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Singer 252 - Page 54

Singer 252
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Cam Stack and Shaft (258)
Removal:
1)
Remove D
2)
Set stItch wi
dth
lever on
..
Straight
Stitch
..
3)
Set
needle
pos,t,on lever on
..
Ri
ghi
N
eedle
..
4) Loosen screw A.
5) Remove cam stack assembly B.
Caution
on
Reassembly:
When reassembling cam
stack
un,t B, make
certain
that the
eccentric
portion
of shaft C faces to
the
right
as shown In fig 0 .
Gear mesh adjust:
1) Loosen set screw A.
2) Using
~
10 mm wrench. loosen the
disc
reta1n1ng spring
scre
w H and remove the
complete
disc
releasing
group
N.
3)
Remove spring M.
4)
Rotate
eccentr
ic shaft C
clockwise
until
there
Is
no
play
between
worm
gear
and
worm
on
shaft but without binding.
SJ
Tighten
set screw A and
check
for free movement by turning hand
wheel
for a
complete
rotation
on
worm
gear
(18
rotation
of
handwheel
J
6)
Reassembly the
group
N, taking
care
that the three releasing
spr
in
gs
be
i
ntroduced
into
longer
slots
of
the stud. and li
ghten
screw
H.
Not•
:
After
this ad
jus
tment
check
adj
ustment
on
sideways setting
of
needle
bar
as in m then
and
1IJ1
Pendulum timing adjust:
Check:
tJ Place a p,ece of
paper
under
needle
2)
Set
needle
position lever on • Center
Needle
•
and
stitch
wi
dth
lever
on
maximum
stitch
width.
3)
The
correct
t1m1ng
of the
pendulum
movement
of
the
needle
bar can
be
observed by manually
operating
the
handwheel
in the
normal
operat
ing
direction
. The
point
of the
needle
should
move
upw
ard until the
needle
is
completely
out
of
the
paper
before
mov
ing
in the lateral d
irection
and
shoul
d reach
its
peak
of
ascent
slightly
past
center
of
the
two
extreme
posit
i
ons
of
the
needle
. On the
downward
stroke
all
lateral
motion
should
cease when the
needle
point
is 3 to
6
mm
. (.
12
to .
24)
above
the throat
plate
. See fig. J 1.
The
needle
must return into the
oppos
ite
needle
hole
prec
isely.
Setting:
1)
Push disc releasing button F and
remore
the
in
terchangeable
d
isc
G.
2)
Loosen
slightly
the two screws E.
:l)
Turn
handwheel
un1II
cam
followe
r L ,s
in
a pos11Ion
corresponding
10
one of the
hig
h
lobes
on
the
cam
and the
needle
bar
is in its
lowest
pos
iti
on.
Maintain
i
ng
the
needle
bar
in
its
lowest
pos
ition, turn the
cam
stack
by hand
so
that
the
center
po
i
nt
of
cam
follower
L is
in
line
with
the
center
of the cam
as
shown In ftg K.
------

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