JUKI LH-3500A Series - 4 Preparation of the Sewing Machine; Method of Lubrication

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4-1. Method of lubrication
For this sewing machine, one of two di󰀨erent lubricating methods can be selected.
(2) Method of non-circulation type lubrication (when only the clean oil is always used)
To ensure the long service life of the sewing machine, be sure to clean up the aforementioned
lter sections (at four locations) periodically (approximately once three months). When the lter
is clogged, lubrication trouble will occur and break-down will be caused.
In addition, when the oil becomes dirty, replace the oil gathered in the oil tank and the under cov-
er.
Insert inlet port
❶
for circulation into section
❸
of
the feed box cover until it will go no further to put it
into the state as it has been delivered to your plant.
* Drain oil dropped into the under cover by remov-
ing drain screw
❷
.
Filter for
circulation
Urethan lter
Plunger
4. PREPARATION OF THE SEWING MACHINE
Circulation
Lubrication to
hook side
❷
❶
❸
Filter for plunger
Lubrication
Oil tank
Ball oat case
Oil inlet lter
Reux oil
from hook
(1) Method of circulating lubrication (when the oil collected in the under cover is reused)
When inlet port for circulation
❶
comes
in contact with the oil surface, oil is
absorbed without passing the lter. As a
result, break-down will be caused.
If inlet port
❶
for circulation is not insert-
ed into the feed box cover, oil may leak
from inlet port
❶
for circulation or the
quantity of oil in the hook may uctuate.