5.
DETACHING
AND
ATTACHING
THE SEWING HOOK
(1) Detaching the sewing hook.
(a)
Open the bed slide
..
(b) Bring up
the
presser foot and
remove
the
throat
plate.
(c) Loosen 2 hexagon socket head
screws
(CD
of
Fig.24), which fix
a sewing
hook
to
it's driving shaft,
by
using a hexagonal spanner
stored in the accessory box.
(d) Bring up the needle
at
it's
top
dead point
by
manually rotating
the
handwheel and take out
the
sewing hook upwards.
(2) Attaching the sewing hook
(a)
Reverse the procedures mentioned in
(1
).
Fig.
24
(b) Before attaching the
throat
plate, manually rotate the bobbin case holder so
that
the protruding part thereof agrees with the groove on the
throat
plate.
6.
ADJUSTING THE HEIGHT OF
THE FEED
DOG
The standard height
of
the
feed dog
measuring from the
top
surface
of
the
throat plate
is
0.8mm(l/32"),
as
shown
in
Fig.25. Adjust it,
if
necessary, by
loosening 2 screws which set the feed
dog.
-
14-
Fig.
25
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