SECTION IV. CARING FOR YOUR
MACHINE
Replacing
the upper knife
To remove:
(_ Upper knife
(_ Hexagon bolt
(_) Stopper pin
(_) Lower knife
Turn off the power switch and unplug the machine
Open the looper and side covers.
Turn the handwheel toward you until the upper knife
reaches its highest position,
Remove the hexagonal bolt and the upper knife..
To attach:
(_ Upper knife
(_) Hexagon bolt
(_) Stopper pin
0 Lower knife
(_) 1/32" to 1/16" (O8-1,,5 ram)
Insert a new upper knife into the groove of the knife holder
and stopper pin, then tighten the hexagon bolt slightly.
Turn the handwheel toward you until the upper knife
reaches its lowest position,
Loosen the hexagon bolt and adjust the position of the
upper knife so that its blade overlaps the edge of the lower
knife 1/32" to 1/i6" (0.8 mm to 1.5 ram) as shown,
Then tighten the hexagon bolt firmly,
Close the looper and side covers.
Cleaning
the upper
knife area
Turn off the power switch and unplug the machine.
Open the looper cover,,
Brush the metal filaments to the front with the lint brush_
o You may use a vacuum cleaner to clean the upper knife
area and feed dogs.
• The lower knife will last over one year in normal use,
However, if you run over a pin or a hard object, you may
need to replace both upper and lower knives at the
same time.
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Capítulos
