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(6) Adjustment of inner hook presser position
WARNING :
Be sure to turn the power OFF before the following work in order to prevent personal injury due to
unintentional starting of the sewing machine.
Standard adjustment
Inner hook presser position
Needle entry
❶
About the standard part numbers
Inner hook
* As seen from above, after removing
the throat plate
Part name
MS type (Semi-dry)
SH (SJ) type (Micro-quantity lubrication)
Inner hook presser
40089607
40089610
Convexity of metal A
(from machined surface)
Convexity
of Hook shaft B
1.8
9.9
❶
❷
Plunger position
Hook shaft end
Hook shaft position
A
B
Reference hole
33 ± 0.15
