– 28 –
6-3. Adjusting the inner hook guide
[LH-4128, 4128-7 and 4168-7]
) Standard adjustment value of the openng
of the nner hook stopper s 0.3 mm. Adjust
the handwheel to engraved markers
3
n the
center of three engraved markers, make the
nner hook gude
1
come n contact wth the
nner hook whle pressng the clck of nner
hook in the direction of the arrow to fix the
nner hook gude.
When the nner hook gude
1
is fixed at
the poston of small engraved marker
2
,
the openng of the nner hook stopper s
decreased, and when it is fixed at the position
of large engraved marker
4
, the openng of
the nner hook stopper s ncreased.
4
3
2
1
WARNING :
Turn OFF the power switch and ascertain that the motor totally stopped before starting the work so
as to prevent personal damage caused by abrupt start of the sewing machine.
LH-4128, 4128-7, 4168-7
LH-4188-7
[LH-4188-7]
) Turn the handwheel n the normal drecton
untl nner hook gude
1
has entrely
wthdrawn from ts workng poston.
2) Turn bobbn case
2
n the drecton of arrow
mark untl nner hook stopper
3
rests n the
groove on throat plate
4
.
3) Loosen setscrew
5
n the nner hook gude
and provde a clearance of 0.3 to 0.4 mm
between the nner hook gude and protruson
A
on the bobbn case.
1
2
4
3
A
5
0.3 to 0.4 mm