Replacing The Blade Of Built-In Thread-Cutter Unit - Bernina B 590 Service And Maintenance Manual

4.3.4.1 Replacing the blade of built-in thread-cutter unit

Attention:
Do not touch blade of knife, risk of injury!
Disassembly:
• Picture 1 – Start machine in service program,
select test 6e, remove presser foot, needle, and
stitch plate.Press thread cutter button on head
frame.
• Picture 2 – Press the green check button one
time.
• Picture 3 – The thread catcher moves to its right
position.
•
Picture 4 – Open the bobbin door. Slip a needle
between the first and second plate. This helps to
pull out the knife, and it'll mark the correct position
for reinsertion of the new knife.
Tip: Cover the hook drive area with a piece of fabric to
prevent screws from falling under the hook drive.
• Picture 5 – With the small TORX screwdriver
030475.51.01 remove the screw d (T8)
• Picture 6 – With the help of a small screwdriver
bring the blade backwards until it can be hold and
pulled out with tweezers.
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