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Adjustment procedures
Results of Improper adjustment
1) Orientation of the lubricating pin
When upper looper lubricating pin
❶
is set with oil inlet
A
faced
upward, lubricating hole
B
is in the lower section as observed
from this side. Take care not to mistake the orientation of oil inlet
A
.
2) Setting the lubricating pin
Remove the oil reservoir, loosen the setscrew and adjust the
clearance provided between upper looper lubricating pin
❶
and
upper looper holder pin
❷
to 0.6 to 0.7 mm using a thickness
gauge or the like.
(Caution) When assembling the upper looper holder pin
❷
,
the unbent part of the oil wicks
❸
in the upper loop-
er holder pin
❷
should face to the side of the upper
looper lubricating pin
❶
.
In addition, the oil wicks
❸
should not be hubbly to
the end face
B
of the upper looper holder pin
❷
.
* Refer to "4-(4) Positioning the upper looper holder" for the upper
looper holder pin.
o
If the oil inlet
A
does not face
upward, oil will not be fed result-
ing in seizure.
o
If the clearance provided be-
tween the upper looper lubri-
cating pin and the upper looper
bracket is too small, the related
components will come in contact
with each other.
o
If the clearance provided be-
tween the upper looper lubri-
cating pin and the upper looper
bracket is too large, oil will not
be fed resulting in seizure.
o
The assembly in the opposite di-
rection of the oil wicks
❸
causes
seizure.
