JUKI DDL-9000 Engineer's Manual page 46

★ Amount of oil in the hook
• Standard for the amount of oil in the hook and cautions are as follow :
○ Dotted line of amount of oil • • • When the oil stain is especially disliked
(Caution) Hook is apt to be affected by dust or the like as described in the previous page. It is
necessary to check the state of amount of oil periodically.
Take care of seizure of the hook under the severe conditions (continuous operation at
high speed or the like). In addition, take care of thread breakage.
○ Amount of oil is much (2 mm to up) : In case of severe conditions such as continuous operation at high
speed or the like
(Caution) If the amount of oil is too much, the sewing product may be stained with oil and oil in oil
tank reduces earlier than expected.
Approx. 70 mm
Oil splash confirmation paper
Dotted line
Small quantity of oil
(Fig. 2) Confirming method of amount of oil in the hook
1 to 1.5 mm
Appropriate range
(Fig. 3) Amount of oil in the hook
−
Oil splash
confirmation paper
Large quantity of oil
43 −
Machine bed
1.5 to 2 mm