JUKI DDL-900A-S - Attaching the Sewing Needle Correctly

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1) The amount of oil shown in the samples on the
left should be nely 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) Check the oil amount (oil splashes) three times
(with three sheets of paper).
Splashes of oil from the hook
1 mm
Appropriate amount of oil (small)
(3) Sample showing the appropriate amount of oil in the hook
Appropriate amount of oil (large)
2 mm
Splashes of oil from the hook
①
Amount of oil (oil splashes) conrmation paper
②
Position to conrm the amount of oil
(oil splashes)
Oil splashes
conrmation paper
25 mm
70 mm
(4) Conrmation of the amount of oil supplied to the face plate parts
* When carrying out the work described below in
2), remove the face plate and take extreme cau-
tion not to allow your ngers to come in contact
with the thread take-up lever.
1) If the machine has not been sufciently 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) conrmation
paper under the hook immediately after the ma-
chine stops running.
3) Check to be sure that the oil surface in the oil
shield rests in the range between the "MAX. line"
and the "MIN. line".
4) The time required for the conrmation of the
amount of oil (oil splashes) should be completed
in ten seconds. (Measure the period of time with
a watch.)
1) Adjust the amount of oil supplied to the thread
take-up and needle bar crank ❷ by turning adjust
pin ❶.
2) The minimum amount of oil is reached when
marker dot A is brought close to needle bar
crank ❷ by turning the adjust pin in direction B.
3) The maximum amount of oil is reached when
marker dot A is brought to the position just
opposite from the needle bar crank by turning the
adjust pin in direction C.
Minimum
Maximum
❶
❷
A
B
C
❶
(5) Adjusting the amount of oil supplied to the face plate parts