ii
Disassembly of Thread unit L (Removal of Thread catching spring case) .................................2 - 21
Bobbin winder mechanism ...............................................................................2 - 22
Removal of Bobbin base assy. .........................................................................................................2 - 23
Disassembly of Bobbin base assy. ..............................................................................................2 - 23
Removal of Bobbin winder assy. .....................................................................................................2 - 24
Disassembly of Bobbin winder assy. (Removal of SW assy : BW-F) ........................................2 - 24
Disassembly of Bobbin winder assy. (Removal of BW shaft holder assy.) ................................2 - 24
Disassembly of Bobbin winder assy. (Removal of Bobbin winder shaft stopper) .....................2 - 25
Disassembly of Bobbin winder assy. (Removal of SW adjust plate) ..........................................2 - 25
Feed mechanism .............................................................................................2 - 26
Removal of Tension pulley assy. .....................................................................................................2 - 27
Removal of Lower shaft bushing .....................................................................................................2 - 27
Removal of Inner rotary hook assy. .................................................................................................2 - 27
Removal of Feed module .................................................................................................................2 - 28
Needle bar, presser mechanism / Upper shaft mechanism .............................2 - 29
Removal of Bushing presser (For upper shaft) ................................................................................2 - 30
Removal of Upper shaft assy. ..........................................................................................................2 - 30
Removal of Coaching clip ...............................................................................................................2 - 30
Removal of Needle-presser module .................................................................................................2 - 31
Removal of Plate spring ...................................................................................................................2 - 31
Base plate and handle .....................................................................................2 - 32
Removal of Base plate .....................................................................................................................2 - 33
Removal of Inlet assy. .....................................................................................................................2 - 33
Removal of Adjusting screw assy., Base rubber A ..........................................................................2 - 33
Removal of Handle ..........................................................................................................................2 - 34
Needle-presser module ...................................................................................2 - 35
Removal of Presser feed holder assy. ..............................................................................................2 - 36
Removal of BH switch assy. ............................................................................................................2 - 36
Removal of Thread take-up lever link .............................................................................................2 - 36
Removal of Needle bar crank rod assy. ...........................................................................................2 - 37
Removal of Needle bar assy. ...........................................................................................................2 - 38
Disassembly of Needle bar assy. .................................................................................................2 - 38
Removal of Shaft assy. ....................................................................................................................2 - 38
Removal of Needle bar supporter assy. ...........................................................................................2 - 39
Removal of Threader hook assy. .....................................................................................................2 - 39
Removal of Zigzag adjusting nut .....................................................................................................2 - 39
Removal of Needle holder shaft A ..................................................................................................2 - 40
Removal of PF switch assy. .............................................................................................................2 - 40
Removal of Presser foot lifter ..........................................................................................................2 - 40
Removal of Presser bar ....................................................................................................................2 - 41
Removal of Thread release lever .....................................................................................................2 - 41
Removal of Z zigzag lever assy. ......................................................................................................2 - 42
Removal of Z zigzag cam ................................................................................................................2 - 42
Removal of Rubber ..........................................................................................................................2 - 42
Removal of Z pulse motor ...............................................................................................................2 - 43
Removal of Lock nut .......................................................................................................................2 - 43
Removal of Shaft bushing ................................................................................................................2 - 43
Feed and bobbin module .................................................................................2 - 44
Removal of Needle plate A assy. .....................................................................................................2 - 45
Disassembly of Needle plate A assy. ..........................................................................................2 - 45
Removal of Feed dog .......................................................................................................................2 - 45
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