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Needle thread unit
Main unit
Disassembly
Disassembly
3 Hook holder assembly removal
1. Remove the cap 1.
2. Remove the hook holder assembly 2, and then remove the spring
and the hook holder axis B assembly.
*Key point
• The hook holder assembly's tab is engaged in the groove on
the hook holder axis B.
3. Remove the set collar assembly.
4. Remove the screw 1 from the hook holder axis B, and then remove the
bush.
2
1
1
S56
S56
4 Rack and hook holder link removal
1. Remove the 2 screws 1, and then remove the needle thread sensor
assembly.
2. Remove the 2 retaining rings E4, and then remove the rack assembly.
3. Remove the retaining ring E3, and then remove the hook holder link from
the rack assembly.
1
Retaining ring E4
Retaining ring E3