Use the included cleaning brush to remove ; any lint and dust from the moving knife, the ; fixed knife, the thread retaining plate, and - Page 249

Maintenance

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Use the included cleaning brush to remove 
any lint and dust from the moving knife, the 
fixed knife, the thread retaining plate, and 
their surrounding areas.

1

Remove all lint in this area

4

After cleaning is finished, attach the needle 
plate in the opposite way that it was 
removed in step 

2

.

1

Needle plate

Cleaning the bobbin case

Thread wax and dust easily collect around the hole 
in the tension-adjusting spring on the bobbin case, 
resulting in an incorrect thread tension. Therefore, 
it should be cleaned each time when the bobbin is 
changed.
Use a piece of paper with the thickness of a 
business card.

1

Open the hook cover, remove the bobbin 
case, and then remove the bobbin. (Refer to 
page 36.)

2

Slide the paper under the tension-adjusting 
spring to remove any dust.

Use a corner of the paper to remove any dust 
from around the hole.

1

Tension-adjusting spring

2

Hole

3

Paper