Replacing the upper knife
Cleaning and Oiling
When the upper knife becomes blunt, replace it as follows: A spare
knife is found in the accessories.
To keep the machine running smoothly, keep it clean at all times
and lubricate regularly.
⦁
Open the looper cover and the sewing table. Using the
brush (1) provided, remove any dust and lint that have
accumulated.
⦁
Remove the stitch plate with the screw driver and remove
any dust and lint from inside with the brush.
⦁
Apply a few drops of oil to the points indicated by arrows
(2).
1 Cleaning
2 Oiling
Make sure that the power plug is disconnected from
the main socket when doing maintencance work.
⦁
Open the looper cover.
⦁
Remove the screw with the spanner and detach the upper
knife.
⦁
Attach the new knife and tighten the screw a little bit to hold
the upper knife.
⦁
Bring the upper knife to its original position.
⦁
Set the lower knife driving arm to its lowest position by
turning the handwheel counter-clockwise.
⦁
Make sure to check that the edge of the upper knife is
approximately 0.5mm below the surface of the lower knife.
⦁
Tighten the screw and close the looper cover.
Maintenance
Use good quality machine oil all the time.
Contact your BERNINA dealer for details.
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