BOBBIN
CASE
STOP
FINGER
BOBBIN
CASE
OPENER
REFERENCE
MARK
A
CAP
SCREW
REFERENCE
MARK
B
Fig.
33.
Bobbin
Case
Opener
Adjustment
GASKET
SOCKET
SCREWS
Fig. 34. Bobbin Case Opener Timing
REPLACING
SEWING
HOOK
CAUTION: The hook is equipped with a screw in the
hub for
adjusting
the
vertical
position of the hook
relative
to
the
throat plate
seat.
This
position is
set
with a gouge at
the
factory.
WHEN
REPLACING A
HOOK, CARE MUST BE TAKEN TO SEE THAT THE
BOBBIN CASE STOP FINGER,
SHOWN
IN FIG. 33,
FITS
CORRECTLY
IN
THE
THROAT
PLATE.
For
correct adjustment,
see
instructions
concerning hook
height adjustment on page 12.
ADJUSTING
BOBBIN
CASE
OPENER
The
bobbin
case
opener,
shown in
Fig.
33,
should
be
set
so that it touches the bobbin cose as lightly
as
possible
and turns the bobbin
cose
enough to moke
a
sufficient
opening for
the
free
passage
of thread
between
throat
plate
and bobbin
case.
TIMING
BOBBIN
CASE
OPENER
Turn machine pulley over toward you until lower
timing mark on needle bar is even with edge of needle
bar frame on upward stroke of
needle.
When
needle
bar
is
in
this
position,
reference
mark A
should
line
up with reference mark B on hook saddle, as indicated
in Fig. 33. If opener shaft is out of time, tip machine
back and loosen socket screws
shown
in Fig. 34.
Return machine to upright position and turn opener
driving shaft with screw driver in cap screw shown
in
Fig. 33. Tighten socket screws
in
opener
driving
gear
hub.