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3) Filter Replacement Procedure
Remove the magnet
and filter element
in the filter
and wash
them once a month after the first operation of the machine.
4) Adjusting the amount of oil in the hook and cleaning the hook filter
Oil amount in the hook
(1) Oil splashes from the race surface as illustrated in the sketch.
(2) When the oil adjusting screw
is fastened (turn the screw clock-
wise), the oil amount in the hook is decreased.
(3) When the oil adjusting screw
is loosened (turn the screw coun-
terclockwise), the oil amount in the hook is increased.
(Caution)
The adjusting screw
can be turned by a quarter revo-
lution, within which the amount of oil in the hook can
be adjusted from the minimum to the maximum value.
If the adjusting screw
is excessively turned, the rub-
ber ball
placed inside the tapped hole will be crushed
and the amount of oil in the hook will no longer be ad-
justed. So take the greatest care.
How to clean the Filter in the Hook
If the filter
is clogged, the machine cannot be oiled. So it is neces-
sary to clean the filter periodically. Clean the filter following the proce-
dure described below.
(1) Remove the hook from the main unit of the sewing machine. Loosen
the oil amount adjusting screw
and take out the rubber ball
placed inside the tapped hole.
(2) Blow air to the tapped hole of the oil amount adjusting screw
.
Adjustment Procedure
Results of Improper Adjustment
o If the filter element
is clogged
with dust or the like, a return oil
flow may fail. In this case, oil may
overflow the top of the hook driving
shaft saddle, resulting in oil
leakage.
o If the oil amount in the hook is in-
sufficient, the hook may generate
heat. As a result, the hook will soon
wear out, so causing seizure.
o If the oil amount in the hook is ex-
cessive, the thread or material may
be stained with oil. Also, the oil
consumption will be larger.