White 447 - Bobbin Case Threading; Replacing the Bobbin Case

Bobbin
Case
Threading
1. Hold
the
bobbin
case
with
left
hand.
Insert
the
bobbin
into
bobbin
case,
with
about
4
inches
(10
cm)
of
thread
trailing.
2.
Pull
the
trailing
thread
into
the
slot of
the
bobbin
case.
3.
Draw
thread
under
the
tension
spring
between
the
forkshaped
open
ing.
To
Replace
Bobbin
Case
REMOVE
BOBBIN
CASE
1.
Open
the
cover
plate.
2.
Hold
the
bobbin
case
latch
between
left
thumb
and
forefinger.
3.
Pull
out
bobbin
case
from
the
shuttle.
INSERT
BOBBIN
CASE
1.
Allow
hanging
about
4
inches
(10
cm)
of
thread
from
bobbin.
2.
Hold
the
bobbin
case
latch
between
left
thumb and
forefinger
and
open
fully,
otherwise bobbin
comes
off
from
the
bobbin
case.
3.
Fit
the
bobbin
case
into
the
stud
of
shuttle
with
the finger
of
bobbin
case
against
the
notch
of
race
cover.
NOTE:
If
bobbin
case
is not
properly
fitted
it
will
come
out
from
the
shuttle
after
running
the
machine.
—10--