Kenmore 158.840 – 158.84 Sewing Machine Instruction Manual

Description

Kenmore 158.840 – 158.84 Sewing Machine Instruction Manual.

Includes:
Threading machine.
Winding the bobbin.
Changing the needle.
Adjusting tension.
Setting stitch length.
Needle and thread table.
Decorative stitching.
Blind stitching.
Sewing buttons.
Inserting the disk.
Overcast and applique.
Adjusting for good stitches.
Cleaning and oiling.
Replacing belt.
Common problem solving.

31 page instruction/owners manual.

Kenmore 158.840 – 158.84 Sewing Machine Instruction Manual.

 

 

ADJUSTING YOUR SEWING MACHINE FOR GOOD STITCHES

When your sewing machine does not sew a properly locked stitch, check the following:

1. Insert a new needle of the correct size for the thread and fabric you are
using. Consult the chart on page 5 for needle size.

2. The upper and bobbin thread should be matched in size and type.

3. Check threading carefully. See page 9.

4. Check the thread tension balance. Use mercerized thread, and a correct size
needle for the fabric you are using. Do not try this test with synthetic
thread as it will not break.

Begin with a full bobbin, properly threaded into the case. Set the stitch length
at about 12 stitches per inch. Fold a 611 square of your fabric in half
diagonally, forming a triangle. Make a line of stitching ½” from fold.

Check if:
a· Seam is puckered · both tensions are too tight.
b. Bottom thread lays on the fabric – tighten upper thread tension,
and repeat test. See page 12, Figure 3.
If the top thread lays on the fabric – loosen upper thread tension, and repeat test.
See page 12, Figure 2.
Grasp the stitching and pull with a snap to make threads break.
a. Both threads break – tensions are balanced.
b. Neither thread breaks – both tensions are too loose.
c. Upper thread breaks – loosen upper tension.
d. Lower thread breaks – tighten upper tension.
Both threads do not have to break at the same place, but they should break
on the same snap.

Bobbin tension may be reset by the following procedure:

Start with a loose bobbin thread tension.
Tighten the spring screw gradually until the bobbin case and full
bobbin can be gently lifted from your hand by the end of the bobbin thread.

 

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