Singer 670 - To Remove And Replace Bobbin Case

To
Remove
And
Replace
Bobbin
Case
To clean
hook raceway,
remove
bobbin case
as follows:
Open
slide
plate
nd
remove
bobbin
and
throat plate.
Unlock
bobbin caso by
liftitig and
pulling
holder to right as shown.
Remove
bobbin
case from
machine.
Remove
all lint,
fluff,
loose
thread
ends or
any other
foreign
matter
by
means of
lint
brush.
Replace
bobbin
case
so that
groove
under
4
tension
spring
fits
on hook
raceway
and
fork
of bobbin
case
straddles
positioning
finger
A.
N
Push bobbin
case holder
to left
as shown>
un,il it
snaps
uown into
lock
position.
Replace
bobbin
am. throat
plate and
close
slide
plate.
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