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CONDITION

CAUSE

HOW TO FIX

REFERENCE

6. NOISY

1. BACKLASH BETWEEN SEE MECHANICAL

P.16

OPERATION SHUTTLE HOOK GEAR AND ADJUSTMENT “CLEARANCE

LOWER SHAFT GEAR IS TOO BETWEEN NEEDLE AND

GREAT.

SHUTTLE (NO.2)”.

2. LOWER SHAFT GEAR IS ELIMINATE THE LOOSENESS.

LOOSE.

3. INAPPROPRIATE BELT

SEE MECHANICAL

P.24

TENSION.

ADJUSTMENT “MOTOR BELT

TENSION”.

4. UPPER SHAFT GEAR IS LOOSE. ELIMINATE THE LOOSENESS.

5. NOT ENOUGH OIL.

OIL ALL MOVING PARTS.

7. DEFORMATION 1. INAPPROPRIATE ZIGZAG SEE MECHANICAL

P.13

PATTERN

SYNCHRONIZATION.

ADJUSTMENT “NEEDLE

SWING”.

2. INAPPROPRIATE

SEE MECHANICAL

P.23

DISENGAGEMENT OF CAM ADJUSTMENT

FOLLOWER.

“DISENGAGEMENT OF CAM

FOLLOWER".

3. UPPER THREAD TENSION ADJUST UPPER THREAD

P.10

IS TOO STRONG.

TENSION CORRECTLY.

WHAT TO DO WHEN

Содержание NH15

Страница 1: ...1 SERVICE MANUAL MODEL NH15 PARTS LIST...

Страница 2: ...DLE THREAD TENSION 10 BOBBIN TENSION 11 PRESSER BAR HEIGHT AND ALIGNMENT 12 NEEDLE SWING 13 NEEDLE DROP POSITION 14 CLEARANCE BETWEEN NEEDLE AND SHUTTLE 15 16 FEED DOG HEIGHT 17 NEEDLE BAR HEIGHT 18 N...

Страница 3: ...ATE NEEDLE SEE MECHANICAL P 18 BAR HEIGHT ADJUSTMENT NEEDLE BAR HEIGHT 7 INAPPROPRIATE NEEDLE SEE MECHANICAL P 19 TO HOOK TIMING ADJUSTMENT NEEDLE TIMING TO SHUTTLE 8 INAPPROPRIATE NEEDLE SEE MECHANIC...

Страница 4: ...O MUCH THREAD IS ADJUST THE POSITION OF WOUND ON THE BOBBIN STOPPER 3 LINT IS STUCK INSIDE THE CLEAN THE HOOK RACE HOOK RACE 4 THREAD QUALITY IS CHANGE TO A HIGH QUALITY TOO LOW SEWING THREAD 5 THREAD...

Страница 5: ...ATE BELT SEE MECHANICAL P 24 TENSION ADJUSTMENT MOTOR BELT TENSION 4 UPPER SHAFT GEAR IS LOOSE ELIMINATE THE LOOSENESS 5 NOT ENOUGH OIL OIL ALL MOVING PARTS 7 DEFORMATION 1 INAPPROPRIATE ZIGZAG SEE ME...

Страница 6: ...SETSCREW B TO ATTACH 2 FOLLOW THE ABOVE PROCEDURE IN REVERSE TOP COVER TO REMOVE 1 REMOVE THE SETSCREWS C 2 SLIDE THE CORNER OF THE TOP COVER SLIGHTLY IN THE DIRECTION OF ARROW BE CAREFUL THAT THE TH...

Страница 7: ...7 A BASE COVER SERVICE ACCESS BASE COVER TO REMOVE 1 LOOSEN THE SETSCREWS A 2 REMOVE THE BASE PLATE TO ATTACH 3 MOUNT THE BASE PLATE AND SECURE IT WITH SETSCREWS...

Страница 8: ...REW A SEE PAGE 4 2 OPEN THE SHUTTLE COVER AND REMOVE THE SETSCREWS B C AND D 3 REMOVE THE CAPS AND SETSCREWS E F G 4 REMOVE THE SETSCREWS H AND I 5 OPEN THE TOP COVER SEE PAGE 5 LOOSEN THE SETSCREW J...

Страница 9: ...5 2 LOOSEN THE SETSCREW A 3 REMOVE THE SETSCREW B REMOVE THE REAR COVER SEE PAGE 6 LOOSEN THE SETSCREW C E AND H REMOVE THE SETSCREW D 4 OPEN THE SHUTTLE COVER REMOVE THE SETSCREW F 5 REMOVE THE BASE...

Страница 10: ...ABOVE LIMIT ADJUST AS FOLLOWS 1 SET THE TENSION DIAL 3 2 REMOVE THE COVER 3 LOWER THE PRESSER FOOT IF THE TOP TENSION IS TOO LOOSE TURN THE LEAD SCREW IN THE DIRECTION A IF THE TOP TENSION IS TOO TIG...

Страница 11: ...RING THE BOBBIN THREAD TENSION SHOULD BE 45 55g WHEN PULLING THE THREAD IN THE DIRECTION OF B IF THE TENSION IS OUT OF THE RANGE ADJUST IT AS FOLLOWS ADJUSTMENT PROCEDURE 1 TURN THE ADJUSTING SCREW C...

Страница 12: ...E COVER SEE PAGE 6 2 REMOVE THE SETSCREWS B AND THE LAMP SOCKET THEN LOOSEN THE SCREW C ON THE PRESSER BAR HOLDER ADJUST THE DISTANCE BETWEEN THE PRESSER FOOT D AND THE NEEDLE PLATE D TO 6 0 MM 0 24 3...

Страница 13: ...PATTERN SELECTOR DIAL WITH MAXIMUM ZIGZAG WIDTH AND REMOVE THE T TOP COVER SEE PAGE 6 2 LOOSEN TWO SETSCREWS 3 ADJUST THE NEEDLE SWING BY TURNING THE HANDWHEEL WHILE HOLDING THE WORM SO AS NOT TO ROT...

Страница 14: ...of the needle hole on the needle plate and the needle drop positions should be equal If not adjust as follows Adjustment procedure 1 Remove the face cover See page 6 2 Set the pattern selector dial at...

Страница 15: ...RANCE BETWEEN 0 05 TO 0 10 MM IF CLEARANCE IS TOO WIDE MOVE THE NEEDLE BAR SUPPORTER IN THE DIRECTION B IF CLEARANCE IS TOO NARROW MOVE THE NEEDLE BAR SUPPORTER IN THE DIRECTION C NOTE AFTER THIS ADJU...

Страница 16: ...LEARANCE BETWEEN THE NEEDLE AND THE SHUTTLE RACE IN THE RANGE OF 0 05 TO 0 10 MM 5 SET THE PATTERN SELECTOR DIAL AT TURN THE HANDWHEEL TO CHECK IF THE CLEARANCE BETWEEN THE NEEDLE AND INNER EDGES OF T...

Страница 17: ...EEDLE PLATE SHOULD BE 0 75 0 90 MM IF IT IS NOT IN THE RANGE ADJUST AS FOLLOWS ADJUSTMENT PROCEDURE 1 OPEN THE SHUTTLE COVER 2 LOWER THE PRESSER FOOT AND TURN THE HANDWHEEL TOWARD YOU UNTIL THE FEED D...

Страница 18: ...tment procedure 1 Remove the face cover 2 Set the pattern selector dial at 3 Open the shuttle cover 4 Remove the shuttle race ring 5 Turn the handwheel toward you until the tip of the shuttle hook mee...

Страница 19: ...RING 5 TURN THE HANDWHEEL TOWARD YOU UNTIL THE TIP OF THE SHUTTLE HOOK MEETS THE LEFT SIDE OF THE NEEDLE 6 LOOSEN THE LOWER SHAFT CRANK ARM SCREWS A 7 WHILE HOLDING THE SHUTTLE HOOK SO IT DOESN T TURN...

Страница 20: ...RANGE OF 9 12 STITCHES IN THE RIGHT SIDE ROW BACKWARD FEEDING AGAINST 10 STITCHES IN THE LEFT SIDE ROW FORWARD FEEDING IS CONSIDERED ACCEPTABLE ADJUSTMENT PROCEDURE 1 CHECK THE FEED BALANCE BY SEWING...

Страница 21: ...or dial and set it at pattern 5th cam as viewed from C 3 Turn the handwheel to put the cam follower onto the top convex of the zigzag cam 4 Loosen the setscrew 5 Push the convex part of the cam follow...

Страница 22: ...ELT JUMPING 2 THE BELT DEFLECTION SHOULD BE 7 MM 9 MM WHEN PRESSING THE MIDDLE OF THE MOTOR BELT WITH APPROXIMATELY 300 GRAMS OF PRESSURE ADJUSTMENT PROCEDURE 1 REMOVE THE FRONT AND REAR COVER SEE PAG...

Страница 23: ...23 WIRING 1 WIRING FOR MACHINE SOCKET UNIT L M M MOTOR L LAMP M L 120V 240V...

Страница 24: ...24 MODEL NH15 PARTS LIST 1 2 33 35 3 6 25 44 7 45 46 47 48 49 13 14 29 31 32 26 4 24 19 4 37 38 7 12 40 41 40 42 43 20 18 34 27 30 16 15 12 12 28 10 7 8 5 11 22 21 6 6 6 28 36 23 9 39 17...

Страница 25: ...6 310616706 310056001 310057703 310050005 735616200 735002001 000097901 000061319 739064003 Rear cover unit Rear cover Cover fixing plate Tapping screw 3x8 B Setscrew Setscrew TP4x6 Setscrew 4x8 Setsc...

Страница 26: ...26 MODEL NH15 PARTS LIST 1 2 3 4 5 6 7 8 9 10 19 18 17 20 11 12 13 14 16 16 21 23 22 24 25 26 28 29 30 27 15...

Страница 27: ...Presser bar base plate Needle position set plate Setscrew 4x6 Washer Bolt 4x8 Presser bar Presser bar spring Presser bar bracket Hexagonal socket screw 4x8 Presser foot lifter Snap ring E 5 Tension re...

Страница 28: ...28 MODEL NH15 PARTS LIST 1 2 3 4 4 5 6 7 8 9 10 11 12 13 13 14 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 34...

Страница 29: ...k pin Threader plate unit Needle bar unit Needle bar connecting stud unit Threader set plate unit Threader set plate Threader base plate Setscrew 2x4 Thread take up lever unit Thread take up lever pin...

Страница 30: ...30 MODEL NH15 PARTS LIST 1 2 9 3 4 5 6 7 6 10 11 12 13 14 15 16 17 22 19 25 22 27 28 29 30 24 23 8 18 26 20 21...

Страница 31: ...743030003 000121400 Upper shaft unit Setscrew Thrust washer Upper shaft front bushing Ring Hexagonal socket screw 5x5 Worm Hexagonal socket screw 4x4 Setscrew Felt Crank rod unit Feed cam Crank rod Cr...

Страница 32: ...32 MODEL NH15 PARTS LIST 9 10 11 12 6 6 13 8 8 28 23 24 25 26 20 20 19 21 18 17 16 27 23 22 4 5 1 3 2 7 6 8 14 23 15...

Страница 33: ...plate unit Bobbin winder support plate Bobbin winder arm unit Clutch opener plate Setscrew 3x8 B Snap ring E 5 Bobbin winder arm spring Setscrew 4x8 Zigzag mechanism unit Index spring Setscrew 3x5 Pat...

Страница 34: ...34 MODEL NH15 PARTS LIST 1 2 3 4 4 5 6 7 8 9 10 11 12 13 14 8 4 15 16 17 8 8 18 19...

Страница 35: ...00001609 000172602 735610101 532096007 647515006 102261000 Needle plate Setscrew Lower shaft gear unit Hexagonal socket screw 5x5WP Washer 8 0 5 Bushing Feed lifting cam Hexagonal socket screw 5x5 Low...

Страница 36: ...36 MODEL NH15 PARTS LIST 1 2 3 4 5 6 7 8 6 9 10 10 11 11 12 12 22 23 24 25 26 27 6 13 14 15 16 6 17 18 19 20 21...

Страница 37: ...shaft unit Feed rock shaft Feed bar Feed bar shaft Snap ring E 4 Hexagonal socket screw 4x4 Feed dog Setscrew Feed bar spring Feed rock shaft center Feed rock shaft center plate Setscrew 4x6 Feed lift...

Страница 38: ...38 MODEL NH15 PARTS LIST 1 2 3 9 5 8 6 7 4...

Страница 39: ...T MODEL NH15 743612005 014170108 000115504 739505403 000060802 739037007 000107802 000103509 650166008 Motor unit Motor Setscrew TP5x10 Machine socket unit Nut Machine socket cover Setscrew 3x10 B Set...

Страница 40: ...40 MODEL NH15 PARTS LIST 2 8 1 4 5 7 6 3 9 10 11...

Страница 41: ...310870009 647803004 102261000 647808009 639804000 735801008 611413002 611406002 611411000 C 1028 310800260 Accessory set Screwdriver small Bobbin Seam ripper unit Needle set unit Darning plate Buttonh...

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