Singer 4411, 4423, 4443, 4452, 5511 Service Manual
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Service Manual
4411-4423-4432-4443-4452
5511-5523-5532-5554
44S-85SCH
104 73 14-26
2014-02-24
1. Names of principal parts ............................................................................................................
2
2. Removing methods of external parts
2-1 Sewing table ..........................................................................................................................3
2-2 Face plate ...............................................................................................................................3
2-3 Base cover .............................................................................................................................3
2-4 Free arm base ........................................................................................................................3
2-5 Free arm slab .........................................................................................................................4
2-6 Arm top cover ........................................................................................................................4
2-7 Back cover .............................................................................................................................5
2-8 Front cover.............................................................................................................................6
3. Adjusting methods of each part
3-1 Play of arm shaft ...................................................................................................................7
3-2 Noisy - take up lever adjustment .........................................................................................8
3-3 Needle drop position adjustment ........................................................................................8
3-4 Height of presser foot ........................................................................................................... 9
3-5Needleowatmaximumzigzagwidth .............................................................................. 10
3-6 Needle center position adjustment....................................................................................11
3-7Needlepositiononzigzag ..................................................................................................12
3-8 Automatic needle threader adjustment ............................................................................13
3-9 Adjustment of feed rock shaft and feed lifting rock cam ................................................14
3-10 Height of needle bar .........................................................................................................15
3-11 Timing of needle and hook ..............................................................................................16
3-12 Distance-needle-hook ......................................................................................................17
3-13 Play between shuttle driver shaft gear and lower shaft gear .......................................18
3-14 Play of shuttle driver shaft ...............................................................................................19
3-15 Feed-dog height ................................................................................................................20
3-16 Position of feed-dog in relation to the needle plate (left to right) ................................21
3-17 Upper thread tension adjustment ...................................................................................22
3-18 Shuttle hook tension adjustment ....................................................................................23
3-19 Motor belt tension .............................................................................................................24
3-20 Drop point of needle .........................................................................................................25
3-21 Forward and reverse stitching in buttonhole sewing
(feeding pitch of reverse and forward stitching is not even) .......................................26
3-22 Buttonhole upper and lower stitching problem .............................................................27
3-23 Bobbin winding problem ..................................................................................................28
ATTENTION
Be sure to observe the following, as they may well become causes for re, electric-shock, inju-
ries, and damage to parts.
- Be sure to unplug power source before engaged in disassembly, installation, adjustment.
- In case of installing please pay special care to clamp electrical cords, etc., scars to sheath,
mis-circuit, etc.
- Be sure to use regular standard part in replacing.
CONTENTS
1. Names of principal parts
14
15
1
2
3
5
6
8
7
13
11
12
10
4
9
29
30
25
26
28
23
24
27
20
21
22
16
17
19
18
16. Horizontal spool pin
17. Bobbin winding spindle
18. Hole for second spool pin
19. Handwheel
20. Buttonhole stitch balance adjustment slot
21. Power and light switch
22. Main plug socket
23. Bobbin thread guide
24. Upper thread guide
25. Face plate
26. Handle
27. Presser foot lifter
28.
29. Foot speed control
30. Power cord
Drop feed control
1. Thread tension dial
2. Presser foot pressure adjustment
3. Thread take-up lever
4. Reverse sewing lever
5. Thread cutter
6. Presser foot
7. Needle plate cover
8. Removable extension table/ accessory storage
9. Three needle position dial
10. Bobbin stopper
11. Stitch width dial
12. Stitch length dial
13. Pattern selector dial
14. Automatic threader
15. One step buttonhole lever
(not on all model)
(not on all model)
2. Removing methods of external parts
2-1 Sewing table
Keep the snap-in sewing table horizontal, and
pull it in the direction of the arrow. (1)
2-2 Face plate
- Remove the operation cover (a).
- Loosen the screw (b) and remove the face
plate. (2)
2-3 Base cover
- Lay down machine.
- Remove the screws (c, d, e, f, g, h). (3)
- Remove the base cover.
2-4 Free arm base
Remove the screws (i, j) and remove the free
arm base. (4)
Free arm base
Base cover
2-5 Free arm slab
- Remove the screw (k). (5)
- Remove the
free arm slab. (6)
2-6 Arm top cover
Remove the screws (l, m) and remove the arm
top cover. (7)
Free arm slab
2-7 Back cover
- Remove the screws (n, o). (9)
- Remove the screw (p). (10)
- Remove the screw (q). (11)
- Remove the back cover. (12)
2-8 Front cover
- Remove the screw (r) which deeply inside
the machine. (13)
- Loosen the screw (s) about 3mm. (14)
- Remove the pattern select dial (t, u) and
remove front cover following direction of
arrow. (15)
u
3. Adjusting methods of each part
3-1 Play of arm shaft
- Remove the face plate, arm top cover.
- Loosen the screws (a, b) of arm shaft collar
(d). (1)
- Pull the hand wheel to the right. (2)
- Push the arm shaft collar (d) to right tightly
against arm shaft bushing (c), and then
fasten and secure the screws (a, b). (1)
- Be sure proper distance between arm shaft
collar and arm shaft bushing. (1)
- Be sure arm shaft operates smoothly after
adjustment.
- Arm shaft collar and arm shaft bushing being
too tightly closed might cause insufcient
operation of arm shaft.
3-3 Needle drop position adjustment
- Remove the face plate.
- Set the pattern selector dial to " " or " ".
Turn the stitch width dial to "0".
- Lo o s e n the sc r e w (a ) of ne e d le ba r
supporter. (1)
- Turn needle bar supporter (b) forward /
backward to adjust needle. (1)
Backward (↑) to move needle forward
Forward (↓) to move needle backward
- Set needle position above center of needle
plate and fasten the screw (a). (1)
* The space between needle and the tip of
the shuttle hook holder should be 0.05~0.10
mm.
3-2 Noisy - take up lever adjustment
- Remove the face plate and front cover.
- Turn around hand wheel, check noisy and
movement.
- Remove the screw (a), push take up lever
support (b) right to proper location, tight the
screw (a). (1)
- If adjustment is too tight, it will be difcult to
move during turn around hand wheel.
- If adjustment is too loose, it will be made
noisy during turn around hand wheel.
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