Singer 251-2 - Page 8

From the library of Superior Sewing Machine & Supply LLC - www.supsew.com
7
ADJUSTMENT
OF ROTATING
HOOK
OIL FLOW REGULATOR
Fig.
7.
Oil Flow
Regulator
in
Hook
Shaft
Bushing
The
sewing
hook
is
automatically
lubricated.
The
flow
of
oil
is
controlled
by
Oil
Flow
Regulotor
140551,
Fig.
7.
The
Oil
Flow
Regulator
140551
is
set
at
the
factory
for
automatic
lubrication
of
the
hook
under
overage
~ewing
conditions.
Turn
Regulator
Thumb
Screw
(see
140551,
Fig. 7)
clockwise to increase
the
flow
of
oil
to
the
hook
os
indicated
by
the
(-)
sign
under
its
arrow
on
the
he.
:l
of
the
thumb
screw.
Turn
Regulator
Thumb
Screw
counterclockwise
to
decrease
the
flow,
as
indicated
by
the
(-)
sign
under
its
arrow
on
the
head
of
the
thumb
screw.
To
determine
whether
the
oil
is
properly
flowing
to
the
hook,
withdraw
the
bed
slide
and
hold
a
piece
of
thin
paper
under
the
hook
while
the
machine
runs
for
ten
seconds.
There
should
be
a
pattern
of
three
oil
sprays
on
the
paper;
two
light
lines
on
the
outside
and
one
heavier
spray
in
the
center.
If
there
is
no
trace
of
oil
or
an
excessive
amount
of
oil
on
paper,
adjust
the
Oil
Flow
Regulator,
as
instructed
above,
or
replace
the
oil
filter
143350,
Fig.
7,
in
the
head
of
the
hook
shaft,
os
instructed
on
page
28.
HINTS
FOR
PERFECT
OPERATION
If
the
sewing
hook
should
become
excessively
warm,
it
may
be
due
to
an
insufficient
supply
of
oil
to
the
hook
(see
instructions,
above,
for
adjusting
Oil
Flow
Regulator).
Keep
the
oil level
1n
the
oil
reservoir
at
the
HIGH
mark.
Clean
out
any
lint
or
other
waste
around
the
hook,
around
the
needle
slat
in
the
bobbin
case
holder
and
between
the
feed
rows
on
the
under
side
of
the
throat
plate.
Clean
out
any
lint
or
other
foreign
matter
that
may
have
collected
around
oil
return
passages,
particu-
larly
at
oil
return
hole
in
rear
arm
shaft
bushing.
When
in
operation,
the
top
of
the
machine
pulley
must
always
turn
over
toward
the
operator.
Always
keep
the
bed
slides
closed
when
the
ma-
chine
is
in
operation.
Do
not
run
the
machine
with
the
presser
foot
resting
on
the
feed
without
some
fabric
under
the
presser
foot.
Do
not
run
the
machine
when
both
bobbin
case
and
needle
are
threaded
unless
there
is
material
under
the
presser
foot.
Do
not
try
to
aid
the
machine
by
pulling
the
fabric
lest
you
bend
the
needle.
The
machine
feeds
the
work
without
assistance.
NEVER TOUCH
THE
STITCH REGULATOR PLUNGER
WHILE
THE
MACHINE
IS
RUNNING.