– 5 –
(1) For the LH-4128 models of sewing machine without a thread trimmer, the throat plate, feed dog and presser
foot developer for the LH3128, LH-512 and LH-515 are applicable. Furthermore, commercially available thread
trimmer, throat plate, feed dog and presser foot can also be used with them.
(2) The machine oil (JUKI New Deflex Oil No.1) shall be supplemented so that the level gauge remains in the range
between the upper and lower engraved marker lines of the oil tank.
4. Special notes for safe operation
Upper engraved maker line
Lower engraved maker line
(3) When the sewing machine is operated for the first time or when it is reused after a long time of storage, running-
in operation shall be carried out at a speed of 3,000rpm or below. At that time, a few drops of machine oil shall
be applied to the section indicated by the arrow.
(Caution) Never lubricate inside of the face plate section. (No lubrication is required because a grease
lubrication system is adopted.)
o Hook race surface (left and right) o Hook shaft base
*Apply a lubricant to Gears and Felt that is
located beside the gears.
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