Singer H74 Instruction Manual page 81

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.Rethreadthe 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
] .Select the correct foot. Page 77
Patterns are Page ] 9
distorted Page 28
Page 73
The machine
jams
1 .The correct presser foot is not used.
2.The needle thread tension is too tight.
3.The stitch length is not suitable for the
fabric being sewn.
1.Thread is caught in the hook.
2.The feed dogs are packed with lint.
2.Loosen the thread tension.
3.Make a stitch adjustment and add
stabilizer to the fabric.
Remove the upper thread and bobbin
case. Turn the handwheel backwards and
forwards by hand and remove the thread
remnants.
1.Clean the hook and feed dog as
described.
2.Replace the needle.
1.Lint or oil have collected on the hook or
needle bar.
2.The needle is darnaged.
3.Slight humrning sound coming from
internal motor.
4.Thread is caught in the hook.
5.The feed dogs are packed with lint.
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Page 23
The machine 3.Normal. --
is noisy
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1 .Poor quality thread. Page 22
Uneven 2.The bobbin case is threaded wrong. Page 12
stitches,
uneven feed 3.Fabric has been pulled. --
1 .The machine is not turned on. Page 9
2.The Start/stop button was not pressed. Page 24
3.The presser foot lever is raised. Page 17
4.The Start/stop button was pressed, even Page 24
The sewing though the foot controller is connected.
machine
doesn't
operate 5.A thread is caught in the hook race. Page 73
6.The machine is not plugged in. Page 9
Remove the upper thread and bobbin
case. Turn the handwheel backwards and
forwards by hand and remove the thread
remnants.
1.Select a better quality thread.
2.Remove the bobbin case, the thread
and reinsert correctly.
3.Do not pull on the fabric while sewing,
let it be taken up by the machine.
1.Turn on the machine.
2.Press the Start/stop button.
3.Lower the presser foot lever.
4.Do not use Start/stop button when the
foot controller is connected. To use
Start/stop button, disconnect the foot
controller.
5.Remove the upper thread and bobbin
case. Turn the handwheel backwards
and forwards by hand and remove the
thread remnants.
6.Conned the power line plug to the
electric outlet.
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