TROUBLE SHOOTING GUIDE

Problem

Cause

 

Correction

 

 

Reference

 

 

 

 

 

 

 

1.The needle thread tension is too tight.

1.Loosen the thread tension.

 

 

Page 19

 

 

 

 

 

 

 

2.The needle thread is not threaded

2.Rethread the machine.

 

 

Page 13

Seam

correctly.

 

 

 

 

 

 

 

puckering

3.The needle is too heavy for the fabric

3.Choose a needle to suit the thread and

Page 22

 

being sewn.

fabric.

 

 

 

 

 

 

4.Stitch length is too long for the fabric.

4.Shorten stitch length

 

 

Page 28

 

 

 

 

 

 

 

1.The correct presser foot is not used.

1.Select the correct foot.

 

 

Page 77

Patterns are

 

 

 

 

 

2.The needle thread tension is too tight.

2.Loosen the thread tension.

 

 

Page 19

distorted

 

 

 

 

 

 

 

 

3.The stitch length is not suitable for the

3.Make a stitch adjustment and add

Page 28

 

 

fabric being sewn.

stabilizer to the fabric.

 

 

 

 

 

 

 

 

The machine

1.Thread is caught in the hook.

Remove the upper thread and bobbin

Page 73

 

case. Turn the handwheel backwards and

 

 

2.The feed dogs are packed with lint.

 

 

jams

forwards by hand and remove the thread

 

 

 

 

 

 

 

remnants.

 

 

 

 

 

 

1.Lint or oil have collected on the hook or

1.Clean the hook and feed dog as

Page 73

 

needle bar.

described.

 

 

 

 

 

 

2.The needle is damaged.

2.Replace the needle.

 

 

 

Page 23

The machine

 

 

 

 

 

 

 

3.Slight humming sound coming from

3.Normal.

 

 

 

--

 

is noisy

internal motor.

 

 

 

 

 

 

 

 

 

 

 

 

4.Thread is caught in the hook.

Remove the upper thread and bobbin

Page 73

 

 

case. Turn the handwheel backwards and

 

 

 

5.The feed dogs are packed with lint.

 

 

 

forwards by hand and remove the thread

 

 

 

 

 

 

 

 

remnants.

 

 

 

 

 

 

 

 

 

 

 

 

1.Poor quality thread.

1.Select a better quality thread.

 

 

Page 22

Uneven

 

 

 

2.The bobbin case is threaded wrong.

2.Remove the bobbin case, the thread

Page 12

stitches,

 

and reinsert correctly.

 

 

 

 

uneven feed

 

 

 

 

 

 

 

 

3.Fabric has been pulled.

3.Do not pull on the fabric while sewing,

--

 

 

 

 

 

let it be taken up by the machine.

 

 

 

 

 

 

 

 

 

 

 

1.The machine is not turned on.

1.Turn on the machine.

 

 

Page

9

 

 

 

 

 

 

 

2.The Start/stop button was not pressed.

2.Press the Start/stop button.

 

 

Page 24

 

 

 

 

 

 

 

3.The presser foot lever is raised.

3.Lower the presser foot lever.

 

 

Page 17

 

 

 

 

 

 

The sewing

4.The Start/stop button was pressed, even

4.Do

not use Start/stop button when

the

Page 24

though the foot controller is connected.

foot

controller is

connected.

To

use

 

 

machine

 

 

 

Start/stop button,

disconnect

the

foot

 

 

doesn't

 

 

 

 

controller.

 

 

 

 

 

operate

 

 

 

 

 

 

5.A thread is caught in the hook race.

5.Remove the upper thread and bobbin

Page 73

 

 

 

case. Turn the handwheel backwards

 

 

 

 

and forwards by hand and remove the

 

 

 

 

thread remnants.

 

 

 

 

 

 

 

 

 

 

 

6.The machine is not plugged in.

6.Connect the power line plug to the

Page

9

 

 

electric outlet.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

76

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Image 81
Singer H74 instruction manual Problem Cause Correction Reference