Singer 211U157 User manual

Service
Manual
SINGER*
INDUSTRIAL PRODUCTS
* A Trademark of THE SINGER COMPANY
Copyright©1981 THE SINGER COMPANY
All Rights Reserved Throughout the World
U141

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DESCRIPTION
INSTALLATION
LUBRICATION
CONTENTS
OPERATOR
INFORMATION
ADJUSTMENTS
Arm
Shaft
Connection
Belt Replacement
Bobbin
Case
Opener, AdJusting 17
15
INDEX
Installation
1
3
3-5
6-7
. 8 -
17
3
Bobbin
Case
Opener,
Timing.
Lubrication
.
3-
4
15
Needles.
Bobbin
Case,
Removal
From
Sewing
Hook
Bobbin
Removal .
Bobbin
Replacement
Bobbin
Thread Tension
Bobbin
Winding
Description
of
Machines.
Feed Dog
Adjustment
Feed
Eccentric
Adjustment
Feed Reversing Mechanism .
14
7
7
8
7
1-2
16
16
9
5
Needle Bar Height
11
Needle Bar Position Relative
to
Presser Bar
11
Needle Bar Rock Frame Removal
17
Needle Setting
5
Need
le
Thread Tension
8
Pressure
on
Material
9
Speed
5
Stitch
Length Regulation 9
Feed Reversing Mechanism
Adjustment
Hook
Height .
11
Take-up Lever Removal
.
17
Thread
Controller
.
Hook
Lubrication
.
Hook
Position Relative
to
Needle
Hook
Removal
Hook
Timing
.
12
4-5
13
14
13
Thread Tensions
Threading
Bobbin
Case
Threading
(Lower)
Threading
(Upper)
DESCRIPTION OF
MACHINES
High speed
two
needles, long
arm,
lock
stitch,
compound
feed, vertical axis
hook,
flat
becJ
machine,
for
corsets, overalls and
clothing
generally.
GENERAL
FEATURES
The
compound
feeding mechanism
which
consists
of
a
needle feed and
drop
feed, prevents
slipping
of
the
upper
and
lower
plies
of
material
when
being
stitched,
and assists
in
two
or
more plies being fed evenly
to
the
end
of
seam.
Vertical
axis
hook
with
metered
lubrication.
Hooks
can
be removed
without
disturbing
the
hook
shafts.
Adjustable
feed
driving
eccentric
located on
hook
driv-
ing shaft, produces a
uniform
stitch
length at all speeds.
Feed reversing mechanism,
controlled
by
hand
or
foot.
Arm
shaft,
hook
shaft, and
belt
driven
bed shaft are
mounted
in ball bearings at rear and in
automatically
lubri-
cated
plain
bearings at
front.
Plunger
for
changing length
of
stitch
is
on
top
surface
of
bed.
Sleeve
type
take-up.
Belt
drive.
Knee
lifter.
Federal
stitch
type
301.
8
8
7
7
6

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SPECIFICATIONS
Need
le
bar stroke
Take-up stroke .
Clearance under presser
foot
Maximum
stitch
length
Maximum
speed
..
Bed
length
..
Bed
width
...
Space
at right
of
needle
Need
le
..
Oil
...
1-5/16"
(33.34
mm)
. .
2.079"
(52.8
mm)
..
1
/4"
(6.35 mm)
..
6
SPI
(4.2 mm)
...
4,000
SPM
.
20-3/8"
(517.5
mm)
.
7"
(
177.8 mm)
.
9-5/8"
(244 5 mm)
. Cat. No. 1901
...
Type
"A''
or
"C"

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INSTALLATION
casten dric' can
to
tabie
with
its
right
edae in ',ne
with
r~
act-,ne
belt
slot
in tab1e Fasten knee
liher
brac"et
in
i
ocation
shown
in F
;g
1 Assemble
it
so
that
i
ifte
roo does
I,ot
strike
d<o
pan Screw slots in
bracket
orm-<:iE ,,ecessary
aoJ"str,em
Set
stoo-stud
to
stop
the
actior
of
knee
lifter
as
soor
as
oresser
foot
is
raised enough
tO
trio
har,o ,ever
LUBRICATION
For
the
lubrication
of
the machine, onl1
1
SINGER
OIL
'TYPE
A
or
C",
suppiied
by
THE
SINGER
COMPANY,
should be used, In
order
to
insure
proper
function
of
the
P'ic,chine and
to
prevent
any
excess wear
of
the
rnoving
parts and bearings,
the
r:1achine should be oiled regularly,
In
case
of
continuous
use,
it
shou
Id
be oiled even
more
o"ten
if
it
is
used
to
prodxe
long seams arid run
steadily.
Fill
r-1achine arr,, reservoir
to
high
mark
on oi! sight
gac1ge
as
indicated
in Fig
2,
The
machine
arm
reservoir
contains
an
oi;
vibrating
pump
which
releases
oil
only
when
the
machine
is
operat-
ing
Fig, 3 shows
the
oil
filler
hole
for
hook
saddle reservoirs.
Remove
oil
gauges
as
shown
in Fig. 3 and
fill
hook
saddle reservoirs
to
full
mark
on gauges.
To
lubricate
the
hook
gears and opener gears, a generous
supply
of
oil
should
be
applied
AT
LEAST
TWICE
DAILY
to
the
two
oil
holes.
4,6"(117mm)
EDGE
OF
CHECK TWICE
DAILY
OIL
GAUGE
(CHECK
TWICE
DAILY)
•-
--.MACHINE
CUT-OUT
Fig.
1
LIFTER
ROD
BEFORE
STARTING
MACHINE
FILL
TO
HIGH
MARK
I
Fig.
2
II
OIL
HOLE
(
FILL
RESERVOIR)
TO
HIGH
MARK
Fig.
3
HIGH

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Fig. 4
Fig. 5
~-
' '
~ '
~®·.u·
', i
,I /
r
''
"'''
CONTROL VALVE
SET SCREW
Fig. 4 shovvs the areas of the bed surface to where oil
should be applied.
Fig. 5 shows
the areas of bottom of the bed to where oi I
should be applied.
HOOK LUBRICATION
The bobbin case raceway is lubricated by 011 pumped
from the hook saddle reservoir while the machine is operat-
ing. The
amount of oil received by hook receway is very
important. To check this, first remove bobbin case. Then
with the machine running, hold a small piece of white paper
near the
hook for about 10 seconds. A distinct spray of oil
should be visible on the paper.
If there is no trace of oil or an excess of oil on the paper,
proceed
with the following steps.
1. Tip machine and loosen control valve set screw shewn
- 4 -

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2.
Turn
control
valve screw shown in Fig. 7 clockwise
for
more oil;
counterclockwise
for
less
oil. Re-tighten
control
valve
set
screw.
A short test run
of
at least a
m1I1ute
snould be made
between adjustments
to
insure
uniform
oil
flow.
After
each
adjustment
of
oil
control
valve screw,
oil
control
valve
set
screw should be securely tightened.
SPEED
Maximum
speed
for
machine 212U141
;s
4000
stitches
per
minute.
NEEDLES
For
machine
212U141,
use
Singer Needles, Catalog
1901.
Size
of
needle
for
a
particular
operation
is
determined
by
size
of
thread and
type
of
material
to
be sewn.
Orders
for
needles should state
quantity
required, size
number
and catalog number.
For example:
100
Needles, Size
14,
Catalog 1901
SETTING
THE
NEEDLES
Turn
the
machine
pulley
over
toward
you
until
the
needle bar moves up
to
its highest
point.
Loosen
the
set
screws in
the
needle
holder
and
put
the needles up
into
the
holder
as
far
as
they
will
go,
the
inside needle
or
the one nearest
the
upright
part
of
the
arm having its long
groove
toward
the
left,
and
the
outside
need
le
or
the one
farthest
from
the
upright
part
of
the
arm having its long
groove
toward
the
right,
the
eyes
of
both
needles being
directly
in line
with
the
arm
of
the
machine,
then
tighten
the
set screws.
TO
HIGHEST
POINT
5
CONTROL
VALVE
SCREW
Fig. 7
FACE
WITH
EACH
OTHER
Fig. 8

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HOLD
THIS
END
I
ROLL
OVER
, '
TOWARD,:~1/
--~,
/
/ /
·~--/~
--.
THREAD
It
is
recommended
that
left
twist
thread
be
used
:n
both
needles.
Either
left
or
right
twist
thread can be used in
bobbin.
To
determine
thread
twist,
hold
thread
as
shown in Fig.
9.
With
left
hand
holding
one end
of
thread,
twirl
other
end
with
thumb
and
forefinger
of
right
hand over
toward
you.
If
left
twist
thread, strands
will
wind
tighter.
If
right
twist
thread, strands
will
unwind
or
separate.
UPPER
THREADING
Turn
machine
pulley
over
toward
you
until
needle bar
is
at highest
position.
Pass
thread
through
threading
points
as
indicated in
Fig 10.
HIGHEST
POINT
\
Ci)
Threading Needle
Fig.
10
Draw
about
2 inches
of
thread
througn
needle eye
to
start sewing.
Threading Tension Assembly
- 6 -

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LOWER THREADING
BOBBIN REMOVAL
1. Open slide plates ir, bed of machine
2. Turn machine pulley over toward you until needle
bar reaches highest
position.
3 Raise bobbin latches a:1d lift out bobbins as indicated
ir Fig 11.
BOBBIN WINDING
Place bobbin on spindle as far as it will go.
Pass the thread from the thread unwinder through
threading points as shown in Fig. 12.
Wind end
of thread around the bobbin a few times.
Press latch against bobbir,, then start the machine.
The
bobbin winder will stor autor1atically when the
amount of thread for which it is regulated is wound upon
the bobbin. For more thread on bobbin, loosen screws and
swing latch away
from bobbin, for less thread on bobbin,
swing latch toward bobbin.
Tighten screws.
It the thread does not wind evenly, loosen lock nut and
turr tension bracket up or down, as required, then tighten
lo:::,: nut.
!3obbins can be wound while the machine is sewing.
TO REPLACE THE BOBBIN AND THREAD
THE BOBBIN CASES
The following instructions apply to both bobbin cases:
Hold the bobbin between the thumb and forefinger of
the right hand with the thread from the bobbin as shown in
Fig 13, place it on
the center stud of the bobbin case,
then push down the latch as shown. Draw the thread
into the slot 1 in the edge of the bobbin case and back of
the proJection 2, leaving a loose end of thread about two
inches long above the slide. When closing the slides, leave
Just enough space for the threads to pass through,
-7 -
Fig. 11
LOCK NUT
TENSION BRACKET
G
'-'
- ~
--"-._'
' ' ----..._ -----= lj
LATCH
~
Fig. 12
LATCH
LATCH
Fig. 13

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LESS
TENSION
Fig.
14
Fig.
15
A
TENSION
STUD
Fig.
16
- 8
THREAD
TENSIONS
Tension on thread shou
Id
be
as
Iight
as
possible
yet
sufficient
to
correctly
set
stitches
in material.
NEEDLE
THREAD
TENSION
Regulate needle thread
tension
only
when
presser
foot
is
down.
To
increase
tension,
turn
thumb
nut
shown in
Fig. 14, clockwise.
To
decrease tension
turn
thumb
nut
counterclockwise.
BOBBIN
THREAD
TENSION
Bobbin
thread tension
is
regulated
by
the screw nearest
to
the center
of
tension spring on the
outside
of
the
bobbin
case
shown in Fig. 15.
Turn
machine
pulley
slowly
until
screw
is
accessible.
To
increase tension,
turn
screw inward.
To
decrease
tension,
turn
screw
outward.
THREAD
CONTROLLER
The thread
controller
should
draw
up slack thread
before
needle
point
enters
fabric
to
prevent needle
from
penetrating :hread.
To
adjust thread
control
Ier, loosen set screw
A,
shown
in Fig. 16
Turn
thread
controller
spring stop
counterclock-
wise
for
rrore
controller
action
on thread
or
clockwise
for
less
action.
Tighten
set screw
A.
Thread
controller
action
TENSION
should be increased
fer
heavy :hread and
::Jecreased
for
light
thread.
To
adjust thread
controller
action
tension, loosen set
screw B shown in Fig. 16.
Turn
tension stud
slightly
coun-
terclockwise
for
more
tension
or
clockwise
for
less
tension.
Tighten
set
screw
B.

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STITCH
LENGTH
REGULATION
1.
With
rTachine
OFF,
depress
button
shown
in
Fig.
27 on bed surface.
NEVER
DEPRESS
BUTTON
WHEN
MACHINE
IS
ON.
2.
Turn
machine
pulley
over
toward
you
slowly
until
button
drops (snaps!
into
position.
PRESSURE ON
MATERIAL
0
ressure
of
presser
foot
on mater,ai should be
as
light
as
oossible
while
being
sufficient
to
insure correct feeding
Pressure
is
regulated
by
screw shown
in
Fig. 18 at rear
of
r:1a,h:nr arm.
Turn
screv\' dciwnward
to
increase pressure
or
upward
to
decrease pressure.
REVERSE FEED
MECHANISM
To
reverse
feed
direction
by
hand, push revers8 lever
completely
down
in
order
to
have
same
stitch
length
as
in
forward
stitching
position.
3.
Turn
machine
pulley
in
direction
(+)
when
a longer
stitch
is
desired
(less
SPI) and in
direction
(-)
when
a
shorter
stitch
is
desired (more SPI).
4. Release
button.
NEVER
START
MACHINE
UNTIL
BUTTON
IS
RE
LEASED.
Fig.
17
TURN
TO
ADJUST
REVERSE
LEVER
Fig.
19
- 9 -

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HOLE
IN
REVERSE
FEED
LEVER
Fig.
20
~
10
-
To reverse
the
feed
with
foot
treadle, the
foot
tread
le
chain should be connected
to
hole
in reverse feed lever
shown in Fig. 20.
Release hand lever
or
foot
treadle
only
when
you
wish
to
resume
forward
stitching.

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ADJUSTMENTS
SETTING NEEDLE BAR
211U157
\\rien needie bar is at lowest position of its cycle, the
ccrrect gauge distance from throat plate seat to needle
s:op, in needle bar is .991 inch (25.16 mm)
Needle bar is correctly set when, at the lowest position
of its cycle, the upper timing mark is Just visible at lower
edge of needle bar frame as shown in Fig. 21.
If needle bar is not correctly set, loosen needle bar
cor,necting stud clan,p screw
shown in Fig 21 and correct
needle bar position. Re-tighten needle bar connecting stud
:::;an·c screw.
DISTANCE OF NEEDLE BAR FROM PRESSER
BAR
The distance between needle bar and presser bar (after
regulating stitch length so that there is no feed movement)
should be 17/32" (1349 mm) as shown in Fig 21
!f the distance between need le bar and presser bar is
':"Ore or less than 551 inch (14.0 mm), first turn machine
:::u!ley over
toward you until needle bar is at highest posi-
;ion. Remove cover plate from front of machine arm.
Loosen needle bar
frame clamp screw shown in Fig. 22
,'Jove needle bar frame forward or backward to correct its
position. Re-tighten clam:i screw.
ADJUSTING FEED REVERSING MECHANISM
AdJust stitch length to 6 stitches per inch on the
21 2U 141 machine. Loosen screw A and adjust crank shown
in Fig 23 so that the above stitch length can be obtained.
When you depress the reversing lever, the eccentric head
of the bearing pin B should rest against the bearing block.
Loosen set screws C and turn bearing pin B until the stitch
length is the same in reverse feed as in forward feed. Tight-
en a 11 screws.
- 11 -
\j
Fig. 21
® r
r,_ID
\/
/
NEEDLE BAR FRAME
CLAMP SCREW
Fig. 22
C
Fig. 23
CLAMP
SCREW
UPPER TIMING
MARK

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Fig. 24
CLEARANCE .032" (0.8 mm)
Fig. 25
HOOK HEIGHT
ADJUSTING SCREW
HOOK HUB
SOCKET SCREWS
Fig. 26
ADJUSTMENT OF SEWING HOOK HEIGHT
When lower timing mark on needle bar is just visible at
lower end of needle bar frame on upward stroke of needle,
the hook should pass about .079 inch (2.0 mm) above
upper edge
of needle eye as shown in Fig. 24.
And the clearance between bobbin case stop finger and
throat plate should be .032 inch (0.8 mm), as shown in
Fig. 25.
TO ADJUST HEIGHT OF SEWING HOOK
To adjust height of sewing hook, first fasten throat plate
to bed of machine and place bobbin case stop finger in sew-
ing
position. Pass a .032 inch (0.8 mm) shim between
bobbin case stop finger and throat plate. If shim is too tight
or too loose, turn machine pulley over toward you so that
the hook hub socket screws shown in Fig. 26 are accessible
with a socket wrench. Loosen both screws and remove
cloth washer frorn bobb n case Turn hook until one
of the holes is in line witll hook height adjusting screw. To
raise hook, turn hook height adjusting screw downward.
To lower hook, turn hook height adjusting screw up. Re-
tighten socket screws and turn hook height adJusting screw
again
just enough to leave a light tension. Check sewing
hook timing.
- 12 -

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ADJUSTMENT
OF DISTANCE BETWEEN
SEWING
HOOK
AND
NEEDLE
To
prevent
hook
point
from
dividing
strands
of
thread,
it should
pass
as
near
to
the needle
as
possible
without
'titting
it.
Turn
machine
pulley
over
toward
you
until
sewing
hook
point
is
in
the
position
nearest
to
needle.
Tip
machine and
loosen
hook
saddle screws shown in Fig. 27.
Adjust
hook
without
hitting
it.
Retighten
hook
saddle screws.
BE
SURE
HOOK
DRIVING
GEAR
SHOWN IN
FIG.
27
IS
COR-
RECTLY
SET
WITH
RELATION
TO
FACE
OF
HOOK
SADDLE.
USE
.008
INCH
(0.2
mm)
SHIM.
NEEDLE
GUARD
The
function
of
the
:1ee'.Jle
guard shown in Fig.
46
is
to
prevent
hook
point
from
striking
needle,
if
needle
is
de-
flected
after
penetrating
material.
The needle guard
can
be
bent
with
a pair
of
pliers,
if
necessary,
but
care should
be
taken
to
prevent
guard
from
interfering
with
normal path
of
needle.
TIMING
THE
SEWING
HOOK
Set feed
driving
eccentric
to
eight stitches per inch
Rer:iove
throat
plate
and
turn
machine
pulley
over
toward
vo•~
until
lower
timing
mark
on needle bar
is
just visible at
lower
edge
of
needle bar
frame
on
upward
stroke
of
needle.
\1
.'ith
needle in
this
positior,,
sewing
hook
is
correctly
timed
if
hook
points
are
as
show:1 on Fig
29A.
CENTER
LINES
OF
NEEDLES
RIGHT
NEEDLE
HOOK
POINT
~HOOK
POINT
FRONT
OF
MACHINE
Fig. 29 A
If
sewing
hook
is
not
correctly
timed,
loosen socket
screws
shown
in
Fig.
29
and
turn
hook
to
proper
timing
position
as
specified above.
Tighten
socket screws.
-
13
-
HOOK
SADDLE
SCREW
HOOK
DRIVING
GEAR
Fig.
27
NEEDLE
GUARD
Fig.
28
V
SOCKET
SCREWS
Fig.
29

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/
BOBBIN
CASE
HOOK
GIB
SCREWS
HOOK
GIB
SOCKET
SCREWS
I
GASKET
Fig.
30
BALL
BEARING
RETAINER
SCREWS
-~~~---
---
r
'
~-
r,
j·
, -
L__jl
'',
~-)1
Jc
~I
HOOK
SHAFT
Fig.
31
V
E:_
\
,;1h_.-
_-~
:~
h./
0
/
~'
1 - '
GASKET
COVER
PLATE
SOCKET
SCREWS
COVER
PLATE
Fig.
32
REMOVING
BOBBIN CASE
FROM
SEWING
HOOK
Remove
hook
gib screws,
indicated
in Fig.
30,
from
sew-
ing
hook.
Lift
off
hook
gib and remove
bobbin
case.
REMOVING
SEWING
HOOK
FROM
MACHINE
Remove presser
foot,
throat
plate
and feed dog. Loosen
hook
hub socket screws
shown
in Fig. 30.
Lift
hook
off
end
of
shaft.
-
14
-
REMOVING
HOOK
SHAFT
To
remove
hook
shaft,
first
remove ball bearing
retainer
screws
directly
under
hook
shown
in Fig. 31.
Tip
machine
back and loosen
hook
shaft gear hub socket screws shown
in
Fig_
32.
Lih
out
shaft
from
top
end.
If
shaft does
not
lift
out
easily, loosen screws in cover plate
of
hook
saddle
Just enough, at
first,
to
permit
the
oil
to
drain
out.
Then
remove cover
plate
completely,
being careful
not
to damage
the gasket Tap the end
of
hook
shaft

From the library of Superior Sewing Machine & Supply LLC - www.supsew.com
TIMING BOBBIN CASE OPENER
Turn machine pulley over toward you until lower timing
r-,ark on need le bar is even with edge of need le bar frame
on
upward stroke of needle. VVhen needle bar is in this posi-
tion, reference mark A should line up with reference mark
S on hook saddle, as indicated in Fig_ 33. If opener shaft is
out of time, tip machine back and loosen socket screws
shown in
Fig_ 34. Return machine to upright position and
turn opener driving shaft with screw drive in cap screw
shown in Fig. 33.
Tighten socket screws in opener driving
gear hub.
ADJUSTING BOBBIN CASE OPENER
The bobbin case opener, shown in Fig. 35, should be
set
so that it turns the bobbin case enough to make a
sufficient opening for the free passage of thread between
throat plate and bobbin case.
- 15 -
\
==1: /\
B A ,2
I \
CAP SCREW
SOCKET SCREWS
BOBBIN CASE
STOP
BOBBIN CASE--""',/
OPENA
Fig. 33
6,
,----
--- :::::, -~
~-- c::---, \
I
SOCKET SCREWS
Fig. 34
e
Fig. 35

From the library of Superior Sewing Machine & Supply LLC - www.supsew.com
THROAT
PLATE
FEED
DOG
Fig.
36
PINCH
SCREWS
/\
I
~
I
)
-~
r-
-~_e
___
~
r-_
~
--
~
~==,
---~
= =
LOCKING
SCREW
ADJUSTING
SCREW
FORK
SCREW
Fig.
37
ECCENTRIC
ADJUSTING
DISC
COLLAR
DISC
SPRING
GIB
LOCKING
SCREW
Fig.
38
FEED
DOG
ADJUSTMENT
Before adjusting feed dog, regulate
stitch
length
for
longest
stitch.
If
feed dog
is
correctly
adjusted,
all teeth
should rise evenly and
completely
above
throat
plate
as
shown in Fig. 36.
If
adjustment
is
required,
first
remove
throat
plate, then
tip
machine back and
turn
machine
pulley
over
toward
you
unti
I feed dog
is
at its highest
position.
Loosen
fork
screw
shown in Fig. 37 and raise
or
lower
feed dog
to
correct
position.
Re-tighten
fork
screw.
Feed dog should be set
so
that
when
need
le
is
at lowest
position
of
cycle,
it
will
be
slightly
in
front
of
center
point
of
needle hole in feed dog.
If
needle
is
not
correctly
locc1terJ
in needle hole,
tip
machine back
to
loosen
pinch
screws
shown in Fig. 37 and adjust feed dog to
correct
position.
Prior
to
above adjGstment, check needle bar
to
presser bar
setting
FEED ECCENTRIC ADJUSTMENT
The feed eccentric
is
provided
with
a gib
which
can be
adJusted
to
take up unnecessary
play
between feed
er
centric
and eccentric
body.
To
adjust
gib,
first
loosen
two
locking
screws beside gib and
turn
in
two
adjusting screws
in gib
until
all
play
is
eliminated
and
eccentric
fits
snugly
into
slot
of
eccentric
body.
Securely
tighten
two
lock,n~
screws.
-
16
-
The feed driving
eccentric
adjusting
disc spring provides
pressure against feed
eccentric
cam
to
prevent
it
from
mov-
ing
out
of
oosition
while
the machine
is
operating. The disc
spring
collar
may be moved to
rignt
or
left
to
adjust spring
pressure.
Normally,
collar
is
set flush
with
hub
of
eccentric
body.

From the library of Superior Sewing Machine & Supply LLC - www.supsew.com
A
SET SCREW
B
PULLEY
SET
SCREWS
~~~~;~-=---=---=-~~~====~~~~~~~~\...-.;:;.,.-
"J'c--::-.--------"=====~~=~~=
~
GUARD
REMOVAL
OF TAKE-UP LEVER
TAKE-UP
LEVER
Remove
arm
top
cover and face plate. Loosen
take-up
lrver
hinge stud
set
screw
shown
in
Fig_
39. Remove take-
up lever hinge stud and
take-up
guard.
Lift
take-up
lever
out
through
slot A in
top
of
arm
shown
in Fig. 39.
REMOVAL
OF
NEEDLE
BAR ROCK FRAME
Remove face
plate
and
arm
top
cover. Loosen
take-up
lever hinge stud
set
screw
shown
in Fig. 39.
Extract
take-up
lever hinge
stud,
take-up
guard and
take-up
lever_
Remove
cover
from
front
of
machine
arm.
Loosen needle bar
frame
shaft
clamp
screw
shown
in
Fig_
40_
Pull needle
bar
rock
frame
with
its
shaft
from
machine.
REPLACEMENT OF
ARM
SHAFT
CONNECTION
BELT
Remove needle,
to
avoid damage,
before
proceeding
to
replace
belt.
Tip
machine
and slide
belt
off
lower
pulley
shown
in
Fig.
41.
Loosen
two
set screws in
machine
pulley
and remove
pulley
and ba
11
bearing_
Lift
belt
up and
draw
it
around
arm
shaft
through
space at B indicated in Fig. 39.
Replace
belt
through
ball bearing space
of
B.
After
placing
belt
over
arm
shaft
connection
belt
pulley,
replace
machine
pulley
with
ball
bearing.
To
remove all end
play
from
shaft,
tighten
set screws in
machine
pulley
and
(hold-
ing needle
bar
crank
in
place) tap
machine
pulley
into
posi-
tion
with
palm
of
hand.
Tighten
machine
pulley
set screws.
COVER
PLATE
Fig.
39
ARM
SHAFT
CONNECTION
BELT
PULLEY
Turn
machine
pulley
over
toward
you
until
thread take-
ur
levPr
is
at its !1ighest position_
Then
turn
hook
drivino
shaft
until
the
setting
mark
A on lever
pulley
is
in
line
with
setting
mark
B cut
into
machine
bed
as
shown
in Fig.
41. VVith
both
arm
shaft and
hook
driving
shaft in
position,
slip
belt
over
lower
pulley.
This
procedure
should
correctly
time
sewing hooh:
with
needle_ Check
timing
as
indicated
on page
13.
------1
.
•
,7
NEEDLE
BAR
FRAME
SHAFT
CLAMP
SCREW
SETTING
MARK
B
SETTING
MARK
A
ROCK
FRAME
Fig.
40
LOWER
PULLEY
Fig.
41
-
17
-

From the library of Superior Sewing Machine & Supply LLC - www.supsew.com
R9.6
INFORMATION
FOR REFERENCE PURPOSE
SKETCH OF SEWING
MACHINE
TABLE
81,0
R9.6
9,0
0
SINGER
REAR
SIDE
Unit
mm
C!
-
-
N
17.8
25.0
0
0
N
29.4
117.0
LOCATION
OF
KNEE
LIFTER
108,0
223.2
80.7
520.5
Fig. 42
-
18
-
J
I

From the library of Superior Sewing Machine & Supply LLC - www.supsew.com
Form
U-3240
(Rev.
182)
Part
No.
543245-002
(Rev.
1)
Printed
in
Japan