Lower Thread Tension (Thread Tension Of The Bobbin Case) - Husqvarna VIKING 350 Service Manual

19. Lower thread tension
(thread tension of the bobbin case)
Check
1. Insert a full bobbin into the bobbin case.
2. The thread tension spring of the bobbin case shall give a resistance of 12 - 20 g when
pulling the thread slowly.
Adjustment
1. Turn screw (A) until the correct thread tension is obtained.
NOTE ! Before any adjustment is made remove any loose pieces of thread or fluff from
the thread tension discs
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