– 44 –
(31) Adjustment of the shuttle upper spring position (Except for LK-1900B-BS,
1900B-BF, 1903B-BS, 1900BN-BS, 1900BN-BF and 1903BN-BS)
WARNING :
Turn OFF the power before starting the work so as to prevent accidents caused by abrupt start of the
sewing machine.
Procedures of disassembling
For the right and left positions, the needle center is made to coincide with the center of the groove width
C
.
For the front and rear positions, the needle rear end is made to coincide with the corner part
A
.
(Caution) If Part
B
is damaged, this is the cause of thread breakage, hangnail of thread, stain on
thread, etc. Therefore, this part should be polished by the use of a buff or the like. In par-
ticular, the rear side should be handled with care.
*
For the LK-1900B-BS, 1900B-BF, 1903B-BS, 1900BN-BS, 1900BN-BF and 1903BN-BS refer to section 3.-(41).
(32) Shuttle felt
WARNING :
Turn OFF the power before starting the work so as to prevent accidents caused by abrupt start of the
sewing machine.
Standard adjustment
Two pieces of the shuttle felt
❶
are inserted in the holes of the shuttle race
❷
. Conrm that the shuttle
felts
❶
are not overloaded when the inner hook is set and turned along the shuttle race
❷
.
Shuttle
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