JUKI DDL-7000A-7 Series Instruction Manual page 10

(2) Adjusting the amount of oil (oil spots) in the hook
A
(3) Sample showing the appropriate amount of oil in the hook
Appropriate amount of oil (small)
Splashes of oil from the hook
1 mm
Appropriate amount of oil (large)
Splashes of oil from the hook
DDL-7000AS-7：2mm
DDL-7000AH-7：3mm
(4) Confirmation of the amount of oil supplied to the face plate parts
① Amount of oil (oil splashes) confirmation paper
70 mm
② Position to confirm the amount of oil
(oil splashes)
Oil splashes
confirmation paper
B
– 8 –
1) Turning the oil amount adjustment screw attached
on the hook driving shaft front bushing in the "+"
direction (in direction A) will increase the amount
of oil (oil spots) in the hook, or in the "–" direction (in
direction B) will decrease it.
2) After the amount of oil in the hook has been
properly adjusted with the oil amount adjustment
screw, make the sewing machine run idle for ap-
proximately 30 seconds to check the amount of oil
in the hook.
1) The amount of oil shown in the samples on the
left should be finely adjusted in accordance with
sewing processes.
Be careful not to excessively increase/decrease
the amount of oil in the hook. (If the amount of
oil is too small, the hook will be seized (the hook
will be hot). If the amount of oil is too much, the
sewing product may be stained with oil.)
2) Adjust the amount of oil in the hook so that the
oil amount (oil splashes) should not change while
checking the oil amount three times (on the three
sheets of paper).
* When carrying out the work described below in 2),
remove the face plate and take extreme caution
not to allow your fingers to come in contact with
the thread take-up lever.
1) If the machine has not been sufficiently warmed
up for operation, make the machine run idle for
approximately three minutes. (Moderate intermit-
tent operation)
2) Place the amount of oil (oil spots) confirmation pa-
per under the hook immediately after the machine
stops running.
3) Confirm the height of the oil surface in the oil
reservoir is within the range between "HIGH" and
"LOW".
4) The time required for the confirmation of the
amount of oil (oil splashes) should be completed
in ten seconds. (Measure the period of time with a
watch.)