Singer 246K43 Troubleshooting guide

SINGER
246K42, 246K43 AND 246K45

From the library of Superior Sewing Machine & Supply LLC - www.supsew.com
(961)
SERVICE
MANUAL
AND
PARTS
LIST
FOR
SINGER*
OVEREDGING MACHINES
246k42,
246k4
3
and
246k45
Machine
246K42
CAUTION-See
that
machine
reservoir
is
filled
with
oil,
as
instructed
on
page
6
before
using
machine.
Copyright
Under
International
Copyright
Union
THE
SINGER
MANUFACTURING
COMPANY
*A
Trademark
of
THE
SINGER
MANUFACTURING
COMPANY
Printed
in
Great
Britain

From the library of Superior Sewing Machine & Supply LLC - www.supsew.com
CONTENTS
DESCRIPTION
SETTING
UP
LUBRICATION
INFORMATION
FOR
OPERATOR
ADJUSTMENTS
PARTS
LIST
Page
3,4
5
6
6-13
14-25
27
Page
PARTS,
COMPLETE
FOR
246K42
MACHINE
...
31
PARTS
SPECIAL
TO
246
K43
MACH
IN
E
......
.40
PARTS
SPECIAL
TO
246K45
MACHINE
.......
43
FITTINGS
...............................................
.46
ACCESSORIES
..........................................
54
NUMERICAL
LIST
OF
PARTS
.....................
57
INDEX
Accessories
to
Machines
Angular
Adjustment,
Stationary
Knife
Bight
Adjustment
Page
3
24
23,24
•
Cleaning
6,
25
Clearance
between
Looper
Carrier
Connection
and
Guide
Bar
Bracket
20
Contact
Point
of
Knives
23
Curvature
of
Needle
Blade
7
Description
of
Oil
Inside
Front
Cover
Differential
Feed
14
Drop
Feed
14
Edge
Guide,
Swing
Out
14
Feed
Controls
14,
15
Feed Dogs,
Setting
16
Feed Dogs,.
Tilting
16
Feed Eccentrics,
Changing
15
Feed Eccentric
Extractor
l
64203
l 4
Feed Eccentrics, Sizes
Recommended
Foot
Lifter
Formation
of
Stitches
Gathering
Gauge
164460
Gauge
164592
Knife
Grinder
701-9
Knife
Sharpening
Knives,
Removal
and
Replacement
Left Looper,
Setting
Length
of
Stitch
Looper
Thread
Eyelet,
Setting
Looper
Thread
Stripper
Looper
Thread
Take-up,
Adjustments
Machine
Pulley
Movable
Knife
Needle
Clamp,
Setting
14
3, 5
4
15
16
to
21
16
to
21
25
25
23
19
14,
15
22
22
22
3,5,
25
23-25
17
2
Needle
Curvature
Gauge
164588
Needle
Guard
Needle,
Setting
Needles
Needles
and
Thread
Needle
Thread
Controller,
Setting
Oil
Flow
Adjustment
in
Looper
Mechanism
Preparation
for
Threading
Page
7
24
8
3, 7
7
l 8
6
8
13,
25
13
21
20,
21
Pressure
of
Presser Foot
Regulation
Right
Looper,
Installing
Right
Looper,
Setting
Running-in
Machine
Sharpening
Knives
Speed
Spreader,
Installing
Spreader,
Setting
Stationary
Knife
Stitch
Formation
Stitch
Length,
Regulating
Stitch Types
Stretching
Stripper
Suggestions
for
Efficient
Operation
Take-up,
Adjustments
Threading
Threading
Wire
164196
Thread
Tensions,
Regulating
Tools
Trimmer,
Adjustments
Unwinder
Width
of
Bight
X-ray
View
of
Machine
6
25
7
21
20,21
23-25
4
14,
15
3, 4,
10-12
l 5
22
25
22
9-12
3,10,12
13,
25
3
23,24
3, 9
23,
24
3

From the library of Superior Sewing Machine & Supply LLC - www.supsew.com
DESCRIPTION
Fig. 2.
X-ray
View
of Class
246K
Machine
(Lubricating System Shown in Solid Black)
Machines
246K42,
246K43
and
246K45
pro-
duce
high
speed
overedging
and
simultaneous
trimming
on
materials
ranging
from
lace
to
canvas.
Available
for
single needle
operations,
these
powerful
but
compact
machines
are
capable
of
producing
three
different
overedge
stitches.
Stitch
Types
503,
504
and
505.
Adaptable
for
gathering,
stretching
or
feeding
the
work
uniformly,
these
machines
of
C:lass
246K
have
proven
themselves
in
an
almost
endless
list
of
overedge
operations
including
serging,
inter-
mittent
gathering,
ruffling,
binding,
scalloping,
cuffing,
side-seaming,
yoking,
closing,
cording,
welting
and
inserting.
GENERAL CHARACTERISTICS
Curved needles:
Catalogue
#
1265
(151 x 7)
regular,
Catalogue#l263
(151 x 3)
tapered
blade.
Loopers (or
looper
and
spreader)
independently
driven,
permitting
variations
in
their
adjustment
in
relation
to
each
other
and
to
the
needle,
to
suit
the
work
required.
Either left or right twist of thread
may
be
used
in
needle
and
in
loopers.
Adjustable trimmer
cuts
cleanly;
operating
in
advance
of
needles.
Trimmings
guided
into
chip
chute
to
avoid
interference
with
work
and
with
mechanism.
Presser
foot
can
be
swung
toward
left
to
facili-
tate
threading
or
replacement
of
needle.
3
Tubular operation
is
accommodated
by
a
small
"horn"
extension
of
the
throat
plate
support.
Cloth plate
can
be
swung
to
the
left
for
con-
venience,
when
stitching
tubular
pieces
or
when
making
machine
adjustments.
Fittings for Machine
246K42
are
designed
to
retain
control
of
thread-chain
as
long
as
presser
foot
is
engaged
with
feed
dog,
enabling
operator
to
break
the
thread
chain
manually,
without
losing
control
of
chain
or
distorting
the
thread
loops.
Splash lubricating system,
shown
in Fig. 2,
automatically
and
continuously
oils
principal
bear-
ings
during
operation.
Oil cooling reservoir
in
rear
of
machine.
Oil level indicator
gauge
in
direct
view
of
operator.
Oils
recommended,
see
inside
front
cover.
Machine pulley
164231
for
3/8
inch
Y-belt;
also
used
for
5/16
inch
round
belt.
Machine pulley should
always
turn over
away
from operator
when
machine
is
in
motion.
ACCESSORIES
AND
TOOLS
Foot
lifter.
Knee
lifter
supplied
instead,
when
specified
on
order
..
Threading
wire
164196.
Tweezers
164204.
Socket wrench
164197
(for
needle
clamping
nut).
Flat, open-end wrench l
0875
(for
feed
eccentric
nut).
Screwdriver
85318.
Wrench
164831
(for
right
looper
carrier
guide
bar
oil
plug
screw
nut).
Thread unwinder
15103
l
(for
two-
or
three-
thread).
Thread unwinder
228705
(two-thread)
or
228706
(three-thread)
for
nylon
threads
will
be
supplied
instead
of
regular
unwinder,
upon
spe-
cific
order.

From the library of Superior Sewing Machine & Supply LLC - www.supsew.com
SPECIAL
FEATURES
.Machine
246K42
...
pants serging
...
light
and
medium
weight
fabrics
...
drop feed
...
one needle,
one
looper,
one
spreader
...
two-thread
serging
stitch
(Stitch Type
#503,
shown
in
Fig. 3).
See
page
12
for
instructions
on
threading
.
. . . trimmer
adjustable
to
cut
1/
16
inch
to
1/ 4
inch
from
needle
...
bight limit,
l /
16
inch
to
7
/32
inch
...
feed eccentric
164915,
bronze,
regularly
sup-
plied
for
5
stitches
to
the
inch.
...
maximum
speed
6000
stitches
per
minute
Machine
246K43
...
general overedging;
gathering,
stretching
or
uniform feeding
...
light
and
medium
weight
fabrics
...
differential feed
...
one needle,
two
loopers
...
three-thread tight needle
thread
stitch
(Stitch
Type
#504
shown
in Fig. 4).
See
pages l 0
and
11
for
instructions
on
threading.
...
machine
is
frequently
fitted
to
produce
the
three-thread
purl-on-the-edge
stitch
(Stitch
Type
#505
shown
in
Fig. 5), upon specific
order.
See
page
11
for
instructions
on
threading.
4
Fig. 3 Stitch
Formation
(Stitch
Type
#503)
El
7310
Fig.
4.
Stitch
Formation
(Stitch
Type
#504)
~==~
"r.:~==2'~a'===;;"."y--
" I
~·~~
.....:::..,..-~
~~d~~kl~~~~~
..._,-...::;
"'-./:::::;:::::;
c=:.::::
.....,::s::::s
EZ,'3!/
Fig. 5. Stitch
Formation
(Stitch
Type
#505)
...
trimmer
adjustable
to
cut
1/16
to
1/4
inch
from
needle
...
bight
limit,
1/
16
inch
to
7
/32
inch
...
two
feed eccentrics
164915,
bronze,
regularly
supplied
for
14
stitches
to
the
inch
...
maximum
speed,
6000
stitches
per
minute
Machine
246K45
Similar to
Machine
246K43,
except-
...
more
looper
stroke,
higher
feed
lift, higher
knife
stroke
...
adapted
for
medium
and
medium
-
heavy
weight
fabrics
...
trimmer
adjustable
to
cut
l
/8
to
l /
4 inch
from
needle
...
bight limit,
l
/8
inch
to
l
/4
inch
.
..
Maximum
speed
5500
stitches
per
minute

From the library of Superior Sewing Machine & Supply LLC - www.supsew.com
INSTALLATION OF
MACHINE
AND
BASE
ON
TABLE
#6
Drill
Hole
(¾
inch
Diameter)
BELT
GUARD
Flat
Head
to
Accommodate
Chain
for
Presser
1 inch
Wood
Screws
~
#.~~~!-,.~•i.!~~g
Lever
.v
#8
Round Head
¾
Inch
Wood Screws
#7
Flat Head
¾ Inch Wood Screws
Fig. 6.
Machine
Base on Table, Showing Position
and
Drill Sizes
of
Holes Required
for
Installation
Place
machine
and
base
on
table
top
with
belt
groove
of
machine
pulley
in
line
with
belt
groove
of
driving
pulley.
Spot
position
of
hole
behind
machine
base,
di-
rectly
below
chain
slot
on
presser
foot
lifting
lever.
Remove
machine
from
base.
Draw
outline
of
machine
base
in
position
on
top
of
table.
Drill
hole
spotted
earlier,
3/
4
inch in
diameter,
to
accommodate
chain.
Using
base
and
belt
guard
as
template,
spot
and
drill six
holes
in
table
for
wood
screws,
as
shown
in
Fig. 6.
Fasten
machine
base
and
belt
guard
to
table
with
the
six
wood
screws,
described
in Fig.
6.
Set
machine
on
rubber
cushions
at
four
corners
of
base.
FOOT
LIFTER:
As
the
stand
recommended
for
Class
246K
Machines
with
foot
lifter
includes
a
suitable
foot
lifter
treadle,
foot
lifter
chain
6439,
without
the
treadle,
will
be
sent
with
the
machine.
If,
however,
the
machine
is
fitted
to
a
stand
or
other
equipment
which
does
not
have
a
suitable
treadle,
orders
should
state
that
foot
lifter
treadle
4885
is
required
and
it will
also
be
supplied,
with-
out
extra
charge.
CAUTION
All of the oil
is
drained from the machine before it
is
shipped from the factory.
DO
NOT
START
THE
MACHINE
UNTIL
IT
HAS
BEEN
THOROUGHLY
LUBRICATED
AS
INSTRUCTED
ON
PAGE
6.
5

From the library of Superior Sewing Machine & Supply LLC - www.supsew.com
LUBRICATION
HS
~
f
as
Pour "TYPE A" or "TYPE C"
OIL into Oil Filler Cup
~
Keep
Oil in
~ght Gaug~at
,, FULL'' MARK
Check
-
~ Oil Level
~"-DAILY
BEFORE STARTING MACHINE
Fig. 7. Filling Oil Reservoir
Use "TYPE A" or "TYPE C" OIL, sold by
Singer Sewing Machine Company.
Apply this oil to oil filler cup on top of machine,
pouring oil into reservoir until oil in the sight
gauge is at "FULL" mark, as indicated in Fig. 7.
Check oil sight gauge daily before starting
machine
and oil machine, when necessary, as
instructed in Fig. 7 above.
WHEN A MACHINE HAS BEEN IDLE FOR A CON-
SIDERABLE TIME (OR AFTER A MAJOR INSTALLA-
TION OF PARTS}. Clean the machine thoroughly.
Then apply a few drops of oil to oil grooves of
feed bar connections QS (see inset at bottom left
of Fig. 7) and to looper carrier connection guide
bar at 02, Fig. 8 behind upper knife carrier and
chip guard. Apply a drop of oil to presser bar at
HS, Fig. 7. Check oil level in reservoir, as instructed
in Fig. 7.
AFTER MACHINE IS INSTALLED AND BEFORE
STARTING THE MACHINE:
Remove the chip guard from the front of the
machine.
6
Fig. 8. Oil Flow Adjustment
Check the oil flow on right hand looper carrier
connection guide bar at 02, Fig. 8.
To adjust amount of oil flow on guide bar
at 02, loosen lock nut DS and turn adjusting screw
LS, Fig. 8 clockwise as far as possible. Oil flow is
now shut off, completely.
Back off screw LS (turning screw anti-clockwise)
l /2 turn. Check lubrication again.
To increase oil flow, turn screw LS anti-clock-
wise a small amount and recheck lubrication.
If oil flow is too great turn screw LS clockwise
about 1/4 turn and recheck.
Never operate machine when oil flow is SHUT
OFF
at LS.
When correct oil flow is obtained, lock the nut
DS, Fig. 8. Replace the chip guard.
Remove belt and check freeness of machine by
turning machine pulley by hand. Replace belt.
Finally, "run-in" the machine for approximately
15 minutes at a moderate speed.

From the library of Superior Sewing Machine & Supply LLC - www.supsew.com
SPEED
MAXIMUM
SPEEDt Speed
recommended
(Stitches
per
for
Long Runs
or
while
MACHINE
minute)
sewing
long stitches
246K42 6000 5500
246K43 6000 5500
246K45 5500 5000
tMaximum
efficient
speed
is
dependent
upon
the
ability
of
the
operator,
the
nature
of
the
operation
and
the
type
of
material
being
sewn.
It
is
advisable
to
operate
these
machines
at
more
moderate
speeds
the
first
few
days,
after
which
they
can
be
run
at
top
speed.
When
the
machine
is
in
operation,
top
of
ma-
chine
pulley
must
always
turn
over
away
from
operator.
NEEDLES
AND
THREAD
Needles
are
of
curved
blade,
Catalogue
#1265
(151
x
7)
regular,
in
sizes
9
to
12, 14,
16,
18,
19
and
21.
Needles
of
Catalogue#l263
(151
x
3)
with
tapered
blade,
in
sizes
5, 6, 7, 9
and
11
are
available.
Selection of needles
can
make
a
great
differ-
ence
in
the
ease
and
quality
of
the
work.
It
is
im-
portant
that
each
needle
be
just
right
for
machine,
thread
and
work
being
done.
Choose your needle carefully.
The
correct
size
will
permit
~hread
to
pass
freely
through
needle
eye;
avoiding
strain
and
breakage
of
thread.
Either
right
twist
or
left
twist
thread
may
be
used.
If
trouble occurs during sewing:
Inspect
needle
point.
A
hook
or
burr
may
cause
poor
stitching
or
some
materials
may
be
cut
when
short
stitches
are
used.
Check curvature
of
each
needle,
as
instructed
below.
Unless
the
needle
has
the
correct
curva-
ture,
it
may
cause
skipping
of
stitches.
Orders
for
needles
must
specify
the
Quantity
required,
the
Size
number,
also
the
Catalogue
number
...
For
example
...
"100Size9,
Catalogue-#=1265(151 x
7)
Needles."
The
best
stitching
results
will
be
obtained
when
using
needles
sold
by
Singer
Sewing
Machine
Company.
CURVATURE
OF
NEEDLE
BLADE
(Gauge
164588,
for
needles
of
Sizes
7
to 16
only)
E2282..
Fig. 9. Checking
Needle
Curvature
7
Before
making
any
stitching adjustments,
the
curvature
of
each
needle
blade
should
be
checked
in
the
following
manner:
Using
Gauge
164588,
shown
in
Fig.
9,
insert
shank
of
needle,
with
its
flat
side up,
in
the
groove
A.
Push
the
needle along
the
groove
as
far
as
it
will
go
against
stop
B.
Tighten
clamping
screw
C.
Swing
the
indicator
D,
slowly
to
and
fro,
along
the
curve
of
the
needle
blade,
observing
the
dis-
tance
between
the
needle
blade
and
the
tip
of
the
indicator.
The
tip
of
the
indicator
should
just
make
con-
tact
at
the
needle
eye
and
should
clear
needle
blade,
at
upper
end
of
curve,
by
approximately
.005
to
.006
inch. Use
feeler
gauge.
Reject
any
needle
that
cannot pass this test.

From the library of Superior Sewing Machine & Supply LLC - www.supsew.com
SETTING THE NEEDLE
Move needle clamp up to its highest position.
Insert needle, as instructed in Steps 1 to 5 in
Fig. 10.
When needle is correctly inserted in needle
clamp, securely tighten needle clamping nut. (See
Step 6, Fig. 10.)
1. Move to Highest Point
2. Raise 4.
Loosen with
Lever Socket Wrench
i 11164197
3. Swing ~ ./ / 5. lnse_rt Needle,
towo,d LEFT ~ // ./ against Stop
'NEEDLE4~
6. Tighten Nut
Fig. 10. Needle Correctly Set in Needle Clamp
PREPARATION FOR THREADING
For convenience in threading ...
. . . Machine 246K42: Swing edge guide out of
position, as instructed in Step 1, Fig. 11 .
. . . All Machines: ... Raise bench stand flap
and open front cover plate.
... Swing cloth plate toward left.
... Release presser bar as instructed in Step 5,
Fig. 11 and swing presser bar tow a rd left.
8
~\
4. Swing
Cloth Plate
toward LEFT
1. Swing Guide
toward Right
(246K42l
~3.Pull
~,this Cover open
~ 2.Raise
_.,,~this Bench Stand Flap
Fig. 11. Preparation for Threading

From the library of Superior Sewing Machine & Supply LLC - www.supsew.com
TO
THREAD
UNWINDER
Select
the
unwinder
suitable
for
the
type
of
stitch
and
work
to
be
accomplished
.
LOOPER
THREAt
i
NEEDLE
i
CREAD
...
.
.
..
,
RIGHT
/
I I
LOOPE~
! I
THREAD
: :
: :
. .
. .
. .
. .
•
•
• •
•
•
• •
<$~
~
~·
\ • ·- I
\\
l
i
i
i
LEFT
;
LOOPER
~
THREAD
.
.
.
.
.
.
\
\
.
\
...•.•
NEEDLE
THREAD
£27458
Fig. 12.
Unwinder
151031
Threaded
for
Two-Thread
Stitch Fig. 13.
Unwinder
151031
Threaded
for
Three-Thread
Stitch
USE
THREADING
WIRE
rl
►)
LEFT
,
LOOPER
\THREAD-._.
RIGHT
\
~~~~~_;\
~
··
..
NEEDLE
THREAD
Fig. 14.
Unwinder
228706
(for
Nylon
Thread)
Threaded
for
Three-Thread
Stitch
9

From the library of Superior Sewing Machine & Supply LLC - www.supsew.com
TO
THREAD
THE
MACHINE
FOR
THREE-THREAD
TIGHT
NEEDLE
THREAD
STITCH
(TYPE
#504)
(Regular
for
Machines
246K43
and
246K45)
RIGHT
LOOPER
THREAD----..._\
•
NEEDLE
\
THREAD
\
EYELET
:•
•
,◄
NEEDLE
\ THREAD
~l
·~===\:
~:
•
•
•
•
•
•
••
..
·····
......
•••••••••
~
'
•
..
..
•
.
.
.
.
•
t,
/
/t.-.V
....
USE
THREADING WIRE 164196
HERE
Fig. 15. Threading the
Machine
(Three-thread Tight Stitch)
Machine
should
be
equipped
with
needle
thread
controller
164151,
Fig. 33,
page
18,
looper
thread
take-up
164175
and
looper
thread
stripper-
and-take-up
164091,
shown
in Fig. 19.
Pass
each
thread
through
threading
points
as
shown
in
Figs.
15,
16
and
19.
IMPORTANT:
Thread
the
needle
thread
(double line)
com-
pletely
first.
Thread
right
looper
thread
(dotted line)
com-
pletely
next.
Thread
the
left
looper
thread
(solid line) last.
Use
threading
wire
164196,
shown
in
Fig. 17,
to
pass
threads
through
threading
tubes,
at
points
THREAD
10
Fig. 16. Threading
Needle
Thread
Eyelet (Tight Stitch)
Fig. 17.
Threading
Wire
164196
indicated
in
Fig. 15.
Draw
four
or
more
inches
of
thread
through
eyelet
in
threading
wire
and
pass
threaded
wire
through
required
threading
tube.
NEEDLE
THREAD:
Before
passing
needle
thread
(see
double line)
through
its
threading
tube,
turn
machine
pulley
over
toward
you
until
needle
is
at
its lowest position.
Observe
the
co.rrect
position
and
method
of
threading
needle
thread
eyelet
as
shown
,n
Fig. 16.
After
threading
needle
thread
eyelet,
raise
needle
to
its
highest
position
and
pass
the
thread
from
front
to
rear
through
needle eye.
When
threading
needle,
double
back
the
end
of
the
thread
and
twist
it;
making
thread
stiff
enough
to
thread
the
needle
eye
easily.

From the library of Superior Sewing Machine & Supply LLC - www.supsew.com
TO THREAD
THE
MACHINE
FOR THREE-THREAD
TIGHT
NEEDLE THREAD STITCH
(CONTINUED)
,,,
\
Remove this
Thread
Before
Threading
Fig. 18. Right
looper
Fig. 19.
Threading
looper
Take-up
(Three-thread
Tight Stitch)
J
LOOPER
THREADS:
Before
threading
left
looper,
turn
machine
pulley
over
from
you
until
the
eye
.of left looper
is
directly
in
line
with
the
threading
tube
underneath
throat
plate.
Pass
each
looper
thread
through
its
threading
points,
·as
shown
in Figs. 15
and
19.
When threading right looper, be sure that there
is
no
loose
loop of thread
on
end of looper
(see
Fig. 18)
to
cause thread breakage.
Draw
about
twp
inches
of
thread
through
needle
eye
and
through
each
looper
eye,
with
which
to
start
sewing.
TO THREAD
THE
MACHINE
FOR THREE-THREAD PURL-ON-THE-EDGE STITCH (TYPE
#505)
Fig. 20. Threading
Needle
Thread
Eyelet (Purl Stitch)
164857
\;
t
i
-164288
Fig.
21.
Threading
looper
Take-up
(Purl-on-the-Edge
Stitch)
l l
Machine
should
be
equipped
with
left
and
right loopers,
with
needle
thread
controller
164381,
Fig. 34, page 18,
and
with
take-up
parts
164857
and
164288,
shown
in Fig.
21.
Needle
thread
eyelet,
shown
in Fig.
20,
may
be
raised
or
lowered,
as
required.
To
change
position
of
eyelet,
loosen
screw
RS,
Fig.
20,
move
eyelet
to
desired
position
and
securely
retighten
screw
RS.
The_
machine
is
threaded
for
three-thread
purl-
on-the-edge
stitch in
the
same
manner
as
for
three-
thread
tight
stitch
(see
Fig. 15
and
instructions
on
page 10)
with
the
following
exceptions:
The
needle
thread
eyelet
must
be
threaded
as
shown
in
Fig.
20.
The
looper
thread
take-up
must
be
threaded
as
shown
in
Fig.
21.

From the library of Superior Sewing Machine & Supply LLC - www.supsew.com
TO THREAD
THE
MACHINE
FOR
TWO
THREAD STITCH
(TYPES
__
#502
AND
#503)
(Stitch Type
#503,
Regular
for
Machine
246K42)
USE
THREADING WIRE
164196
HERE
NEEDLE
THREAD
EYELET
\J
~NEEDLE
·\
.•
·_
THREAD
THREAD
7
USE
'
THREADING WIRE
164196
HERE
Fig. 22. Threading the Machine
(Two-Thread Stitch)
Machine
should
be
equipped
with
needle
thread
controller
164381,
Fig.
34,
page 18,
and
with
looper
thread
take-up
164175
and
looper
thread
stripper-and-take-up
164091,
shown
in
Fig. 25.
Needle
thread
eyt!let,
shown
in
Fig.
23,
may
be
raised
or
lowered,
as
required.
To
change
the
position
of
the
eyelet,
loosen
screw
RS,
Fig.
23,
move
eyelet
to
desired
position
and
securely
re-
tighten
screw
RS.
To
thread
the
machine,
pass
each
thread
through
threading
points
in
the
order
shown
in
Figs.
22,
23
and
25. Double
line
indicates
needle
thread.
Solid
line
indicates
looper
thread.
Use
threading
wire
164196,
shown
in
Fig.
24,
to
pass
threads
through
threading
tubes,
at
points
indicated
in
Fig. 22.
Draw
four
or
more
inches
of
thread
through
eyelet
in
threading
wire
and
pass
threaded
wire
through
required
threading
tube.
12
Fig. 23. Threading Needle
Thread Eyelet
Fig. 24. Threading
Wire
164196
164
\_
5 //
1
LOOPER
~~
y
THREAD
/
,F
164091
Fig. 25. Threading Looper Take-up
NEEDLE
THREAD:
Before
passing
needle
thread
through
its
threading
tube,
turn
machine
pulley
over
away
from
you
until
needle
is
at
its
lowest
position.
Note
method
of
threading
needle
thread
eyelet
as
shown
in
Fig. 23.
After
threading
needle
thread
eyelet,
raise
needle
to
its
highest
position
and
pass
thread
from
front
to
rear
through
needle
eye.
LOOPER
THREAD:
Before
threading
looper
turn
machine
pulley
over
from
you
until
eye of looper
is
directly
in
line with threading tube
underneath
throat
plate.
Pass
looper
thread
through
threading
points,
as
shown
in
Figs.
22
and
25.
Draw
about
two
inches
of
thread
through
needle
eye
and
through
looper
eye,
with
which
to
start
sewing.

From the library of Superior Sewing Machine & Supply LLC - www.supsew.com
REGULATION
NEEDLE
THREAD
MORE
TENSION
~MORE
PRESSURE
~
\\
-
..111
LESS
PRESSURE
~
•
•
•
•
•
•
•
•
•
\
•
•
•
e
LESS
TENSION
\
LOOPER
•
~
~THREADS
~~
MORE
~
~TENSION
~
LESS
MO~ENSION
WJTENSION
~
LESS
TENSION
Fig.
26.
Regulating
Tension
of
Threads
and
Pressure
of
Presser
Foot
on
Material
THREAD
TENSIONS
Tension
on
needle
thread
should
be
just
suffi-
cient
to
set
stitch
correctly.
(See
Figs. 3
to
5
on
page
4 for
correct
stitch
formation.)
For
average
sewing,
tension
on
looper
thread
should
be
very
light.
Regulate
thread
tensions
as
instructed
in
Fig.
26.
PRESSURE
OF
PRESSER
FOOT
Correct
pressure
of
presser
foot
helps
feed
the
work
properly.
Always
use
lightest
pressure
possible.
Regulate
the
pressure
of
the
presser
foot
on
the
material
as
instructed
in Fig.
26.
NOTE:
The
instructions
on
the
following
pages
are
for
Service
Representatives.
To
insure
proper
timing
and
avoid
unnecessary
repetition,
these
instructions
should
be
followed
in
the
order
given.
13

From the library of Superior Sewing Machine & Supply LLC - www.supsew.com
EDGE
GUIDE
(SWING-OUT)
MACHINE
246K42
Edge guide (swing-out)
must
be
adjusted
to
conform
to
existing
width
of
bight.
Loosen
two
screws
U, Fig.
27
and
move
the
guide
V
toward
left
at
end
of
guide
arm
to
suit
narrower
bight
or
toward
right
for
wider
bight.
Securely
tighten
both
screws
U.
FEED
CONTROLS
DROP
FEED
(Regular
on
Machine
246K42)
con-
sists
of
a
lower
feed
mechanism
that
moves
above
and
below
the
throat
plate.
It
is
designed
to
carry
the
material
evenly
toward
the
needle
be-
fore
stitching
and
away
from
the
needle
after
it
is
stitched.
Stitch
length
can
be
controlled
as
in-
structed
at
right
and
on
page
15.
DIFFERENTIAL
FEED
(Regular
on
Machines
246K43
and
246K45)
consists
of
two
feed
dogs
Rand
T,
Fig.
29,
page
15,
independently
actuated
by
two
feed
eccentrics.
The
inner
feed
eccentric
(which
is
placed
on
the
shaft
first)
controls
the
movement
of
the
front
feed
dog
T.
The
outer
feed
eccentric
(which
is
placed
on
the
shaft
last)
con-
trols
the
movement
of
the
rear
feed
dog
R.
FEED
ECCENTRIC CHART:
V
Fig.
27.
Edge
Guide
on
Machine
246K12
TO CONTROL LENGTH OF STITCH
The
length
of
stitch is
determined
by
the
feed
eccentrics
in
use.
Each
feed eccentric
is
marked
with
the
number
of
stitches
it
makes,
as
shown
at
F,
Figs.
28
and
29.
Feed
Eccentrics
164915,
bronze,
can
be
sup-
plied
to
make
4
to
16,
18,
20,
22,
24,
28,
32,
36,
40, 45,
50,
60, 70,
80
and
l
00
stitches
to
the
inch.
Unless
otherwise
ordered
feed
eccentrics
will
be
supplied
according
to
chart
at
bottom
of
this
page.
To
feed the
work
evenly
(on
Machines
246K43
and
246K45)-use
two
feed
eccentrics
marked
for
the
same
stitch
length.
ECCENTRICS REGULARLY
FURNISHED
TYPE
OF
FEED
MACHINE
Quantity
Stitches
to
the
inch
246K42
one
5
Drop
246K43
and
246K45
two
14
Differential
14

From the library of Superior Sewing Machine & Supply LLC - www.supsew.com
TO
CONTROL LENGTH OF
STITCH
(CONTINUED)
Q
j
Fig.
28.
Feed Eccentric
Extractor
164203
and
Eccentric
164915,
bronze
To
gather
...for front
feed
dog
use
feed
eccentric
that
is
marked
for
longer
stitch
length
than
that
used
for
rear
feed
dog.
Place
eccentric
that
is
marked
for
longer
stitch
length
on
shaft
first.
To
stretch the
material
while
sewing...for front
feed
dog
use
feed
eccentric
that
is
marked
for
a
shorter
stitch
length
than
that
used
for
rear
feed
dog.
Place
eccentric
marked
for
shorter
stitch
length
on
shaft
first.
REMOVING
FEED
ECCENTRICS:
Swing
cloth
plate
Q,
presser
bar
and
feed
ec-
centric
cover
S,
Fig.
29
out
to
the
left.
Using
Wrench
l
0875,
remove
the
hexagon
head
nut
and
washer
from
the
shaft
M,
Fig.
29.
Screw
feed
eccentric
extractor
J,
Fig.
28
into
threaded
hole
E
of
outer
eccentric
H.
15
E M G
H
R T
J I
~
F
Fig.
29.
Changing
Length
of
Stitch
Machine
246K42:
Since
only
one
eccentric
1s
required
on
these
machines,
the
outer
roller
1s
NOT
AN
ECCENTRIC
but
merely
a
spacer-listed
as
feed
bar
guide
roller
164277.
The
inner
roller
164915
is
the
only
eccentric.
It
alone
determines
the
stitch
length
on
these
machines.
All
Machines:
Pull
gently
with
extractor
J
to
remove
outer
roller
or
eccentric
H.
Inner
eccentric
can
then
be
removed
in
the
same
manner.
INSTALLING
FEED
ECCENTRICS:
When
replacing
each
feed
eccentric,
be
sure
that
the
stamped
number
is
on
outside
face
of
eccentric,
as
shown
at
F,
Fig.
29.
The
keyway
on
the
eccentric
should
flt
over
key
at
G
on
shaft
M, Fig.
29.
Line
up
front
and
back
feed
bars
and
install
eccentrics.
When
the
feed
eccentrics
are
in
position,
replace
the
washer
and
hexagon
head
nut
and
screw
and
the
hexagon
head
nut
securely
on
the
shaft
M.

From the library of Superior Sewing Machine & Supply LLC - www.supsew.com
TO
SET
THE
FEED
DOGS
AT
THE
CORRECT
HEIGHT
Using
Gauge
164592
for
Machines
246K42
and
246K43
and
Gauge
164460
for
Machine
246K45
(See Fig.
30)
82
C2
J2
t:
~U2
-'M-"'"
_J...
~
F2
A2
K2 0
L2
H2
s
G2 E29Z3fJ
Fig.
30.
Setting
the
Feed Dog
CHECKING HEIGHT OF
FEED
DOGS:
Swing
the
presser
foot
A2
out
to
the
left,
and
turn
the
machine
pulley
over
from
you
until
the
feed
dogs
are
at
their
highest
position.
Place
the
gauge
J2,
over
the
front
feed
dog,
as
shown
in
Fig.
30.
Gauge
J2, Fig.
30
must
rest
firmly
upon
the
throat
plate
U2.
At
this
setting,
front
feed
dog
should
just
touch
the
bottom
face
F2
of
the
gauge.
Set
rear
feed
dog
at
the
same
height
as
the
front
feed
dog.
ADJUSTMENT:
Swing
the
cloth
plate
Q
and
the
feed
eccentric
cover
S
out
to
the
left.
Loosen
the
adjusting
screw
G2
and
raise
or
lower
the
front
feed
dog
C2,
as
required.
Then
tighten
screw
G2.
Loosen
the
adjusting
screw
H2
and
raise
or
lower
the
rear
feed
dog
B2,
as
required.
Then
tighten
screw
H2.
16
Machine
246K42
has
only
one
feed
dog
which
may
be
adjusted
after
swinging
edge
guide
V, Fig.
27,
page
14
out
toward
the
right
and
loosening
screw
G2,
Fig.
30.
TO
TILT
THE
FEED
See Fig.
30
When
it
is
desired
to
tilt
the
feed,
first
set
it
at
the
correct
height
as
described
above.
Then
loosen
the
hinge
pin
set
screw
K2
at
the
rear
of
the
machine
just
½ turn.
To tilt
the
feed
up
in
the rear
and
down
in the
front
of
the
needle,
slowly
turn
the
hinge
pin
L2
over
toward
the rear
of
the
machine,
until
the
desired
amount
of
tilt
is
obtained.
To
tilt
the
feed
down
in
the rear
and
up
in
the
front
of
the
needle,
slowly
turn
the
hinge
pin
L2
over
toward
the front
of
the
machine
until
the
desired
amount
of
tilt
is
obtained.
Then
tighten
the
screw
K2.

From the library of Superior Sewing Machine & Supply LLC - www.supsew.com
TO
SET
THE
NEEDLE
CLAMP
AT
THE
CORRECT
HEIGHT
Using
Gauge
164592
for
Machines
246K42
end
246K43
and
Gauge
164460
for
Machine
246K45
Fig.
31.
Checking
the
Needle
Clamp
Height
\
\
T2
P2
y
Fig.
32.
Adjusting
the
Needle
Clamp
£27579
(See Figs.
31
and
32)
17
CHECKING
HEIGHT
OF
NEEDLE CLAMP:
Turn
the
machine
pulley
over
from
you
until
the
needle
clamp
R2
reaches
its
highest
position.
Swing
the
presser
foot
and
cloth
plate
out
to
the
left.
Remove
the
needle
and
the
throat
plate.
On
Machine
246K42:
Swing
edge
guide
out
to
right.
(See
page
14.)
On
All
Machines:
Turn
the
machine
pulley
over
From
you
until
the
needle
clamp
R2
reaches
its
lowest
position.
Slip
the
"LOW"
end
of
the
gauge
J2
between
the
needle
clamp
and
the
throat
plate
seat
V2,
as
shown
in
Fig.
31.
At
this
setting,
the
needle
clamp
R2
should
just
touch
the
top
surface
02
on
the
"LOW"
end
of
the
gauge
J2.
ALTERNATE CHECK:
In
the
absence
of
a
gauge,
the
distance
between
bottom
of
needle
clamp
and
top
surface
of
throat
plate
seat,
on
all
varieties
of
machines,
should
be
set
at
.406
inch.
ADJUSTMENT:
Remove
the
top
frame
cover
and
loosen
the
clamping
screw
T2
and
the
two
screws
P2
and
Y,
Fig.
32.
Raise
or
lower
the
needle
clamp
R2, Fig.
31,
as
required.
To
secure
the
needle
clamp
in
the
correct
posi-
tion,
first
securely
tighten
the
screw
T2,
then
tighten
the
two
screws
P2
and
Y.

From the library of Superior Sewing Machine & Supply LLC - www.supsew.com
TO
SET
THE
NEEDLE
THREAD
CONTROLLER
(See Figs.
33
and
34)
Need
le
Thread
Controller
164151
(J3, Fig.
33)
is
used
for
three-thread TIGHT stitch.
Needle
Thread
Controller
164381
(J3, Fig.
34)
1s
used
for
two-thread
stitch
and
for
purl-on-the-
edge
stitch.
FUNCTION:
The
needle
thread
controller
J3
should
aid
in
the
setting
of
the
stitch
by
taking up the slack of
needle thread
as
the
needle
finishes
its
downward
stroke;
thus
setting
the
stitch
as
the
needle
thread
loop
is
shed
from
the
loopers.
When
needle
is
at
its
highest
position,
needle
thread
should
run
under
clearance
U3
of
needle
thread
controller
J3,
shown
in
Fig.
33
or
in
fork
U3
of
controller
J3,
shown
in
Fig.
34.
VARIATIONS:
The
desired
setting
for
needle
thread
controller
may
vary
with
changes
in
thread,
spe-
cial
fittings
or
materials
in
use.
ADJUSTMENT:
Swing
presser
bar
A2
and
cloth
plate
Q
out
to
the
left.
Remove
screws
XS
and
oil
splash
guard
ZS.
Turn
machine
pulley
over
away
from
operator
until
needle
is
at
its
highest
position.
Loosen
two
screws
V3
and
move
needle
thread
controller
J3
toward
the front to tighten the
stitch
or
toward
the rear to loosen the stitch,
as
required.
Then
tighten
the
two
screws
V3
and
recheck
the
stitch
setting.
18
ZS
Fig.
33.
Needle
Thread
Controller
164151
in
Correct Relation
to
Needle
Thread
XS
V3
Fig.
34.
Needle
Thread
Controller
164381
in
Correct
Relation
to
Needle
Thread
G4
U3
J3
E305U2
Figs.
33
and
34
show
the
correct
position
of
the
needle
thread
as
it
passes
the
needle
thread
con-
troller
J3.
To,
check
this
condition,
remove
two
screws
L3
and
presser
bar
housing
G4.
After
making
certain
that
needle
thread
is
in
the
correct
position,
replace
presser
bar
housing
G4
and
fasten
with
two
screws
L3.
Replace
splash
guard
ZS
with
two
screws
XS.

From the library of Superior Sewing Machine & Supply LLC - www.supsew.com
TO SET THE LEFT LOOPER IN RELATION TO THE NEEDLE
Using Gauge 164592 on Machines 246K42 and 246K43
and Gauge 164460 on Machine 246K45
(See Figs. 35 and 36)
Z2
. ~
~~-~
'
CJ
D2
E2
A3 /tt-w2
);It:),/ BJ
""" ) ~--- S2
Fig. 35. Left Looper Assembly
Fig.
36. Settings
Machine 246K42 is regularly fitted with ONLY
one looper (the "left" looper).
19
PREPARATION:
Check the needle with needle gauge 164588,
as instructed on page 7.
Set the needle in the machine as instructed on
page 8.
Remove throat plate and chip guard.
Loosen set screw D2, Fig. 35 in left looper
holder C3.
Set left looper Z2 all the way down into its
holder.
Securely tighten set screw D2.
CHECKING
LEFT TO RIGHT POSITION:
Place gauge J2 on throat plate seat V2 as
shown in Fig. 36.
Turn machine pulley over away from you until
needle clamp R2 reaches its lowest position and
then rises sufficiently to permit "HIGH" end of
gauge J2 (.422 inch) to pass between needle
clamp R2 and throat plate seat, as shown in
Fig. 36.
When needle clamp R2 just contacts top surface
U4 of gauge, the tip of left looper Z2 should be
between centre
and left side of needle.
SETTING
LEFT TO RIGHT POSITION:
Loosen screw S2, Fig. 35. (This screw may not
be present on some machines.)
To move left looper Z2 toward right, loosen
A3 and carefully tighten screw B3 an equal
amount, as required.
To move left looper Z2 toward right, loosen
screw B3 and carefully tighten screw A3 an equal
amount, as required.
Recheck setting. When correct setting is ob-
tained securely tighten clamping screw S2.
CHECKING FRONT TO
REAR POSITION:
Turn machine pulley so that loopers move
through one complete sewing cycle. Observe
looper movement.
The left looper must rub lightly on the needle
as it passes toward the right.
SETTING FRONT TO REAR POSITION:
Turn machine pulley over away from you until
point of looper Z2 just reaches needle.
Loosen screw E2 just enough to allow movement
of looper holder C3.
Loosen set screw W2.
Move looper holder C3 toward rear of machine.
Turn set screw W2 inward until proper relation
between left looper and needle is obtained.
Securely tighten screw E2.
Replace throat plate and chip guard.