Singer 251-2 - Upright Arm Shaft Removal and Replacement; Removing the Upright Arm Shaft; Replacing the Upright Arm Shaft

From the library of Superior Sewing Machine & Supply LLC - www.supsew.com
32
TO
REMOVE
AND
REPLACE
THE
UPRIGHT
ARM
SHAFT
(See Fig.
50)
L3
M3
REMOVAL:
If
it
is
found
necessary
to
remove
the
upright
arm
shaft
K3,
it
should
be
removed
in
the
following
manner:-
l.
Remove
oil
pump,
as
instructed
on
page
31.
2.
Follow
the
instructions
in
Steps
2
and
3
for
re-
moval
of
hook
shaft
on
page
30
except
that,
in-
stead
of
removing
hook
shaft,
merely
remove
heck
shaft
bevel
gear
54,
Fig.
48.
3.
Remove
arm
top
cover.
4.
Remove
screw
L3
and
oil
lead
M3.
5.
Remove
four
cap
screws
N3.
6.
Remove
oil
flow
window
cap
03,
window
P3,
oil
flow
body
R3
with
two
gaskets
03.
7.
Mark
the
two
bevel
gears
53,
with
chalk
or
cray-
on,
on
one
tooth
of
one
gear
and
the
correspond-
ing
space
between
the
teeth
of
the
other
gear
so
that
these
gears
may
be
re-assembled
in
their
original
relative
positions
without
difficulty,
if
necessary.
8.
Loosen
set
screws
T3
in
bevel
gear
at
upper
end
of
upright
arm
shaft.
9.
Make
certain
bevel
gear
at
lower
end
of
upright
arm
shaft
is
fastened
securely.
Then
while
hold-
ing
upper
bevel
gears
S3
in
mesh,
draw
upright
03
R3
03
P3
03
oeo0
N3
£224-10
Fig.
50.
Removing
Upright
Arm
Shaft
2.
Insert
upright
arm
shaft
up
through
upper
bevel
gear,
as
shown
in
Fig.
50.
3.
Turn
shaft
so
that
one
:if
the
two
set
screws
T3
will
bear
upon
the
upper
gear
flat
on
the
shaft
and
tighten
the
set
screws
T3.
4.
Replace
and
set
hook
shaft
bevel
gear
as
in-
arm
shaft
down
and
out
of
machine.
structed
in
Step
5
on
page
30.
REPLACEMENT:
1.
Before
installing
upright
arm
shaft,
make
certain
it
has
the
bevel
gear
L2,
Fig.
48
correctly
fastened
at
the
lower
end
of
shaft.
5.
Replace
oil
pump,
as
instructed
on
page
31.
6.
Replace
oil
flow
window
assembly,
1n
the
order
shown
in
Fig.
50.
7.
Replace
oil
lead
M3
and
arm
top
cover.