AS FOLLOWS: STITCH SELECTOR: STITCH LENGTH CONTROL: BLUE ZONE STITCH WIDTH CONTROL: ATTACH THE AUTOMATIC BUTTONHOLE FOOT. SEW A BUTTONHOLE, AND CHECK THE STITCH BALANCE BETWEEN THE RIGHT AND LEFT SIDES OF THE BUTTONHOLE.

  • Page 29: Buttonhole Stitch Balance

    MS5027PR MECHANICAL ADJUSTMENT BUTTONHOLE STITCH BALANCE ADJUSTMENT PROCEDURE: REMOVE THE BED COVER. (SEE PAGE 8) LOOSEN HEXAGONAL SOCKET SCREW (A). IF THE RIGHT SIDE OF THE BUTTONHOLE IS TOO SPARSE, TURN THE RING (B) IN THE DIRECTION OF (C). IF THE LEFT SIDE OF THE BUTTONHOLE IS TOO SPARSE, TURN THE RING (B) IN THE DIRECTION OF (D).

  • Page 30: Needle Position

    MS5027PR MECHANICAL ADJUSTMENT NEEDLE POSITION TO CHECK: SET THE MACHINE AS FOLLOWS: STITCH SELECTOR: STITCH WIDTH CONTROL: TURN THE HANDWHEEL TOWARD YOU UNTIL THE NEEDLE COMES TO THE CENTER POSITION. THE NEEDLE SHOULD NOT MOVE WHEN YOU TURN THE STITCH WIDTH CONTROL TO "0".
  • Page 31 MS5027PR MECHANICAL ADJUSTMENT NEEDLE POSITION ADJUSTMENT PROCEDURE: REMOVE THE TOP COVER. (SEE PAGE 7) TURN THE HANDWHEEL TOWARD YOU UNTIL THE NEEDLE COMES TO THE CENTER OF THE SLIT IN THE NEEDLE PLATE. LOOSEN THE SETSCREWS (A) AND (B). TIGHTEN THE SETSCREW (A) SLIGHTLY.

  • Page 32: Zero Feeding

    MS5027PR MECHANICAL ADJUSTMENT ZERO FEEDING TO CHECK: SET THE STITCH SELECTOR TO " ", AND THE STITCH LENGTH CONTROL TO "0". PLACE A PIECE OF PAPER ON THE NEEDLE PLATE. CHECK IF THE PAPER MOVES FORWARD OR BACKWARD WHEN YOU TURN THE HANDWHEEL TOWARD YOU.
  • Page 33 MS5027PR MECHANICAL ADJUSTMENT ZERO FEEDING ADJUSTMENT PROCEDURE: REMOVE THE BELT COVER (SEE PAGE 9). SET THE STITCH SELECTOR AT " ", AND THE STITCH LENGTH CONTROL AT "0". PLACE A PIECE OF PAPER ON THE NEEDLE PLATE. IF THE PAPER MOVES FORWARD, TURN THE ADJUSTING SCREW (C) IN DIRECTION (A).

  • Page 34: Basic Needle Position

    MS5027PR MECHANICAL ADJUSTMENT BASIC NEEDLE POSITION * IF THE LEFT NEEDLE POSITION IN MAXIMUM ZIGZAG AND IN STRAIGHT SEWING ARE NOT THE SAME, ADJUST AS FOLLOWS: ADJUSTMENT PROCEDURE: REMOVE THE BELT COVER (SEE PAGE 9). SELECT THE LEFT NEEDLE POSITION IN MAXIMUM ZIGZAG, THEN SELECT THE LEFT NEEDLE POSITION IN STRAIGHT SEWING.

  • Page 35: Buttonhole Function (1)

    MS5027PR MECHANICAL ADJUSTMENT BUTTONHOLE FUNCTION (1) * A BUTTONHOLE THAT HAS BEEN SEWN WITH THE AUTOMATIC BUTTONHOLE FOOT WILL BE 3 MM (0.12") LONGER THAN THE ACTUAL BUTTON. THIS LENGTH CAN BE ADJUSTED AS FOLLOWS: ADJUSTMENT PROCEDURE: LOWER THE FEED DOG AND ATTACH THE BH FOOT "R", THEN LOWER THE PRESSER BAR.

  • Page 36: Buttonhole Function (2)

    MS5027PR MECHANICAL ADJUSTMENT BUTTONHOLE FUNCTION (2) * IF THE BAR TACK ON THE BUTTONHOLE OCCURS TOO EARLY, OR IF NO BAR TACK IS SEWN AT ALL, ADJUST AS FOLLOWS. ADJUSTMENT PROCEDURE: REMOVE THE BELT COVER (SEE PAGE 9). (A) IF THE BAR TACK IS SEWN TOO EARLY, TURN THE HEXAGONAL SOCKET SCREW (E) IN DIRECTION (C).

  • Page 37: Replacement And Adjustment Of Needle Threader Plate

    MS5027PR MECHANICAL ADJUSTMENT REPLACEMENT AND ADJUSTMENT OF NEEDLE THREADER PLATE * IF THE NEEDLE THREADER IS DAMAGED, REPLACE IT OR ADJUST AS FOLLOWS TO REPLACE THE NEEDLE THREADER COVER: PULL OUT THE THREADER COVER (DRAWING. 1). TO ATTACH THE THREADER COVER, MATCH THE GROOVE TO THE PIN (B) AND INSERT THE THREADER COVER (C).

  • Page 38: Motor Belt Tension

    MS5027PR MECHANICAL ADJUSTMENT MOTOR BELT TENSION TO CHECK: IF THE MOTOR BELT TENSION IS TOO TIGHT OR TOO LOOSE, IT MAY CAUSE THE BELT TO MAKE NOISE. A TOO TIGHT MOTOR BELT TENSION CAN CAUSE THE MACHINE TO RUN SLOWLY AND WILL OVERLOAD THE MOTOR;...

  • Page 39: Oiling

    MS5027PR OILING FACTORY LUBRICATED PARTS WILL PROVIDE YEARS OF HOUSEHOLD SEWING WITHOUT ROUTINE OILING, BUT YOU SHOULD STILL CHECK FOR POSSIBLE LUBRICATION NEEDS WHENEVER SERVICING THE MACHINES. OIL: USE GOOD QUALITY SEWING MACHINE OIL AT THE POINTS (A, B, C, D, E, F & G) INDICATED BY THE BLACK ARROWS.

  • Page 40: Wiring Of Terminal Block

    MS5027PR WIRING OF TERMINAL BLOCK L : LAMP M : MOTOR...

  • Page 41: Special Tools Required

    MS5027PR SPECIAL TOOLS REQUIRED SLOTTED SCREW DRIVER PHILLIPS SCREW DRIVER ALLEN SCREW DRIVER ALLEN WRENCH TEST PIN...

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