Steel ball
Spring
Cheining tongue
Cover plate
8-1. REPLACEMENT OF CHAINING TONGUE (EXCEPT BL3ATW)
8-2. REPLACEMENT OF CHAINING TONGUE
(BL3ATW)
a) Remove needle plate.
b) Loosen two screws of chaining tongue
cover plate and remove it.
c) Watching carefully not to jump out steel
ball, remove chaining tongue and replace it.
d) You are requied to check the fixing position
of the chaining tongue, after replacing it.
e) Rotate stitch length dial max. 4 to rolled hem max.4,
make sure the chaining tongue is moved smoothly
to rolled hem position.
7
180
Pin
Chaining tongue
holder pin
Chaining tongue
holder
Chaining tongue
holder pin
Adjusting
chaining
tongue
Adjusting
chaining
tongue
Screw
A
B
a) Move the pin to leftward.
b) Remove chaining tongue holder set
with adjusting chaining tongue.
c)Loosen screw of adjusting chaining tongue
and remove holder pin.
Replace the adjusting chaining tongue
with new one.
d)Make pararell between "A" (flat side of chaining
holder pin) and "B" (top surface of adjusting
chaining tongue), and tighten the screw
temporary.
e)Replace chaining tongue holder set, and
make sure that top of adjusting chaining
tongue is parallel with needle plate.
f)Remove chaining holder set again, tighten
the screw firmly.
g)Replace chaining holder set.
Chaining tongue
holder set
