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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
Inner hook
❷
❶
Needle entry
* As seen from above, after removing
the throat plate
❶
About the standard part numbers
Part name
MS type (Semi-dry)
SH (SJ) type (Micro-quantity lubrication)
Inner hook presser
40089607
40089610
Hook shaft position
A
Convexity of metal A
Convexity
(from machined surface)
of Hook shaft B
1.8
9.9
B
Plunger position
Hook shaft end
Reference hole
33 ± 0.15
– 17 –
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