JUKI LU-1510 Engineer's Manual page 29

Adjustment Procedures
1. Put sponge ② in oil reservoir ① and fill the oil reservoir with
oil so that the oil surface is higher by 1 mm than the upper
surface of the sponge.
Necessary amount of oil is approximately 500 cc.
2. Adjustment of the amount of oil in the hook is performed with
oil amount adjustment screw ③ after loosening nut ④ .
Turning the oil amount adjustment screw clockwise will
increase the amount of oil in the hook, or counterclockwise
will decrease it.
3. 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) • If oil is filled at once, the oil may overflow the
oil reservoir. So, be careful.
Results of Improper Adjustment
● When the amount of oil is short :
• Loose stitches will result.
• Hook is heated resulting in seizure.
● When the amount of oil is too much :
• Thread is stained with oil. Or, the
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cloth may be stained.