JUKI LU-1510 Engineer's Manual page 31

Adjustment Procedures
1. Insert the projection located at the bottom of oil tank ① into
the waste oil hole of the oil pan.
2. Insert oil pipe ② into filter ③ of the oil tank and fix the pipe
with a clip.
3. Pour the JUKI New Defrix Oil No. 2 into the oil tank until HIGH
level is reached.
4. Add the same lubricating oil up to HIGH level as soon as the
oil level has come down to LOW level.
5. After the lubrication, you can see from oil sight window ⑤
that the oil rises up when the operation is normal.
(However, the machine should run at 1,500 rpm or more.)
◯ Cleaning the oil tank
1. Remove the oil pipe from the oil tank.
2. Remove butterfly nut ⑥ and take out cover (upper) ⑦, filter
⑧ and cover (lower) ⑨ to clean the oil tank.
3. Remove filter case setscrews ⑩, and clean filter element ⑪
located on the inside of the filter case and magnet ⑫ .
4. When replacing the oil in the oil tank, remove stopper ⑬ in
the oil tank. Then, the oil can be drained from the installing
port of the waste oil container in the oil pan.
After draining, securely set the stopper to the oil tank.
When taking out the oil tank, take it out after draining the oil.
5. Fix the filter case in which the filter element and the magnet
are placed to the cover (upper) with the setscrews.
6. Place the cover (lower), the filter and the cover (upper) in
order in the oil tank, and fix them with the butterfly nut.
7. Insert the oil pipe into the oil tank and fix it with a clip.
Fill the oil tank with JUKI New Defrix Oil No. 2 up to HIGH
level.
◯ Adjusting the amount of oil in the hook
1. Adjustment of the amount of oil in the hook is performed with
oil amount adjustment screw ⑭ after loosening nut ⑮ .
Turning the oil amount adjustment screw clockwise will
decrease the amount of oil in the hook, or counterclockwise
will increase it.
2. The appropriate amount of oil, when a sheet of paper is placed
near the periphery of the hook, is to such an extent that
splashes of oil from the hook appear in approximately five
seconds as shown in the figure on the left.
(Caution) • Approximately once a month, clean the oil tank
and the filter case.
If the filter is clogged with soil, lubrication fails
resulting in trouble.
Results of Improper Adjustment
● When the amount of oil is short :
• Loose stitches will result.
• Hook is heated resulting in
● When the amount of oil is too much :
• Thread is stained with oil. Or, the
− 28 −
seizure.
cloth may be stained.