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Adjustment Procedures
The amount of oil in the hook can be adjusted with oil amount adjusting screw 1.
1) Adjusting procedure
Turning (clockwise) oil amount adjusting screw 1 increases the oil
amount in the hook and turning (counterclockwise) it decreases the oil
amount in the hook.
(Caution) 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.
number of revolution at the time of delivery. When you always
use the sewing machine at low 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 speed, perform the
adjustment of the amount of oil in the hook.
3. Do not use the sewing machine with oil amount adjusting screw
1 pressed in (amount of oil in the hook is maximum).
Oil pressure in hook shaft 4 is increased, and air-tight
performance of hook shaft front oil seal 5 is deteriorated.
In worst case, oil in the hook may leak out. So, be careful.
<<Replacing procedure of hook shaft oil wick>>
1) Hook shaft oil wick 2 is a consumable part.
To stabilize the oil amount in the hook, it is recommended to periodically replace it.
Hook shaft oil wick 2 is mounted on the top end of hook shaft 4.
Remove the needle and the parts around the needle (presser foot,
needle, throat plate, feed dog, hook and woodruff plate), put a spanner,
top end of which is L-shaped to screw 3 section of hook shaft oil wick,
turn the handwheel in the normal direction of rotation by hand, and
draw out the screw. It is possible to replace hook shaft oil wick 2 while
hook shaft 4 is not removed. If hook shaft 4 is drawn out, refer to 5-
(9) Protruding amount of the hook shaft.
2) Hook shaft oil wick screw 3 (B1808552000) in which hook shaft oil wick
2 (11015906) is entered is assembled in hook shaft 4. Draw out the old
hook shaft oil wick 2 in hook shaft oil wick screw 3 and push a new hook
shaft oil wick 2. At this time, be sure to check that hook shaft oil wick 2
has entered up to the end of hook shaft oil wick screw 3.
™ When re-assembling, check that the hole at the top end of hook shaft oil
wick screw 3 is not broken.
3) Assemble hook shaft oil wick screw 3 to the top end of hook shaft 4.
Name of part
2
Hook shaft oil wick
3
Hook shaft oil wick screw
<<Cautions when using dry hook>> When using the dry hook with the
standard machine (oil lubrication machine)
1. Remove the components around the needle, and remove hook shaft
oil wick screw 3 (B1808552000) in hook shaft 4 with the L-shaped
spanner.
2) Purchase a hook shaft stopper screw (11079506)and assemble it in
hook shaft 4.
3) Adjust oil amount adjusting screw 1 and decrease the amount of oil in
the hook as less as possible.
* Amount of oil in the hook in this step means the lubrication between
hook shaft front bushing and hook shaft.
If the amount of oil is adjusted to "0", seizure of machine head will be
caused due to insufficient lubrication.
4) Install dry hook (hook assembly D) and bobbin case for dry hook (bobbin
case D3 (assembly).
5) Use the sewing machine at the max. sewing speed of 4,000 rpm.
™ Replacement parts when using the machine as the dry-hook type
No
Name of part
1
Hook shaft stopper screw
2
Hook assembly D
3
Bobbin case D3 (assembly)
Part No.
11015906
B1808552000
Part No.
Q'ty
11079506
1
23557259
1
40003609
1
35
−
−
Results of Improper Adjustment
™ When oil wick is stained, decrease
of oil amount in the hook or
unstableness of oil amount will
result.
™ When hook shaft oil wick 2 is not
entered up to the end of hook shaft
oil wick screw 3, hook shaft oil wick
screw 3 comes off during operation
and the oil amount in the hook
cannot be adjusted.
Besides, hook shaft oiling inlet is
closed and oil amount in the hook
is hard to be obtained.
™ When the hole is broken, replace
the screw with a new one.
Oil amount in the hook becomes
unstable.
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