Table of Contents
Advertisement
Adjustment Procedures
1. Adjustment of the lower shaft gear
(1) Pinch the lower shaft gear
. Press the gear holder
base side). Make rattle adjustments in thrust direction.
(Caution) Rattles in thrust direction may be adjusted to zero.
However, too much pressing may result in very much
sound or heat generation around the lower shaft.
(2) After adjustments, fix the lower shaft fixing screw
(3) Make similar adjustments for gears on opposite side.
2. Replacement of the lower shaft
(1) Since the right and left lower shaft gears
manufactured in a set, the lower shaft
required, together with the lower shaft gears
(Set part No.: 40044641)
(2) The lower shaft face and the gear face have their appropriate
directions of assembly. Conform to the assembly diagram.
*
When plunger groove is positioned downwards
o
the engraved marking L of the left-side lower shaft gear
lower side as the lower shaft gear
o
the engraved marking R of the right-side lower shaft gear
to lower side as the lower shaft gear
(Caution) The spacer B
For assembly, the wider side of the washer face should
be positioned on the hook shaft base side.
between Spacer A
in the direction of the arrow (hook shaft
of the lower shaft
should be replaced, as
is seen from Direction A.
is seen from Direction B.
comes in the shape of the step washer.
– 28 –
Results of Improper Adjustment
and Spacer B
If there is any rattling in thrust direc-
tion, the following difficulties may
arise:
o Rattles may increase in the
.
o Noise and heat generation may be
are
in a set.
comes to
comes
direction of hook rotation. This can
be a cause of sewing deficiency.
increased.
Advertisement
Table of Contents
