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8. STANDARD ADJUSTMENT
8-1. Adjusting the amount of oil in the hook (LZ-2290A-SS • A-SU (-7)
)
WArNING :
Turn OFF the power before starting the work so as to prevent accidents caused by abrupt start of
the sewing machine.
Decrease
Increase
Adjustment of the amount of oil in the hook is per-
formed with oil amount adjustment screw
1
.
(1) Adjustment procedure
Tighten (turn clockwise) oil amount adjustment
screw
1
to increase the amount of oil in the hook,
or loosen (turn counterclockwise) to decrease it.
1. When adjusting the amount of oil in
the hook, perform the adjustment in a
way of reducing the oil amount after
somewhat increasing it.
2.
The amount of oil in the hook has been
adjusted at the max. sewing speed at the
time of delivery. When you always use the
sewing machine at low sewing speed, there
is a possibility that trouble occurs due to
the lack of amount of oil in the hook. When
the sewing machine is used always at low
sewing speed, perform the adjustment of
the amount of oil in the hook.
3.
There is a possibility of causing oil leak-
age from the hook shaft section since
oil does not return to the oil tank when
oil amount adjustment screw
1
is used
in fully-tightened state. Do not use the
screw in fully-tightened state. In addi-
tion, when the amount of oil in the hook
is not obtained unless oil amount ad-
justment screw
1
is near in fully-tight-
ened state, it is considered that hook
shaft oil wick (JUKI Part No. 11015906)
is clogged or the like. Replace the hook
shaft oil wick. For the replacing proce-
dure, refer to (10) Replacing the hook
shaft oil wick of 9. MAINTENANCE.
WArNING :
Turn OFF the power before starting the work so as to prevent accidents caused by abrupt start of
the sewing machine.
8-2.
Adjusting the amount of lubricating to face plate section
(LZ-2290A-SS•A-SU(-7))
It is not necessary to adjust the amount of lubricating to face plate section since it has been factory-
adjusted at the time of delivery. (Oil amount adjustment screw
2
in the face plate section lubricating tank
is hidden with stop plug
1
since it is not necessary to be adjusted.)
When the adjustment is performed by mistake (mistaken as the adjustment of oil amount in the hook), re-
adjust as shown below.
1) Remove stop plug
1
, and when lightly tightening
the adjustment screw
2
, return the screw by ap-
proximately 0.6 turn from the stop position.
2) In case of the normal state, the ow of oil can
be conrmed (direction of the arrow in the illus-
tration). In case the ow is stopped, be sure to
adjust. (Worn-out of the mechanism of face plate
section will be caused.)
Lightly tighten the screw
2
. Be careful
that it is not excessively tightened.
1
2
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