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6-20 Thread trimming
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Removethethroatplate,thebottomcoverofthefreearmandtheuppercoverofthefreearm.
6-20-1 Attaching/removing the thread trimmer unit
How to remove the thread trimmer unit
1. Remove the micro switch setscrew. Detach the micro switch.
2. Detach the connector of the thread trimming motor.
3. Remove two setscrews of the thread trimmer unit. Detach the thread trimmer unit.
Micro switch
Thread trimmer unit
Setscrews of the thread trimmer unit
Micro switch
setscrew
Thread trimming
motor
Parallel
Moving knife
How to attach the thread trimmer unit
Reversing the removal procedure, attach the thread trimmer unit.
(Caution) Attach the thread trimmer unit so that the moving knife is in parallel with the free arm.
Motor connector