Main unit
1-5
Assembly of Thread unit L (Attachment of Thread guard cover)
1. Attach the thread guard cover 1 to the Thread unit L 2.
*Key point
• Attach it while lifting the section 4 of the thread guard cover
1 to get over the boss 3 of the Thread unit L 2.
• Check that the protrusions 5 (2 locations) of the Thread unit L
2 engaged with the gullets 6 (2 locations) of the thread
guard cover 1.
Thread tension mechanism
1
6
1
6
3
5
2
5
4
2
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