Singer 251-2 - Timing the Sewing Hook

From the library of Superior Sewing Machine & Supply LLC - www.supsew.com
21
TO
TIME
THE
SEWING
HOOK
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•.
.;:-~...:
.
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PREPARATION:
-~:."i,...
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Fig. 34. Checking the Timing
of
the
Hook
(Viewed
from
Front)
LOWER
TIMING
MARK
E27559
Remove
presser
foot,
slide
plate,
throat
plate
and
feed
dog.
Remove
face
plate
on
machines
on
which
timing
marks
are
on
upper
half
of
needle
bar.
CHECK:
ON
MACHINES
ON
WHICH
TIMING
MARKS
ARE
ON
UPPER
HALF OF
NEEDLE
BAR-
When
lower
timing
mark
on
needle
bar
is
level
with
lower
end
of
upper
needle
bar
bushing
A
as
shown
in
Fig.
34,
the
point
of
the
sewing
hook
should
be
at
the
center
of
the
needle,
as
shown
in
enlarged
view
in
Fig.
35.
~k---
LOWER
K/
TIMING
MARK
t
ON
UPWARD
STROKE
Fig.
34A.
Checking
the
Timing
of
the
Hook
on
Machines
with
Timing
Marks
at
Lower End
of
Needle
Bar
. HOOK POINT
'
I
AT
CENTER
OF
NEEDLE
1
-J,
-
~
'✓-,
.,,
;r_,
.,,.-,,.,...~~_,.,."'~.-
fig.
35.
Timing
the
Hook
(Viewed
from
Rear)
...
/~·~
ON
MACHINES
ON
WHICH
TIMING
MARKS
ARE
ON
LOWER HALF
OF
NEEDLE
BAR-
When
lower
timing
mark
on
needle
bar
is
level
with
lower
end
of
lower
needle
bar
bushing K
as
shown
in
Fig.
34A,
the
point
of
the
sewing
hook
should
be
at
the
center
of
the
needle,
as
shown
in
Fig.
35.
TIMING:
Loosen
two
set
screws
L,
Fig.
35
in
hub
of
hook.
Turn
hook
on
its
shaft,
as
required
to
bring
point
of
hook
to
center
of
needle,
as
shown
above.
Make
certain
that
hub
of
hook
is
against
oil-re-
taining
collar;
then
securely
tighten
screws
L.