To clean stitch-forming mechanism of machine 20ik, To remove bobbin case, To replace bobbin case – SINGER 404K User Manual
Page 27
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Gleaning and Oiling—(Continued)
To Clean Stitch-Forming Mechanism of Machine 20IK
(See Fig. 56)
To Remove Bobbin Case
Raise needle and presser foot.
Draw slide plate to the left.
Remove bobbin from case.
Turn
hand
wheel
over
toward
you until end of hook ring E is
toward the front of machine, as
shown.
Insert
blade
of
screwdriver
into
slot C between the ring and the
edge of spring.
Press
down
and
at
same
time
give
screwdriver
one
half
turn
so that it will drop into the slot
and unlock the spring.
Hold
hand
wheel
with
right
hand.
With
left
hand,
place
screw
driver against the edge of the slot
in the ring and push it around
in the opposite direction to hook
rotation until cut-out B is oppo
site spring D.
Lift out ring and bobbin case.
To Replace Bobbin Case
Place bobbin case in position with
finger A in the opening in the plate
under the feed dog, as shown.
Turn
bobbin
case
back
and
forth
slightly to ensure proper seating.
Place ring E in position with cut-out
B opposite spring D.
Press ring into place and turn it in
direction
of
hook
rotation
until
spring locks it in position.
Replace bobbin.
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