Singer 247-4 User manual

SINGER
247-4 TO 247-7

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USE ONLY SINGER* OILS
and LUBRICANTS
They insure freedom from lubricating trouble and
give
longer life to sewing equipment
The following are the correct lubricants for this machine:
TYPE B -MANUFACTURING MACHINE OIL, HEAVY
GRADE
When a stainless oil is desired, use:
TYPE D -MANUFACTURING MACHINE OIL, STAIN-
LESS, HEAVY GRADE
OTHER SINGER LUBRICANTS
TYPE E -STAINLESS THREAD LUBRICANT
For lubricating the needle thread of sewing machines for
stitching fabrics or leather where a stainless thread lubri-
cant is required.
TYPE F -MOTOR OIL
For oil lubricated motors and plain bearings in power
tables and transmitters.
NOTE: All of the above oils are available in 1 quart,
1 gallon and 5 gallon cans or in 55 gallon drums.
GEAR LUBRICANT
This specially prepared grease is recommended for gear
lubrication on manufacturing sewing machines.
BALL BEARING LUBRICANT
This pure grease is specially designed for the lubrication
of ball bearings and ball thrust bearings of motors and
electric transmitters, ball bearing hangers of power tables,
etc. Furnished in 1 lb. and 4 lb. tins,
Copyright,U.S.A., 1923, 1931, 1940, 1941, 1949and 1950,
by The Singer Manufacturing Company
All Rights Reserved for All Countries
20453
ADJUSTERS MANUAL
FOR
SINGER*
SEWING
MACI-IINES
247-4, 247-5, 247-6 and 247-7
CAUTION: Special attention is called to the
lubricating instructions on pages 4 to 7.
0' A TRADE
MARK OF
T~~ SING~R MANUFACTURING CO.

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TO ALL WHOM IT MAY CONCERN:
The improper placing or renewal of the Trade Mark "SINGER" or
any other of the Trade Marks of The Singer Manufacturing Company
(all of which are duly Registered Trade Marks) on any machine that
has been repaired, rebuilt, reconditioned, or altered in any way whatsoever
outside a SINGER factory or an authorized SINGER agency is forbidden.
USING
Tl-IE IMPORTANCE OF
SINGER* PARTS AND NEEDLES
IN s
INGER MACHINES
The successful operation of SINGER machines can only be nssur ed
if SINGER parts and needles are used. Supplies are available al all
SINGER Shops for the Manufacturing Trade, and mail orders will receive
prompt attention.
SINGER Needles should be used
in SINGER Machines.
These Needles and their Containers
are marked with the
Company's Trade
Mark "SIMANCO.*''
Needles in Containers marked
"FOR SINGER MACHINES"
are NOT SINGER made needles. 2
3
DESCRIPTION
SINGER Machines of Class 247, described in this book, are equir,r,ed
with a vertical trimrnPr and have threp neerlles, two loor,Prs and mechanism
for layinq a tor, covering thread. Each machine simultaneously trims the erl9n
of the fabric and r,roduces an erl9e coverin~J stitch with two needl0,s, one
loopnr and a thread laying linger and makes a reinforcing, independent
r,arollel line of two-thread chain stitching with the third needl0, and second
loor,er.
They each have boll beorinDs for the arm rotary shaft intermediote and
rear beorings, and on oilinD system which autornaticolly oils all r,rincir,ol
bearings.
The greatest distance between the outside needles is Vr inch, and machines
can be furnished in the following gouges:
Distance bPtween
overedgin~J
needles
1/s"
1/s"
1/s"
1/s"
1/i6"
1/i6"
1/i6"
¼"
¼"
Distonce between
single line of stitching and
overedging stitching
1/16"
1/s"
1/i6"
¼"
1/16"
1/s"
3/16"
1/16"
1/s"
Following are descriptions of the individual machines:
Machine 247-4 (drop feed) is equir,ped with gathering feed and is used
for seaming dresses, children's wear, trousers and similar work, and has a
needle bar stroke of l ½2 inches. Maximum stitch length is 8 stitches to the inch.
Machine 247-5 !drop feed) is used for seaming and welting auto seat
covers, upholstery, cushions, trousers, coats and similar work, and has a
needle bar stroke of 13/s inches. Maximum stitch lenS")th is 6 stitches to the inch.
Machine 247-6 is equipped with independent ur,per and under feeds
and with gathering feed, and is used for seaming children's dresses, children's
wear, trousers, bed sr,reads with inserted welt, and for similar work. Needle
bar stroke is l ½2 inches. Maximum stitch lenS")th is 8 stitches to the inch.
Machine 247-7 is equipr,ed with independent upper and under feeds and
is used for seaming and welting outo seat covers, ur,holstery, cushions,
trousers, coats and similar work. Needle bar stroke is l ¾ inches. Maximum
stitch length is 6 stitches to the inch.

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4
SETTING
UP
When
setting
up
the
machines, see
that
the
rubber
insulating
bushings
are
in
place
in the
four
holes
in
the
machine
bed.
Place the
felt
pads
over
the
four
studs in
the
corners
of
the base, then set the
machine
on
the base,
with
the studs
through
the
holes
in the
rubber
bushings.
CAUTION: After setting
up
the machine, do not
run
it
until
it
has
been
oiled
as
instructed below and
on
pages 5, 6 and
7.
SPEED
The maximum
speeds
recommended
for
these machines
are
as
follows:
Machines 2
47-4
and 2
47-6
.
.....
3800
rrvolutions
per
minute
Machines
247-5
and
247-7
.....
.
3600
rnvolutions
per
minute
CAUTION
--These machines
should
be
operated
at
moderate speeds
for
the first
few
days,
after
which
they can
be
operated
at
maximum speeds
depending
on
the nature
of
the work being sewn.
TO
OIL
THE
MACHINES
These machines
are
each
equipped
with
an
oiling
system
which
automatic-
ally
delivers
the
required
quantity
of
oil
to
all
principal
bearings.
A
connect-
ing
rod
scoop
takes
oil
from
the
reservoir
and
lubricates,
by
splash,
the
various
bearings
inside
the
machine
arm. Some
of
this
oil
is
distributed,
through
pipes
and
wicks,
to
the
principal
bearings
outside
the
machine
arm.
TO
INSURE OPERATION
OF
THIS
OILING
SYSTEM,
THE
FOLLOWING
INSTRUCTIONS MUST
BE
CAREFULLY
OBSERVED.
FAILURE
TO
DO
THIS
WILL
RESULT
IN SERIOUS
DAMAGE
TO
THE
MACHINE.
5
CAUTION-Use
"TYPE
B"
or "TYPE D" OIL
sold
only
by
Singer Sewing
Machine Company. For description
of
oils, see inside
of
front cover.
B
I
,~~~~=:::=~~ E
A
l50
I
I
~
Fig. 2. Priming
and
Oiling
Points
al
Rear Side
of
Machine
K
G
H
A
machine
new
from
the
factory,
or
one
which
has
been
idle
for
some
time,
must
be
oiled
as
instructed
next
below
and
on
pages
6
and
7.
NOTE
--It
is
not necessary to remove the work
plate
for the first or
subsequent oiling
of
the machine. For
this
purpose, open
out
hinged portion
of
the work
plate
at
the front side. The work
plate
is
removed
in
Figs.
2
and 3 for the purpose
of
illustration.
1st.
lift
up
and
turn
aside
the
cover
B,
Fig. 2,
and
apply
oil
to
the
filler
A,
Fig. 2,
until
the
oil
stands
at
the
mark
Y,
Fig. 3,
when
the
gauge
is
inserted
in
the
gauge
pipe
X, Fig. 3,
as
far
as
it
will
go.
The
oil
supply
must
be
main-
tained
at
this
level.
After
applying
oil
to
the
filler,
turn
the
cover
B
to
closed
position.
CAUTION-
This
cover
must
be
kept closed
at
all
times
except
when
oiling.

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6
2nd. Fill the oil holes or troughs at D, Land K, Fig. 2, and at R, T, U, V, Z
and A2, Fig. 3, to prime the wicks at these points.
Fig. 3. Priming and Oiling Poinh al Front Side al Machine
(Oil Gauge shown Removed)
3rd. Fill the oil holes or troughs at P, Q and F, Fig. 2.
4th. Fill the main oil pipe to overflowing through the oil hole W, Fig. 3.
5th. Apply oil to oil holes at C, N, E and G, Fig. 2, and at S, Fig. 3. These
two oil holes are not visible in thesA illustrations, but the arrows S will
indicate their location. They serve the looper avoiding motion eccentric
connection hinge pin. Also apply an occasional drop of oil at H, Fig. 2, on
the gathering feed control.
7
6th. Apply oil at D2, Fig. 4, for the needle bar connecting stud, also apply
a drop or two of oil at 82 and F2, Fig. 4, where the presser bar passes
Fig. 4. Face Plate removed to show Oiling Points
through its bushings, also at C2 and E2, Fig. 4, where the needle bar passes
through its bushings.
NOTE -After the machine has run at a moderate speed for about five
minutes, it should be stopped and allowed to stand idle for a few minutes.
The oil in the reservoir should then be checked and oil should be added,
when necessary, to bring it to the oil level mark Y, Fig. 3.
A machine in daily use must be oiled as follows:
1st. Apply oil to the oil filler A, Fig. 2, until the oil stands at the oil level
mark Y, Fig. 3, when the machine is at rest.
2nd. Fill
the oil cup D, Fig. 2, LEVEL FULL twice daily or as required.
3rd. Apply oil twice daily, or as required, to all oil holes.
4th. Remove the face plate and apply oil to the points shown in Fig. 4.
SPECIAL NOTICE
The letter O marked on the oil pipe coupling M, Fig. 2, must always be
at the top. This is to insure that the oil spoon, attached to the inner end of
the coupling, is open side up.

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8
NEEDLES
Needles
for
these machines
are
of
Class
and
Variety
62x53 in Sizes
12,
14,
16, 18,
21, 22,
and
23.
The size
of
the
needles
to
be
used
is
determined
by
the size
of
the
thread
which
must pass
freely
through
the
needle
eye.
Rough
or
uneven
thread,
or
thread
which
passes
with
difficulty
through
the
needle
eye,
will
interfere
with
correct
stitching.
Orders
for
needles
must
specify
the quantity
required,
the
size
number,
also
the
class
and
variety numbers
separated
by
the
letter
"X".
Following
is
an
example
of
an
intelligible
order:
"100
No.
21, 62 x 53
needles"
The best stitching results
will
be
obtained
with
needles
furnished
by
Singer
Sewing
Machine
Company.
TO
SET
THE
NEEDLES
Insert the
needles
as
far
as
they
will
go
up
into
the
needle
clamr,,
with
rhe
single
continuous
groove
of
each
needle
toward
the
front
side
of
the
machine
!toward
the
operator),
then
securely
tighten
the set
screw
for
each
needle.
SINGER
Needles
should
be
used
in
SINGER
Machines.
These
Needles
and
their
Containers
are marked
with
the
Company's
Trade Mark "SIMANCO.*''
Needles
in
Containers
marked
"FOR
SINGER
MACHINES"
are
NOT
SINGER
mode
needles.
2
9
TO
THREAD
THE
NEEDLES
AND
THE
THREAD
CARRYING
FINGER
See
Figs.
5, 6
and
7
Spool
A supplies the
thread
for
the
right-hand
needle.
Spool
B
is
for
the
center
needle.
Spool
C
is
for
the
left-hand
needle.
Spool
Dis
for
the
thread-
carrying
finger
G.
The
course
of
each
thread
is
shown
in
detail
in
Figs.
5, 6,
and
7.
Fig.
5.
Threading
the
Needles
and
Thread-Carrying
Finger
Spools
E
and
Fare
for
the
loopers.
See
instructions
on
pages
10
and
l l
for
threading
the
loopers.

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fig.
6.
Upper
Threading
of
Machine
fig.
7.
Threading
Needle,
and
Thread-Carrying
finger
NOTE-Draw
about
two
inches
of
thread
through
each
needle
eye
and
the
eye
of
the
Thread-Carrying
Finger
with
which
to
commence
sewing.
TO
THREAD
THE
LOOPERS
Spool
E,
Fig.
5,
is
for
the
rear
looper
K,
Fig.
9,
the
thread
for
which
is
passed
down
through
the
rear
hole
in
the
lifting
lever
W,
Fig.
8,
crnd
down
through
tension
N,
Fig.
8,
down
through
tlw
outside
hole
in th,,
upriqht
guide
P,
Fig. 8,
then
forward
lhrouoh
the
slot
Q,
Fig. 8,
in
th,!
work
plote,
then
forward
and
over
guide
R,
Fig.
9,
through
guide
S,
Fig.
9,
through
under
thread
take-up
stripper
T,
Fig.
9,
through
the
rear
slot
of
threod
separotor
U,
Fig.
9,
under
the
tension
V,
Fig.
9,
and
forward
through
the
rear
looper
K,
Fig.
9.
11
\¥-_fl:~,._'-~~'-~""•::·:·
E
r
\e
1
1
·11
.r
-----=--
·
_(}\"'•"c~
~Q
=1=1
ff9~18
fig.
8.
Threading
the
leapers-
Rear
Side
of
Machine
Spool
F,
Fig.
5,
is
for
the
front
looper
L,
Fig.
9,
the
thread
for
which
is
pa"ed
down
thrOU(Jh
the
front
hole
of
the
liftinq
lever
W,
Fig. 8,
down
through
tcmion
0,
Fig.
8,
ond
down
throuqh
th,"
inside
hole
of
11,,,
upriqlit
guide
P,
Fig. 8,
then
forward
through
the
slot
Q,
Fig. 8,
in
the
work
plate,
fig.
9.
Threading
the
leapers-front
Side
of
Machine
then
forward
through
the
guide
R,
Fig.
9,
and
over
the
quide
S,
Fig.
9,
through
under
thread
take-up
stripper
T,
Fig.
9,
through
the
front
hole
of
thread
separator
U,
Fig.
9,
over
the
tension
V,
Fig.
9,
through
wire
guide
W,
Fig.
9,
and
forward
through
the
front
looper
L,
Fig.
9.
Draw
about
two
inches
of
thread
through
the Pye
of
eoch
looper
with
which
lo
commence
scwi11q.
CAUTION~
Before commencing to sew, hold the covering
thread
D,
to
the
left
of
the presser
foot
and
toward
the
rear
side
of
the machine,
for
the first
few
stitches to insure that the
thread-laying
finger
M,
Fig.
7,
catches the covering
thread.

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12
TO
REGULATE
NEEDLE
THREAD
TENSIONS
See Fig. 10
Tensions
should
be
just
enough
to
set
the
stitches
properly
in
the
goods.
fig.
10. To
Regulate
Ne.-dle
Thread
Tension,
and
Tension on
Covering
Thread
Turn thumb nuts
J,
downward
to
increase
the
tensions
or
upward
to
decrease
the
tensions.
TO
REGULATE
TENSION
ON
THE
COVERING
THREAD
Tension
for
the
covering
thread
is
regulated
by
loosening
screw
H2,
Fig.
11,
and
setting
the
controller
J2,
Fig.
11,
forward
(toward
the
operator)
··i
~
-1
...
-
;!
J
J2
Fig.
11.
Ta Regulate Covering Thread
Tension
or
backward
!away
from
the
operator).
When
adjustment
is
completed,
tighten-
screw
H2.
This
adjustment
is
in
conjunction
with
tension
regulation
by
means
of
thumb
nut
G2,
Fig.
10.
Turn
this thumb nut
downward
for
increased
tension,
or
upward
for
less
tension
on
the
covering
thread.
13
TO
ADJUST
THREAD
SEPARATOR
After
loosening
screw
L2,
Fig.
10, the
thread
separator
K2,
Fig.
10,
is
orljustohlP
upward
or
downword
to
obtain
thP bPst
rPs11lts
with
various
kinds
and
thicknesses
of
thread.
Tighten
screw
L2
after
adjustment
has
been
completed.
TO
REGULATE
LOOPER
THREAD
TENSION
See Fig. 12
To
increase
the
tension
on
the
looper
threads,
turn
the
thumb
nuts
M2,
at
Fig.
12.
To
Regulate
Looper
Thread
Tension
and
To
Regulate
Pressure on
the
Material
the
rear
side
of
the
machine,
inward,
or
turn
these
thurnb nuts
outward
for
less
tension
on
the
looper
threads.
TO
REGULATE
THE
PRESSURE
ON
THE
MATERIAL
Turn
the
thumb
nut
N2,
Fig.
12,
downward
for
increased
pressure,
or
upward
for
less
pressure
on
the
material.

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14
TO
REGULATE
STITCH
LENGTH
See
Fig.
13
loosen
the
two
clamping
scrPws
02
in
the
fped
eccPntric
on
thP
rotary
shaft,
and,
to
increase
the
length
of
stitch,
furn the
regulating
screw
P2
Fig. 13.
To
Regulate Stitch
length
counter-clockwise
loutwordl,
or
furn the
r,'qulnfir1q
scre,v
P2
,l()ckwise
linwordl
to
shorten
stitch
lenqth,
then
securely
fiqhff'n
fh0
two
clamping
screws
02.
Then sef the
needle
guard
as
instructed
on
page
24.
TO
SET
THE
NEEDLE
THREAD
TAKE-UP
See Fig. 14
With
the
needle
bar
at
its
lowest
position,
the
needle
thread
fake-up
T2
is
normally
sef
about¼
inch
from
the
fop
of
the
needle
bar,
as
indicated
in
Fig. 14. This
selling
may
be
varied
to
suit
sewing
conditions.
r
o
adjust,
~
Q / /._-/._ I I
-~~~///.""'
~£~~?"£·-
=-Yr
0".1
-~
0
...----:
-:'."cecc-'
/4
~@It\
,-~
L_,
___
_
Fig. 14. Setting
Needle
Thread Take-up
and
Adjusting Auxiliary Thread Toke-up
loosen
clamp
screw
Q2
and
set the take-1Jp as
required,
makin~i
certain
that
it
parallels
the
face
plate
of
the
machine,
then
tighten
screw
02.
15
TO
ADJUST
AUXILIARY
THREAD
TAKE-UP
See Fig. 14
The
auxiliary
thread
take
up
S2
should
be
set
lo
fake
up
the
slock
of
the
needle
threads
after
the
looper
has shed
the
needle
loops
and
as
the
needle
bar
finishes its
downward
stroke
and
the
stitches
are
set.
To
change
the
position
of
the
auxiliary
thread
take-up,
loosen
screw
R2
and
raise
or
lower
the
auxiliary
thread
take-up
as
required,
then
tighten
screw
R2.
For
some
threads
it
will
be
necessary
to
set the
auxiliary
thread
take-up
at
a
height
different
from
that
required
by
others,
owing
to
the
differences
in
finish,
twist,
elasticity,
etc.
GATHERING
FEED
CONTROL
See Fig. 15
The
adjustable
gathering
feed
is
controlled
by
means
of
the
actuatinsi
1,,v,•r
V2
which
is
operated
by
either
foot
control
or
knee
control.
V2
Fig. 15.
Gathering
Feed
Control
The
extent
of
gathering
feed
action
is
limited
by
setting
the
stop
screw
U2.
The
gathering
feed
mechanism
can
be
locked
for
continuous
gafherirHJ.
hy
means
of
the
screw
W2.

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16
TO REMOVE AND REPLACE THE WORK PLATE
See Fig. 16
Turn the balance wheel to raise the needle bar to its highest position.
Remove the presser foot, throat plate and the needles.
Fig. 16. Removing the Work Plate
Remove the nut Y3 from the hinge screw stud Z3, at the back end of the
movable knife lever A4, and withdraw the hinge screw stud Z3. Next
remove the nut V3 from the upper end of the movable knife lever connection,
then remove the movable knife lever A4 with the knife holder and movable
knife F3, attached thereto.
Next remove the three screws which fasten the work plate to the mochine
and remove the work plate.
To replace the work plate, reverse the foregoing procedure, and adiust
the movable knife as instructed on poge 23.
f
l
r
l
INSTRUCTIONS
FOR
ADJUSTERS and MECHANICS

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SINGER
Needles
should
be
used
in
SINGER
Machines.
These
Needles and their
Contc1iners
are marked
with
the
Company's Trade Mark "SIMANCO. r"
Needles
in
Containers
marked
"FOR
SINGER
MACHINES"
are
NOT
SINGER
made
needles.
2
19
TO
SET
THE
REAR
(RIGHT HAND)
LOOPER
WITH
RELATION
TO
THE
RIGHT
HAND
NEEDLE
When
the
needle
bar
is
at
its
lowest
position
and
the
loopers
have
reached
their
farthest-back
position,
the
point
of
the
rear
(right-hand)
looper
K,
Fig.
17,
should
be
from
¾2
to
3/i6
inch
from
the
center
of
the
rilJht
hand
needle,
as
shown
in
Fig.
17.
Fig.
17. Setting Rear (right hand)
looper
with Relation
to
Right-Hand
Needle
Fig. 18
To
make
this
adjustment,
loosen
the
two
screws
A3, Fig. 18, in the
loor,er
carrier,
accessible
through
the
under
side
of
the
machine
bed,
and
rnnv,,
ti,,·
loorer
holder
bracket
os
required,
then
tighten
the
two
screws
A3;
ti""'
set
the
needle
bar
as
instructed
next
below.
TO
SET
THE
NEEDLE
BAR
AT
CORRECT
HEIGHT
l
urn
the
balonce
wheel
over
from
you
until
the
eye
of
the
rear
I
right
hond)
looper
K
reoches
the
center
of
the
middle
needle
os
shown
in
Fig.
20.
With
the
looper
in
this
position,
the
eye
of
the
middle
needle
ond
the
eye
of
the
reor
looper
should
be
in
perfect
olign-
rnent
when
possin,J
each
other
on
the
loop-toking
stroke
of
the
loopers,
os
shown
in
Fig.
20.
If the
eye
of
the
looper
ond
the
eye
of
the
middle
needle
are
not
in
perfect
alignment,
as
stated,
loosen
set
screw
B3,
Fig.
19, in
the
needle
bar
connecting
Fig. 19. Setting
Needle
B"lr
stud,
and
move
the
needle
bar
up
or
down
as
required,
then
securely
tighten
screw
B3.
Next
regulate
the
amount
of
needle-avoiding
motion
of
the
loopers
as
on
page
20.

From the library of Superior Sewing Machine & Supply LLC - www.supsew.com
20
TO REGULA TE THE AMOUNT OF NEEDLE-AVOIDING
MOTION OF THE LOOPERS
See Fig. 20
The extent of the sidewisP movement of the loopers is re~Julated by means
of the eccentric G3.
L u
22-t:::1,
'-c; \
Y2
E/9~87
K
X2
Fig. 20. To Regulate Needle Avoiding Motion of loopers
The needle-avoiding motion of the loopers should be so regulated that
the loopers will pass as close as possible to the needles but without actually
touching them.
To adjust, loosen the three set screws Y2, only two of which are visible in
Fig. 20, and turn the eccentric G3 until the required amount of needle-
avoiding motion has been obtained, then securely tighten the three set
screws Y2.
NOTE-- This adjustment will impart the required motion to the loopers,
but
it is also necessary to center this movement with regard to the needles,
by moving the looper holder inward or outward after loosening the screw
Z2. When the looper-avoiding motion has been correctly centered,
securely tighten screw Z2.
Next set the front looper with relation to the left hand needle, as instructed
next below.
TO SET THE FRONT (Left Hand) LOOPER WITH
RELATION TO THE LEFT HAND NEEDLE
See Fig. 20
With the rear looper and the needle bar properly set as instructed on
page 17, turn the balance wheel over from you until the eye of the front
looper L reaches the center of the left hand needle on the upward stroke of
the needle bar. The eye of this looper should then be in exact alignment with
the eye of the left hand needle as shown in Fig. 20. If this is not the case,
loosen the two screws X2, and move this looper forward or backward until
alignment i!i obtained, then securely tighten the two screws X2.
NOTE-The two screws X2 also provide a slight sidewise adjustment of
the left-hand looper. This sidewise adjustment of the left hand looper is
required to compensate for differences in various sizes of needles.
21
TO REGULATE HEIGHT OF PRESSER BAR LIFT
When the presser foot is raised to its highest position, the top of the
presser bar lifting bracket D3, Fig. 21, should be stopped against the lower
Fig. 21. To Regulate Height of Presser Bar lift
Fig. 22.
end of the presser bor hushin,J when the top surfoce of the pressr}r foot is
just below the threod-laying f,n!cler M, Fig. 22, to prevent the presser foot
from striking and rlamanging the thread-laying l,nger.
To adjust, loosen set screw C3, Fig. 21, and move the bracket uri or down
to produce the correct presser bar lift, then tighten set screw (3.
TO ADJUST THE THREAD TENSION RELEASER
See Fig. 23
The thread tension releaser must release tension on the needle threods
and the covering thread when the presser foot is raised.
~~ ll .\
H3i!c"/ -" ~ ~~~~2§-J3
0
I '1,, -
:I - .... ,,.
--- -------
[/9~79
Fig. 23. Adjust Thread Tension Releaser
In case the tension releaser does not properly release the threads, loosen
set screw J3 and turn the ,i,aft H3 over to the left until correct adjustment
is obtained, then securely tighten set screw J3.

From the library of Superior Sewing Machine & Supply LLC - www.supsew.com
22
TO
ADJUST
THE
LOOPER
THREAD
TAKE-UP
GUIDES
Fig.
24.
Adjust
looper
Thread
Take-Up
Guides
See Fig.
24
The
loopr;r
thrPrid
t"ke-up
quides
are
mJjust"hle
ta
produce
the best results
with
the kind
of
thread
fwing
usf'd
in the
loopers,
the
positions
of
th
0
se
(Juides
de-
pend1nq
upon
the
choractPr
of
the
threlld
b,;inq
used
Io
ml1ust
111111
1111'
"r,,ws
E3,
as
required.
TO
TIME
THE
FEED
See Fig. 25
Of
the
three
set
screws
K3
!only
two
of
which
are
shown)
in
the
feed
eccentric
L3,
the
first
two
must
be
tighterwd
against
the
two
flats
on
the
rotary
shaft. The first
screw
is
the
one
nearest
the
stitch
regu-
lator
screw
P2,
the
second
screw
being
the
one
which
follows
the first
when
the
bol-
once
wheel
is
turned
over
from
the
operator.
After
these
two
screws
ore
tightened
against
their
flats,
tighten
the
third
screw
against
the shaft.
K3
L3
, I
/ I
;;
~
E~~-~-~':"
,,9,,.5~-
Fig. 25. Timing the
Feed
23
TO REMOVE AND
REPLACE
THE
VERTICAL
TRIMMER
KNIVES
See Fig.
26
When
it
is
necessory
to
remove
the
knrves,
for
sharpening,
etc,
loosen
set
screw
W4
and
withdraw
the
stotionory
(lower)
knife
Y4
from
the
ma-
chine.
Loosen
the
hexagon
clamping
sc:rew
Z4
ond
withdraw
the
movable
lupperl
knife
F3
from
its
holder
A5. Reverse the
above
procedure
to
replace
these knives,
and
odjust
as
follows:
AS
Z4 _
-ci
D5
/
-V3
/~
----==-~--1i
,-~~--
i:;-
~,
~yf
..
:::t
'
_j_/JL_l?;:,.-~~~Z,.,-<i~-:::::=
Fig.
26.
To Remove,
Replace
and
Adjust
Vertical
Trimmer
Knives
TO
ADJUST
THE
VERTICAL
TRIMMER
KNIVES
See Fig.
26
The
Stationary
Knife
Y4
,hould
b,,
set
with
its
cuttinq
lbevelPdl
edqe
flush
with
the_
top
surfoce
of
the
throat.
Loosen
scr,3w
W4
ond
set
knife
Y4
up
or
down
to
the
required
position,
then
firmly
tighten
screw
W4.
Then
loosen
screw
X4
for
sidewise
adjustment
of
this knife.
It
should
be
set
against
(but
not
tightly
against)
the
right
hand
edge
of
the
lhroot
plate,
ofter
which
firmly
tighten
screw
X4.
The
Movable
Knife
F3
must
be
set so
that
its
cutting
lbeveledl
edgn
hm
fully
lopped
or
passed
the
cutting
edg0
of
the
stotionory
knife
Y4,
when
111,•
movable
knife
F3
has
completed
its
downward
stroke.
The
movable
knife
F3
can
be
set up
or
down
as
required,
after
loosening
hexagon
screw
Z4
which
must
be
firmly
tiqhtened
after
this ad1ustment. The
knife
F3
must
rub
or
bear
against
the
knife
Y4.
For
this
adjustment,
loosen
screw
B5
in
the
movable
knife
holder
ond
set
the
knife
F3
aqoinst
the
stotionory
knife
Y4
then
firmly
tighten
screw
B5.
CAUTION --Make
sure
that
the
guide
point
CS
on
the
cutting
edge
of
movable knife
F3
does
not
strike
the
two
screws
which
fasten
the
front
looper
to
the
looper holder.
This
would
occur
if
the
knife
F3
were
set
too low.

From the library of Superior Sewing Machine & Supply LLC - www.supsew.com
24
In
conjunction
with
the
above
adjustments
of
the
movable
knife
F3,
its
movement
must
be
regulated
to
insure
that
its
cutting
edge
lifts
high
enough
above
the
throat
plate
to
accommodate
the
material
beinq
sewn
To
adjust,
loosen
nut
V3
on
the
lever
connection
D5
and
move
lever
connection
D5
forward
!toward
the
operator!
for
less
lift,
or
move
it
backward
laway
from
the
operator)
for
more
lift
of
the
knife
F3.
The
connection
D5
is
adjustable
to
the limits
of
its
slot
in the
lever
A4.
IMPORTANT--
The
height, or lift,
of
knife
F3
should
be
not
greater
than
is
required for the material being sewn.
When
this
adjustment
is
completed,
firmly tighten
nut
V3.
TO
SET
THE
NEEDLE
GUARD
See
Fig.
27
The
function
of
the
needle
guard
Q4
is
to
prevent
the
needles
from
springing
into
the
path
of
the
loopers
when
the
loopers
ore
on
their
forward
stroke.
Fig.
27. Setting
the
Needle Guard
The
needle
guard
Q4
is
adjustable
up
or
down
and
forward
or
backward.
To
adjust
up
or
down,
loosen
screw
U4
and
set the
guard
at
the
required
height,
then
securely
tighten
screw
U4.
For
forward
or
backward
adjustment,
loosen
hexagon
screw
V4.
This
guard
should
be
set
as
close
os
possible
to
the
needles
but
without
actually
touching
them. Vv'hen this
adjustment
is
completed,
firmly
tighten
screw
V4.
NOTE-
These adjustments
must
be
made
whenever
stitch
length has
been changed,
as
instructed
on
page
14.
25
TO
SET
THE
FEED
DOG
AT
CORRECT HEIGHT
See
Fig.
28
When
the
feed
dog
is
at
its
highest
position,
practicol.ly
the
full
depth
of
the
feed
dog
teeth
should
project
through
the
slots
in the
throat
pint,,_
The
height
of
the
feed
dog
is
determined
by
the
stop
screw
N3,
which,
with
the
feed
dog
removed,
may
be turned
up
or
down
os
required.
The fec;d
dog
should
always
rest
upon
the
stop
screw
N3.
TO
SET
THE
FEED
DOG
AND
THE
GATHERING
FEED
WITH
RELATION
TO
THE
SLOTS IN
THE
THROAT
PLATE
See
Fig.
28
To
Centralize the Feed Dog and the
Gathering
Feed
in
the Throat
Plate Slots.
When
the
actuating
lever
V2
is
released,
the
gatherinq
feed
does
not
function
as a
separate
lgatheringl
feed,
but
moves
as a feedinCJ
K3
03
P3
~
V2
~
j3
-
)~1~
1~
r::-
1
•~
W3-~
-6 - -
.---
~
5-<
S3
~3
3 S3
El'f'f+l
Fig.
28.
Centralizing
and
Aligning
Feed
Dog
and
Gathering
Feed,
also
Setting
Feed
Dog
al
Correct
Height
unit
with
the
feed
dog.
The
feeding
action
of
the
feed
dog
and
the
gathering
feed
must
then
be
equi-distant
from
both
ends
of
the
slots.
loosen
clamping
screw
X3
and
turn
the
eccentric
hinge
pin
M3
until
the
feedinq
a,tion
is
centralized
as
aoove
stated,
then
securely
tighten
clamping
screw
X3.

From the library of Superior Sewing Machine & Supply LLC - www.supsew.com
26
In
addition
to
centralizing
the
feed
doq
and
gatherinq
fer?d,
together,
as
stated,
the
gathering
feed
must
be
centralized
Sf'porotely
!when
it
furictions
mo
gathering
feed)
between
the
feed
do~J
and
tlw
front
end
nf
the fp,,rJ dosJ
slots
in
the
throat
plate.
If od1ustment
is
necessary,
toke
out
the
two
screws
03,
only
on,,
,,f
winch
is
visible
in
Fig.
28-ond
remove
the
feed
regulotir1~1
bracket
and
I8v"r
V2.
loosen
the
two
clomping
screws
Q3
and
move
the
gathering
feed
regulator
P3
backward
or
forward
until
the
action
of
the swtl1Prinq fpprJ
is
cr;ntrol
betwPcn
the
feed
dos1
and
thP
end
of
the
fred
dO\i
slc,t,
olt,,r
which
s
0
curely
tiqhten
the
two
clomping
screws
Q3
ond
replace
th0 fc,ed reCJulotor
brcicket
and
lever
Y2,
moking
certain
that
the
tension
sprir,q
lnot
shown
in
Fig.
281
is
attached
to
the stud
at
the
inner
end
of
tlw
fePd
requlotinq
lcev0r Y2
oncJ
to
the
stucJ
in
the
machine
bed.
TO ALIGN
THE
FEED
DOG
AND GATHERING
FEED
IN
THE
THROAT
PLATE
SLOTS
See Fig.
28
If
adjustment
is
necessary,
loosen
the
three
screws
K3,
only
two
of
which
are
visible
in
Fig.
28;
remove
the
feed
regulating
bracket
and
lever
V2, as
instructed
obovP,
and
remove
the
siotherinq
fppd
rPqulotor
screw
stud
T3;
loosen
the
two
screws
U3
in
the
feed
rockinq
frome
Lc,osPn the
two
hushinq
set
screws
S3
and
move
the
two
bushings
to
ri~Jht
or
left
as re<7uire;d.
CAUTION-
These
two
bushings
for
the
shaft W 3
must
be
set
to
eliminote
unnecessary
end
play for
the
feed
rocking
frame,
but
should
not
be
set
close
enough
to
interfere
with
the
free
movement
of
the
feed
rocking
frame.
When
replocinsJ, make
certain
that
the
two
screws
U3 ensJoge the
nots
on the shaft
W3;
also,
when
connecting
the;
gatherinq
feed
crank
with
the
regulator
P3,
be
sure
to
hove
the
washer
R3
in
place
as
shown
in
this
illustra-
tion;
also
make
sure
that
the
tension
spring
connects
the
inner
end
of
the
regulating
lever
V2
to
the
machine
as
instructed
in
the
foregoing.
Also,
if
the
feed
eccentric
L3
was
disturbed
during
the
foregoing
adjustments, retirne as
instructed
on
page
22.
27
TO
ADJUST
THE
THREAD-CARRYING
FINGER
See
Figs.
29
and
30
The
rnuvernent
uf
the
thread-carrying
finger
holder
slide
block
C4,
Fig.
29,
111
the
slidewoy
of
the
bracket
84
should
be
equi-distont
from
both
Pnds
of
the
slidewoy.
This
will
provide
the
proper
movement
of
the
thread-corry,nq
frnger
G,
Fig.
30,
above
the
thread-laying
frnger
M
during
operation
Fig.
29.
Adjusting
Thread-Carrying
Finger
Fig.
30.
Adjusting
Thread-Carrying
Finger
and
Thread-laying
finger
To
obtain
this
setting,
loosen
clamping
screw
F4,
Fig.
30, in the
slide
block
crank
and
set, as instructecJ
above,
then
securely
tighten
clomping
screw
F4.
To
adjust
the
thread-carrying
frnger
G
for
height,
loosen
clarn1,i11s1
screw
G4,
Fig.
30.
Then
move
the thrPC1d-corrying
finger
up
or
down
too
pn51tio11
where
d
p,issr•s th,•
tl1rr•"d
f,,,,,ly,
hut
wrthnut
r,xt,u
cl,•c11<111c,•,
l1t•lw,.1•11 ti,,,
thread-laying
finger
M uncl the threod-corry1nS-l
fr11S-Jer
G. The
tlneod
crury111\J
finger
G
should
be
set
forward
(toward
the
operator)
or
backward
sc,
that
when
the
needle
bar
is
at
its
hiS-Jhest
position
the
covering
thread
will
have
passed
beneath
the poi11t
of
the
right
hand
ne
0
rlle.
Then
thp
threod
should
lead
from
the
eyelet
of
the
thread-carrying
finger,
directly
between
the
two
needles
to
the
threod-laying
finger.
When
these od1ustments
are
completed,
firmly
tighten
clamping
screw
G4.

From the library of Superior Sewing Machine & Supply LLC - www.supsew.com
28
TO ADJUST THE THREAD-LA YING FINGER
See Fig. 31
Whe11 the 11eedle bar is at its lowest rositio11, thr> point of the ur,pe1 prong
J4 of the thread-layi11g ft11ger M should be C1bout 1/16 inch fr,1111 the cr>ntrcr
of thr; m1ht hand 1weclle, C1S show11 i11 Fig. 31. rhe11 C1S thP thr•-od-layi11g
finger moves forward, the thread should be caught betwee11 the upper and
lower prongs of the thread-laying finger.
E/9'159
Fig. 31. Adjusting Thread-laying Finger
To adjust, loose11 the clampi11g screw E4, Fig. 30, and turn tlw tl11eod-luyi11~1
finger holder D4, Fig. 30, to bring the thread-laying ftm1er to the position
mentioned, the11 securely tighten clamr,i11~1 screw E4. fhe threod-layi11g f111~1er
is ad1ustable for height as well as for its positio11 1elutivr' to thP 1iccedl,,s 011
its forward and backward strokes. Loosen the two set screws H4, Fig. 30,
011d set the threod-loyiniJ f111ger up or down sn that it just r f,,ors the tmd,,,-
side of the threacl-carrying finger G, as 111ent1un,,d in the tl111d puroqruph of
page 27. On the upward stroke of the nc:,edl,, bar and the forwo1d str:ike of
the thread-laying finger M, the latter shoulcl puss os closr m possibl" without
touching the needles.
When these adjustments are completed, securely tighten the two set
screws H4.
29
TO TIME THE LOOPER THREAD TAKE-UP
See Figs. 32 and 33
The looper thread take-up K4 must contact the threads just as the loopers
are commencing their backward strokE!, or loop-shedding motion, as shown
El?4B8
Fig. 32. Timing Looper Thread Take-Up
in Fig. 32, and keep the threads taut until the points of the needles, on
their downward stroke, have entered the triangles formed by the looper
blades, the loorer threads and the needle loops, as shown in Fig. 33.
E/95"/o
Fig. 33. Timing looper Thread Take-Up
To adjust, loosen the set screw in the hub of the looper thread take-up K4
and set the take-up in correct position on the rotary shaft, then securely
tighten the set screw.

From the library of Superior Sewing Machine & Supply LLC - www.supsew.com
30
TO REMOVE THE FEED MECHANISM
See Fig. 34
Remove the presser foot and the throat plate. Rcrnovc the w,,rk plote as
instructed on pog8 16. Toke out the two screws 03, only one; of which is
visible in Fig. 34. Remove the feed regulator bracket ar1rl l,)v,,r V2.
. ,,
-" ~ --
,. ~ ~
Kl
-
03
· . P3
'
~~V2
nt'~
:cu''
ITT,) t:..-.-- /a~t
. ~ ~,.
"·4-:,_- ~;:,~
~ r,)
W3 . .-- _,... T3
1
~--- U3
~
Fig. 34. Removing Feed Mechanism
Toke out the feed regulator screw stud T3. loosen clornpinq screw X3
and withdraw the eccentric hinge screw M3. looser, th" lwo screws U3 hy
means of the regulator P3. Withdraw th,) shoft W3 from lhrc f"cRd rocking
frorne The feed mechanism can then be remov,,d from the mochine.
CAUTION When replacing, centralize the feed dog and gathering
feed in the slots in the throat plate, as instructed on pages 25 and 26.
Make sure that the two screws U3 engage the flats on the shaft W3. When
connecting the gathering feed link to the regulator P3, see that the small
washer
R3 is in place on the screw stud T3, as shown in Fig. 34 and that the
tension spring is attached to the stud at the inner end of the feed regulator
lever
V2 and to the stud in the machine bed.
31
TO REMOVE THE ARM ROCK SHAFT
Remove +he face plate ond the needles, anrl unscrew the needle clamp
from the needle bar. loosen clompinq screw B3, Fig. 37, and remove the
needle bar frorn the top of the machine. Remove the presser foot anrl pres""r
foot screw. Remove the od1usting screw N2, Fig. 35, from th,, press,,r hnr
sprin,J at the lop of the machine orn, lo release the presser bor sprins1-
loosen set screw C3, Fig. 37, and remove the
presser bar from the top of the machine. loosen set
screw N4, Fig. 37, and remove the pressPr bar
guide M4, Fig. 37, ond presser bar lifting brocket D3,
Fig. 37. Remove the needle bor connecting link K5,
Fig.
37, ond the foot lifting lever.
Fig. 36.
Remove set screw E5, Fig.
37, and remove cap screw
H5, Fig. 36, in the end of the
lug J5, Figs. 36 and 37, then
remove the slide block holder
shaft G5, Fig. 37, from the end
of the lug J5, then remove the
covering thrr,ad stud mechan-
ism F5, Fig. 37.
Remove cap P4, Fig. 38,
and screw and washer 04,
Fig. 38, at the rear end of the
rock shaft. Remove the round
cover plate at the rear side of Fig. 3B.
Fig. 35.
the machine, carefully saving the gasket. loosen the two screws T4, Fig. 38,
in the rock shaft crank and, with the connecting rod at midway position,
withdraw the rock shoft from the needle bar end of the machine

From the library of Superior Sewing Machine & Supply LLC - www.supsew.com
32
When
replacing
the
rock
shaft
have
the
connecting
rod
at
midway
position.
Replace
the
screw
and
washer
04
in
the end
of
the shaft. Turn the
balance
wheel
CJ
few
times
by
hand,
to
permit
the
rock
shnft
crunk
to
nlign
itself
before
ti\Jhtening the
two
screws
T4
on
their
flots. End
rloy
in
the
rock
shuft
is
regulated
by
loosening
set
screw
S4,
Fig.
38,
cmd
moving
the
bushing
R4
endwise.
NOTE---- Permit a little
end
play
in
the
rock
shaft,
when
cold,
to
allow for
the expansion
which
occurs
when
the
machine
is
warmed
up.
When
the
ports,
removed
as
above,
ore
replaced,
set the
needle
bar
os
instructed
on
page
19,
and
set
the
presser
bar
as
instructed
on
page
21.
SINGER
Needles
should
be
used
in
SINGER
Machines.
These
Needles and their Containers
are
marked with the
Company's Trade
Mark
"SIMANCO.*"
Needles
in
Containers
marked
"FOR
SINGER
MACHINES"
are
NOT
SING
ER
made
needles. 2