Janome 4052lx User manual

SERVICE MANUAL
4052LX

LOCATE AND IDENTIFYTHE PARTS ....................................................................................1
WHAT TO DO WHEN .......................................................................................................2 - 4
THREADING OF MACHINE...................................................................................................5
SERVICE ACCESS
FACE COVER ........................................................................................................................6
FREE ARM LEGS COVER.....................................................................................................6
FRONT COVER......................................................................................................................7
REAR PANEL .........................................................................................................................8
MECHANICAL ADJUSTMENT
TOP TENSION .......................................................................................................................9
PRESSER BAR HEIGHT AND ALLIGNMENT .....................................................................10
NEEDLE SWING ..................................................................................................................11
STRAIGHT STITCHING (1) .................................................................................................12
NEEDLE DROP (2) ..............................................................................................................13
STRETCH STITCH BALANCE ............................................................................................14
FEED DOG HEIGHT ............................................................................................................15
NEEDLE BAR HEIGHT ........................................................................................................16
NEEDLE TO SHUTTLE TIMING ..........................................................................................17
NEEDLE CLEARANCE TO SHUTTLE ................................................................................18
BACKLASH (BETWEEN LOWER SHAFT GEAR AND SHUTTLE HOOK GEAR) ..............19
NEEDLE POISITION MISALIGNMENT ...............................................................................20
ZERO FEEDING .................................................................................................................21
BUTTONHOLE STITCH BALANCE .....................................................................................22
ZERO FEEDING OF BUTTONHOLE BARTACK .................................................................23
BUTTONHOLE FUNCTION .................................................................................................24
REPLACEMENT AND ADJUSTMENT OF NEEDLE THREADER PLATE ..........................25
MOTOR BELT TENSION .....................................................................................................26
WIRING OF TERMINAL BLOCK .........................................................................................27
OILING .................................................................................................................................28
TABLE OF CONTENTS

1
LOCATE AND IDENTIFYTHE PARTS
Pattern indicating window
Stitch length dial
Stitch width dial
Spool holder (Large)
Spool pin
Thread tension dial
Bobbin winder thread guide
Thread take-up lever
Pressure adjusting
dial
Face cover
Thread cutter
Needle threader
Needle plate
Hook cover
Extension table
(Accessory box) Hook cover plate release
button
Reverse stitch button
Drop feed lever
Carrying handle
Bobbin winder spindle
Bobbin winder stopper
Handwheel
Pattern selector dial
Feed balancing dial
Power switch
Machine socket
Free arm
Buttonhole lever
Presser foot lifter
Additional spool pin hole

2
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 USE THE RECOMMENDED
INAPPROPRIATE FOR SEWING NEEDLE AND THREAD.
FABRIC BEING SEWN.
5. SEWING ON STRETCH USE A #11 BLUE TIP NEEDLE.
FABRIC
6. PRESSER FOOT PRESSURE ADJUST THE PRESSER BAR
IS TOO WEAK. LEVEL TO MAKE THE
PRESSURE STRONGER.
7. INAPPROPRIATE NEEDLE SEE MECHANICAL P.16
BAR HEIGHT ADJUSTMENT
“NEEDLE BAR HEIGHT”.
8. INAPPROPRIATE NEEDLE SEE MECHANICAL P.17
TO SHUTTLE TIMING ADJUSTMENT
“NEEDLE TO SHUTTLE TIMING”.
9. INAPPROPRIATE NEEDLE SEE MECHANICAL P.18
TO SHUTTLE CLEARANCE ADJUSTMENT “NEEDLE
CLEARANCE TO SHUTTLE.”
2. FABRIC NOT 1. PRESSER FOOT PRESSURE ADJUST THE PRESSER BAR
MOVING IS TOO WEAK. LEVEL TO MAKE THE
PRESSURE STRONGER.
2. INCORRECT F.D. HEIGHT SEE MECHANICAL P.15
ADJUSTMENT “FEED DOG
HEIGHT.”
3. F.D. IS IN DOWN POSITION. RAISE THE F.D. LEVEL.
4. THREAD ON BOTTOM SIDE MAKE SURE TO BRING
OF FABRIC IS JAMMED UP. BOTH NEEDLE AND BOBBIN
THREAD UNDER THE FOOT
WHEN STARTING SEWING.
5. FEED DOG TEETH ARE CHANGE THE FEED DOG.
WORN.

3
CONDITION CAUSE HOW TO FIX REFERENCE
3. BREAKING 1. INITIAL SEWING SPEED IS START WITH MEDIUM SPEED.
UPPER TOO FAST.
2. THREAD PATH IS USE THE PROPER THREAD
INCORRECT. PATH.
3. NEEDLE IS BENT OR DULL. REPLACEWITHANEWNEEDLE.
4. UPPER THREAD TENSION IS ADJUST UPPER THREAD
TOO STRONG. TENSION CORRECTLY.
5. NEEDLE SIZE IS USE APPROPRIATE NEEDLE
INAPPROPRIATE FOR FOR FABRIC AND THREAD
FABRIC. IN USE.
6. NEEDLE EYE IS WORN. CHANGE THE NEEDLE.
7. NEEDLE HOLE IN NEEDLE REPAIR THE HOLE OR
PLATE IS WORN OR BURRED. REPLACE THE NEEDLE PLATE.
4. BREAKING 1. INCORRECTLY THREADED
THREAD BOBBIN CORRECTLY.
BOBBIN BOBBIN.
2. TOO MUCH THREAD IS ADJUST THE POSITION OF
ON THE BOBBIN. STOPPER.
3. LINT IS STUCK INSIDE THE CLEAN THE SHUTTLE.
BOBBIN HOLDER.
4. THREAD QUALITY IS
CHANGE TO A HIGHER QUALITY
TOO LOW. SEWING THREAD.
5. THREAD IS JAMMING CLEAR OUT THE JAMMING
AROUND THE BOBBIN. THREAD.
5. NEEDLE 1. NEEDLE IS HITTING THE SEE MECHANICAL P.20
BREAKS NEEDLE PLATE. ADJUSTMENT “NEEDLE
POSITION.”
2. NEEDLE IS BENT OR WORN. CHANGE THE NEEDLE.
3. NEEDLE IS HITTING THE SEE MECHANICAL P.18
SHUTTLE. ADJUSTMENT “NEEDLE
CLEARANCE TO SHUTTLE.”
4. THE FABRIC MOVES WHILE SEE MECHANICAL P.11
THE NEEDLE IS PIERCING ADJUSTMENT “NEEDLE
IT, OR THE NEEDLE ZIGZAGS SWING.”
WHILE IN FABRIC.
5.
FABRIC IS BEING PULLED TOO GUIDE THE FABRIC GENTLY
STRONGLY WHILE SEWING. WHILE SEWING.
THREAD
THREAD

4
6. NOISY 1. BACKLASH BETWEEN SEE MECHANICAL P.19
OPERATION SHUTTLE HOOK GEAR AND ADJUSTMENT “BACKLASH
LOWER SHAFT GEAR IS TOO (LOWER SHAFT GEAR).”
GREAT.
2. LOWER SHAFT GEAR IS ELIMINATE THE LOOSENESS.
LOOSE.
3. INAPPROPRIATE BELT SEE MECHANICAL P.26
TENSION. ADJUSTMENT “MOTOR
BELT TENSION.”
4. NOT ENOUGH OIL OIL ALL MOVING PARTS.
5. UPPER SHAFT IS LOOSE. ELIMINATE THE LOOSENESS.
7. DEFORMATION 1. INAPPROPRIATE FEED SEE MECHANICAL P.14
PATTERN BALANCE. ADJUSTMENT “STRETCH
STITCH BALANCE.”
2. INAPPROPRIATE ZIGZAG SEE MECHANICAL P.11
SYNCHRONIZATION. ADJUSTMENT “NEEDLE
SWING.”
3. UPPER THREAD TENSION SEE MECHANICAL P. 9
IS TOO STRONG. ADJUSTMENT “TOP TENSION.”
8. IMPROPER 1. BUTTONHOLE STITCH SEE MECHANICAL P.22
BALANCE IS NOT CORRECT. ADJUSTMENT “BUTTONHOLE
STITCH BALANCE.”
2. CHANGING TO BAR TACK SEE MECHANICAL P.24
IS TOO EARLY OR WILL NOT ADJUSTMENT “BUTTONHOLE
WORK. FUNCTION .”
CONDITION CAUSE HOW TO FIX REFERENCE
BUTTONHOLE
RESULTS

5
THREADING OF MACHINE
THE STEP NUMBE CORRESPONDS WITH THE NUMBER IN THE ILLUSTRATIONS.
DOTTED LINES SHOWTHE PLACES WHERETHE THREAD LOOPS AND IS THEN PULLED
TIGHT.
RAISE THE TAKE-UP LEVER TO ITS HIGHEST POSITION BY TURNING THE HANDWHEEL
TOWARD YOU.
RAISE THE PRESSER FOOT LEVER.
PLACE THE SPOOL ON A PIN WITH THE THREAD COMING FROM THE BACK OF THE SPOOL.
1. DRAW THE THREAD THROUGH THE THREAD GUIDE.
2. HOLDING THE THREAD TAUT WITH YOUR RIGHT HAND, DRAW THE THREAD DOWN INTO
THE TENSION AREA AND THEN AROUND THE CHECK SPRING HOLDER.
3. FIRMLY DRAW THE THREAD UP AND THROUGH THE TAKE-UP LEVER FROM RIGHTTO LEFT.
4. PULL THETHREAD TO THE LEFT, AND SLIP IT INTOTHE NEEDLE BAR THREAD GUIDE.
5. THREAD THE NEEDLE FROM FRONTTO BACK.
NOTE: YOU MAY WANT TO CUT THE END OF THE THREAD WITH SHARP SCISSORS
FOR EASIER NEEDLE THREADING.
1
2
3
4
5

6
SERVICE ACESS (1)
TO REMOVE:
REMOVE THE SETSCREW (B) TO TAKE OUT THE FACE COVER (A).
TO ATTACH:
TO REPLACE, FOLLOW THE ABOVE PROCEDURE IN REVERSE.
FREE ARM LEGS COVER
TO REMOVE:
1. REMOVE THE SETSCREW (C).
2. REMOVE THE FREE ARM LEGS COVER (D).
TO ATTACH:
TO REPLACE, FOLLOW THE ABOVE PROCEDURE IN REVERSE.
SETSCREW (C)
FREE ARM LEGS COVER (D)
FACE COVER
FACE COVER (A)
SETSCREW (B)

7
TO REMOVE:
1. REMOVE THE FACE COVER AND FREE ARM LEGS COVER (SEE PAGE 6.)
2. REMOVE THE PATTERN SELECTOR DIAL (K), AND SETSCREWS (A) - (G)
3. LOOSEN SETSCREW (H).
4. DISENGAGE THE FRONT COVER HOOK (I), (J) AND THEN REMOVE THE FRONT COVER.
TO ATTACH:
TO REPLACE, FOLLOWTHIS PROCEDURE IN REVERSE.
PATTERN SELECTOR
DIAL (K)
(A)
(B)
(C)
(D)
(E)
(F)
(G)
(H)
(I)
(J)
SERVICE ACCESS (2)
FRONT COVER

8
TO REMOVE:
1. REMOVE THE FACE COVER AND FREE ARM LEGS COVER AND THE FRONT COVER (SEE PAGE 6
&7).
2. REMOVE THE SETSCREWS (A), (B), (C), (D) AND THE REAR COVER.
TO ATTACH:
TO REPLACE, FOLLOW THE ABOVE PROCEDURE IN REVERSE.
REAR PANEL
SERVICE ACCESS (3)
REAR PANEL
(A)
(B)
(B)
(C)
(D)

9
TOP TENSION
TO CHECK:
1.THE STANDARD UPPERTHREAD TENSION SHOULD BE 85 G WHEN PULLINGTHE THREAD (COTTON
THREAD #50) IN THE DIRECTION OF (C) WITH SETTING THE TENSION DIAL AT “4”. (MAKE SURE THE
FOOT SHOULD BE LOWERED.)
IF THE TENSION IS OUT OFTHE STANDARD RANGE, ADJUST IT AS FOLLOWS:
* PULLING SPEED FOR THE NEEDLE THREAD IS APPROXIMATELY 59 MM/ SECOND.
2. REMOVE THE FACE COVER, AND TURN THE ADJUSTING SCREW WITH THE SCREWDRIVER.
IF THE TOP TENSION IS TOO TIGHT, TURN THE ADJUSTING SCREW (D) IN DIRECTION “A”.
IF THE TOP TENSION IS TOO LOOSE, TURN THE ADJUSTING SCREW (D) IN DIRECTION “B”.
3. ATTACH THE FACE COVER.
(B)
(C)
(A)
ADJUSTING SCREW (D)
MECHANICAL ADJUSTMENT

10
A
C
B
A
TO CHECK:
1. RAISE THE PRESSER FOOT LEVER (B).
2.THE DISTANCE BETWEEN THE PRESSER FOOT (A) AND THE NEEDLE PLATE (C) SHOULD BE
6.0 MM (0.24”).
IF THIS IS NOTTHE CASE, ADJUST AS FOLLOWS.
ADJUSTMENT PROCEDURE:
1. REMOVE THE FACE COVER. RAISE THE PRESSER FOOT LEVER (B) AND LOOSEN THE
SETSCREW (D) ON THE PRESSER BAR HOLDER (E).
ADJUST THE DISTANCE BETWEEN THE PRESSER FOOT AND THE NEEDLE PLATE TO 6.0 MM
(0.24”).
2.TIGHTEN THE SETSCREW (D) SECURELY.
3. ATTACH THE FACE COVER.
PRESSER FOOT LEVER (B)
SETSCREW 4 X 8 (D)
SHOULD BE PARALLEL
FEED DOG SLITS (F)
NOTE:
WHEN YOU TIGHTEN THE SETSCREW, MAKE SURE THAT BOTH SIDES OF THE PRESSER FOOT ARE
PARALLEL TO THE FEED DOG SLOTS (F) ON THE NEEDLE PLATE.
<PRESSER FOOT ALIGNMENT>
FEED DOG
<HEIGHT OF PRESSER FOOT>
NEEDLE
PLATE (C)
PRESSER FOOT (A)
PRESSER BAR HOLDER (E)
6.0 mm
MECHANICAL ADJUSTMENT
PRESSER BAR HEIGHT AND ALLIGNMENT

11
2-3 mm
TO CHECK:
SET THE PATTERN SELECTOR DIAL AT “ “ AND MAXIMUM ZIGZAG WIDTH.
IF THE NEEDLE MOVES SIDEWISE WHILETHE NEEDLE IS COMING OUT FROMTHE FABRIC, ADJUST
IT AS FOLLOWS:
(THE NEEDLE SHOULD START SWINGING WHEN ITS TIP IS AT 2 MM (0.08”) TO 3 MM (0.12”) ABOVE
THE NEEDLE PLATE IN UPWARD MOTION).
ADJUSTMENT PROCEDURE:
1. REMOVE THE FACE COVER AND FRONT COVER (SEE PAGES 6 AND 7).
2. SELECT THE PATTERN SELECTOR DIAL AT “ “ AND SET THE ZIGZAG WIDTH AT “5”.
3. LOOSEN THE TWO HEXAGONAL SOCKET SCREWS ON THE UPPER SHAFT WORM.
4.WHILE HOLDING THE UPPER SHAFT WORM IN PLACE, CAREFULLY TURNTHE HANDWHEEL AND
ADJUST SO THAT LATERAL NEEDLE SWING STARTS FROM A POSITION 2 MM (0.08”) TO 3 MM
(0.12”) ABOVE THE NEEDLE PLATE IN RIGHT OUTFLOW MOTION.
5.TIGHTEN THE TWO HEXAGONAL SOCKET SCREWS ON THE UPPER SHAFT WORM.
6. ATTACH THE FRONT COVER AND FACE COVER.
NOTE: MAKE SURE THAT THERE IS NO BACKLASH BETWEEN THE UPPER SHAFT WORM AND
CAM BLOCK GEAR, ANDTHE UPPER SHAFT SHOULD TURN SMOOTHLY.
NEEDLE PLATE
GEAR
UPPER SHAFT WORM
THE BACKLASH IS
INCREASED. THE BACKLASH IS DECREASED.
IF THE UPPER SHAFT WORM DEVIATES LATERALLY
WHEN TURNING THE UPPER SHAFT, THE BACKLASH
BETWEEN THE GEARS WILL CHANGE.
MECHANICAL ADJUSTMENT
NEEDLE SWING
HEXAGONAL SOCKET
SCREWS
(RIGHT OUTFLOW MOTION)

12
STRAIGHT STITCHING (1)
SET THE PATTERN SELECTOR DIAL AT “ “,THE STANDARD NEEDLE DROP POSITION SHOULD BE
AT THE CENTER OF NEEDLE PLATE HOLE.
ADJUSTMENT PROCEDURE:
1. REMOVE THE FACE COVER (SEE PAGE 6).
2. SET THE PATTERN SELECTOR DIAL AT “ “ AND ZIGZAG WIDTH DIAL AT “ 0 “, THEN CHECK THE
NEEDLE DROP POSITION.
3. IF THE NEEDLE DROP POSITION IS NOT THE CENTER OF THE NEEDLE PLATE HOLE, REMOVE
THE FACE COVER AND LOOSEN THE SETSCREW (C) AND ADJUST THE NEEDLE DROP POSITION
BY TURNING THE ECCENTRIC PIN.
NOTE:WHEN ADJUSTINGTHE NEEDLE DROP POSITION, MAKE SURETHE ECCENTRIC PIN SHOULD
SIT WITH ITS HEAD OFF-CENTERED DOWNWARD.
4. AFTER THE ADJUSTMENT OF NEEDLE DROP POSITION, TIGHTEN SETSCREW (C) AND ATTACH
THE FACE COVER.
MECHANICAL ADJUSTMENT
SETSCREW 3 X 4 (C) ECCENTRIC PIN (D)
NEEDLE PLATE HOLE
A = B
ADJUST THE NEEDLE
DROP POSITION BY
TURNING THE ECCENTRIC
PIN AS SHOWN.
ECCENTRIC PIN
POSITION

13
TO CHECK:
WHENTHE NEEDLE SWINGS IN MAXIMUM ZIGZAG WIDTH “ “,THE DISTANCE BETWEEN BOTH ENDS
OF THE NEEDLE HOLE ON THE NEEDLE PLATE AND THE NEEDLE SHOULD BE 0.2 MM OR MORE.
IF NOT, ADJUST AS FOLLOWS:
ADJUSTMENT PROCEDURE:
1. REMOVE THE FACE COVER, FREE ARM LEGS COVER AND FRONT COVER. (SEE PAGE 6 AND 7).
2. SET THE PATTERN SELECTOR DIAL AT “ “ AND THE ZIGZAG WIDTH DIAL AT “ 5 ”, AND CHECK
BOTH NEEDLE DROP POSITIONS WITH THE MAXIMUM ZIGZAG WIDTH.
3. IF THE BOTH NEEDLE DROP POSITIONS ARE NOT EQUAL, LOOSENTHE SETSCREW (A) AND TURN
THE NUT TO ADJUST THE NEEDLE DROP POSITION.
4.TIGHTEN THE SETSCREW (A) AND ATTACH THE FRONT COVER, FREE ARM LEGS COVER AND
FACE COVER.
NEEDLE DROP (2) MECHANICAL ADJUSTMENT
NEEDLE PLATE HOLE
0.2 MM0.2 MM NUT (B) SETSCREW (A)

14
ADJUSTMENT PROCESURE:
1. SET THE PATTERN SELECTOR DIAL AT “ “, ZIGZAG WIDTH DIAL AT “0“, AND STITCH LENGTH
DIAL AT “S1”.
2. SET THE FEED ADJUSTING KNOB AT “ “.
3. PLACE A PIECE OF PAPER ON THE NEEDLE PLATE.
4. LOWER THE PRESSER FOOT AND TURN THE HANDWHEEL TOWARDYOU TO CHECK THE
FORWARD AND BACKWARD NEEDLE DROP POSITIONS.
5. REMOVE THE CAP AS SHOWN BELOW.
IF THE REVERSE STITCH LENGTH (B) IS SHORTER THAN THE FORWARD STITCH LENGTH (A),
TURN THE ADJUSTING SETSCREW INTHE DIRECTION OF (C).IF THE REVERSE STITCH LENGTH
(B) IS LONGER THAN THE FORWAERD STITCH LENGTH (A), TURN THE ADJUSTING SETSCREW
IN THE DIRECTION OF (D).
MECHANICAL ADJUSTMENT
CAP
ADJUSTING SCREW
STRETCH STITCH BALANCE

15
Mechanical Adjustment
Feed Dog Height
The height of the deed dog should be 0.8-0.9 mm above the needle plate.
Adjustment procedure:
1. Select the straight stitch “ “ and set the stitch width control at “0”.
2. Set the foot pressure dial at “3” and lower the foot.
3. Loosen the setscrew (A)
4. Turn the handwheel to bring the feed dog to its highest position.
5. If the feed dog height is lower than 0.8 mm: Turn the adjusting screw (B) in the direction of (C).
6. If the feed dog height is higher than 0.9 mm: Turn the adjusting screw (B) in the direction of (D).
7. Tighten the setscrew (A).
Presser foot
Feed dog Upper surface of
needle plate
0.8-0.9 mm
Setscrew (A)
Adjustin screw (B)
(D)
(C)

16
Mechanical Adjustment
Needle Bar Height
When the tip of the hook meets the left side of the needle in ascending travel of the needle from its left and
lowest position, the distance between the top of the needle eye and the tip of the hook should be in the range
of 1.6-2.0 mm.
Adjustment procedure:
1. Select the straight stitch “ “ and set the stitch width control at “6.5”.
2. Remove the needle plate (A) and bobbin holder (B).
3. Turn the handwheel until the tip of the hook meets with the right side of the needle.
4. Remove the face cover and loosen the setscrew (C).
5. Adjust the needle bar height by moving the needle bar up or down.
6. Tighten the setscrew (C).
Note: Be sure that the groove on the needle bar is facing right in the front.
7. Attach the face cover, bobbin case and needle plate.
Setscrews
Needle plate
Hook
Bobbin holder (B)
Setscrew (C)
Groove
#14 Needle
Hook race
Upper edge of
needle eye
1.6-2.0 mm
Hook point meets right
side of needle.

17
When the hook point meets with the right side of the needle, the height of needle point from its lowest and
left most position should be 3.25-3.55 mm.
Adjustment procedure:
1. Select the straight stitch “ “ and set the stitch width control at “6.5”.
2. Remove the presser foot, needle plate (A) and bobbin holder (B).
3. Remove the front cover (See page 8.).
4. Turn the handwheel to bring the needle to its lowest position.
5. Loosen the 2 setscrews (C) in the lower shaft gear.
6. Turn the handwheel to raise the needle bar 3.4 mm from the lowest position.
7. Rotate the lower shaft gear until the hook point meets the right side of the needle, while holding the
handwheel in place.
8. Tighten the setscrews (C).
9. Attach the front cover.
10.Attach the bobbin holder, needle plate and presser foot.
Mechanical Adjustment
Needle Timing to Hook
Setscrews
Needle plate (A)
Hook
Bobbin holder (B)
Lower shaft gear
Setscrews (C)
3.25-3.55 mm
Hook point meets
right side of needle.

18
THE CLEARANCE BETWEENTHETEST PIN ANDTHETIP OFTHE SHUTTLE HOOK SHOULD BE BETWEEN
-0.10 MM TO +0.05 MM.
TO CHECK:
1. SET THE PATTERN SELECTOR DIAL AT “ “, ZIGZAG WIDTH DIAL AT “ 0 “.
2. REMOVE THE NEEDLE PLATE (A), AND BOBBIN HOLDER (B).
3.ATTACHTHETEST PIN (D) AND PUSH IT UP UNTIL IT STOPS ANDTHENTIGHTENTHE NEEDLE CLAMP
SCREW (E).
4. REMOVE THE FACE COVER (SEE PAGE 6).
5.TURN THE HANDWHEEL TOWARD YOU SLOWLY BY HAND UNTIL TIP OF THE TEST PIN MEETS JUST
IN FRONT OFTHETIP OFTHE SHUTTLE HOOK, LOOSENTHE SETSCREW (C) AND MOVETHE NEEDLE
BAR SUPPORTER BACK OR FORTH AS SHOWN BYTHE ARROWTO ADJUSTTHE CLEARANCE WITHIN
A RANGE OF -0.10 TO +0.05 MM.
6.TIGHTEN THE SETSCREW (C).
7.SET THE ZIGZAG WIDTH DIAL AT “5”,TURN THE HANDWHEELTOWARDYOU TO CHECK THE NEEDLE
CLEARANCE AT BOTH LEFT AND RIGHT NEEDLE DROP POSITION.
8. ATTACH THE FACE COVER.
9. ATTACH THE BOBBIN HOLDER (B), NEEDLE PLATE (A) AND NEEDLE.
MECHANICAL ADJUSTMENT
NEEDLE CLEARANCETO SHUTTLE
NEEDLE PLATE
SETSCREWS
NEEDLE
PLATE (A)
BOBBIN HOLDER (B)
SETSCREW (C)
NEEDLE BAR
SUPPORTER (F)
TEST PIN (D)
NEEDLE CLAMP SCREW (E)
-0.10 TO +0.05 MM
SHARP END OF
SHUTTLE HOOK
HOOK