Singer HEAVY DUTY 4423 User manual

For use with the SINGER® HEAVY DUTY 4423 Sewing Machine
SEWING MACHINE

Table of Contents
CAUTIONS 5
OVERVIEW 6
PARTS LIST 7
WINDING THE BOBBIN 8
INSERTING THE BOBBIN 10
THREADING THE UPPER THREAD 12
AUTOMATIC NEEDLE THREADER 14
RAISING THE BOBBIN THREAD 16
HOW TO CHOOSE YOUR PATTERN 17
THREAD TENSION 18
STITCH WIDTH DIAL & STITCH LENGTH DIAL 20
BEGINNING TO SEW 22
INSERTING & CHANGING NEEDLES 24
TROUBLESHOOTING 26

5
Cautions
To reduce the risk of burns, fire, electric, shock, or injury:
• Never operate this appliance if it has a damaged cord or plug, if
it is not working properly, if it has been dropped or damaged, or
dropped into water.
• Never operate the appliance with any air openings blocked.
Keep ventilation openings of the sewing machine and foot
controller free from accumulation of lint, dust, and loose cloth.
• Keep fingers away from all moving parts. Special care is
required around the sewing machine needle.
• Always use the proper needle plate. The wrong plate can cause
the needle to break.
• Do not use bent needles.
• Do not pull or push fabric while stitching. It may deflect the
needle causing it to break.
• Switch the sewing machine off when making any adjustments
in the needle area, such as threading needle, changing needle,
threading bobbin, or changing presser foot, and the like.
• To disconnect, turn all controls to the off position, then remove
plug from outlet.
• Do not unplug by pulling on cord. To unplug, grasp the plug, not
the cord.
• Never place anything on the foot controller.

6
The Singer Heavy Duty 4423 is a mechanical sewing machine with a
powerful motor and high sewing position, which along with its high
speed sewing capability makes it perfect for heavy-duty sewing tasks.
With adjustable presser foot pressure, you can sew heavy fabrics such
as canvas or denim as well as very lightweight sheers, and the stainless
steel bedplate allows fabrics to glide over the machine with ease. The
23 stitches include six basic stitches, four stretch stitches, 12 decorative
stitches, and one style of buttonhole.
You can also download the SINGER Sewing Assistant App on your
phone for additional instruction and tutorials.
While in operation, always keep your eyes on the sewing area.
Do not touch any moving parts, such as the thread take-up lever,
handwheel or needle.
Overview

7
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
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. Drop feed control
29. Foot speed control
30. Power cord
Parts List

8
• Place thread and corresponding spool holder on to spool pin. (1/2)
• Snap thread into thread guide. (3)
• Wind thread clockwise around bobbin winder tension discs. (4)
• Thread bobbin as illustrated and place on spindle. (5)
• Push bobbin spindle to right. (6)
• Hold thread end securely. (7)
• Step on foot control pedal. (8)
• Trim thread close to the bobbin & then continue winding until bobbin
is full. (9)
• Cut thread, push bobbin spindle to left (10) and remove.
Note: When the bobbin winder spindle is in “bobbin winding”position,
the machine will not sew and the hand wheel turn. To start sewing,
push the bobbin winder spindle to the left (sewing position).
Winding the Bobbin

9

10
Inserting the Bobbin
Turn power switch to off before inserting or removing the bobbin.
• Remove the bobbin cover plate by pushing the small tab to the right
of the cover towards the right.
• Insert the bobbin in the bobbin case with the thread running
counterclockwise direction (arrow).
• Pull the thread through the slit (A).
• Draw the thread clockwise until it slips into the notch (B), while
holding the bobbin down with the tip of your finger.
• Pull out about 15 cm (6 inches) of thread towards the back of the
plate and attach the bobbin cover plate. (C)