54
Replacing the Upper Knife
To remove:
z
Open the looper cover.
x
Turn the handwheel toward you until the upper knife
reaches its highest position.
c
Remove the hexagonal bolt with the double-ended
spanner (use the small end) and remove the upper
knife.
q
Upper knife
w
Hexagonal bolt
e
Double-ended spanner (small end 5.5 mm)
To attach:
z Attach the new upper knife to the upper knife
supporter and partially tighten the hexagonal bolt.
q Upper knife
w Hexagonal bolt
r Upper knife supporter
x Turn the handwheel toward you until the upper knife
reaches its lowest position.
c Loosen the hexagonal bolt.
Adjust the position of the upper knife so that its blade
overlaps 1.0 mm to 1.2 mm (3/64˝) with the edge
of the lower knife as shown, and fully tighten the
hexagonal bolt.
t Lower knife
y 1.0 – 1.2 mm (3/64˝)
v Turn the handwheel toward you several times to check
the blade position.
b Close the looper cover.
CAUTION
Make sure to turn the power switch off before
replacing the upper knife.
q
w
e
z x c
q
w
t
r
y
z x c v b
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