26
C. As can be seen in figure 44, loosen tension-adjusting nut of
fixes knife with wrench box and then adjust with tension
adjusting screw. After adjusting, tighten the nut using
wrench box.
[Figure 44]
Movable knife
Wrench box
Fixed knife
15) Exchanging movable knife
Manually turn pulley to place the thread at the highest and
remove the needle plate. Then, as in the figure 45, loosen two
fixing screws of the knife. To assemble, follow the reverse
order of disassembling.
[Figure 45]
16) Exchanging fixed knife
A. As can be seen in figure 46, loosen hook holder clamp
screw and then, pull out washer and hook holder. When is
done, disassemble fixed knife clamp screw.
To assemble, follow the reverse order of disassembling.
[Figure 46]
B. When the thread does not get trimmed or if the trimmed
section of the thread is sloppy, please check the edge
condition of the fixed knife. If the edge of the knife is too
dull, sharpen the edge using oil stone or sand paper as in
figure 47.
[Figure 47]
Fixed knife
Oil stone
