Preparation Of The Sewing Machine; Method Of Lubrication - JUKI LH-3500 Series Instruction Manual

4. PREPARATION OF THE SEWING MACHINE

4-1. Method of lubrication

() Method of circulating lubrication (when the oil collected in the under cover is reused)
Filter for plunger
Filter for plunger 2
Urethan filter
Periodically (approximately once in three months) clean the aforementioned filter sections (four
places) in order to use the machine for a long time. When the filter 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 cover.
(2) Method of non-circulation type lubrication (when only the clean oil is always used)
3
Lubrication to hook side
Plunger
Circulation
1
2 2
– 8 –
Circulation
Lubrication
Put cap 3 to inlet port for circulation 1 in the
same state as that at the time of delivery, and
securely fix it to the position where it does not
come in contact with the moving section.
* Remove drain screw 2 and dump the oil
which has dropped to the under cover.
When inlet port for circulation 1 comes
in contact with the oil surface, oil is
absorbed without passing the filter. As a
result, break-down will be caused.
In addition, when cap 3 is not inserted,
oil leakage from inlet port for circulation
1 or unstableness of oil amount in the
hook may occur.
Oil tank
Filter for circulation