(1) The oil holes on the nose, lubricate the upper shaft and the components connected to the upper shaft.
(2) Parts inside the panel and moving parts connected to each part.
Lubrication pressure foot pole and needle rods as well as parts connected to them.
(3) Wipe and add less oil to the activity of the lower part of the machine board. The amount of refueling between the refueling hole and the refueling part should not be too much, one or two drops on the line.