Singer 191D - User manual

SINGER
191 D

From the library of Superior Sewing Machine & Supply LLC - www.supsew.com
Service
Manual
SINGER*
191
D
Machine
THE
SINGER
COMPANY

From the library of Superior Sewing Machine & Supply LLC - www.supsew.com
CONTENTS
Description
of
~lachine
ADJUSTME:'-JTS
To
Set
Needle
Bar
at
Correct
Height
To
Set
Check
Spring
Height
To
Set
Check
Spring
Tension
To
Set
Presser
Bar
at
Correct
Height
To
Time
the
Se\•;ing Hook and
also
Set
the
Sewing
Hook
Sidewise
in
Relation
to
the
Needle
Feed
Reverse
Lever
Feed
Regulating
Dial
To
Time
the
Feed
To
Set
Feed
Dog
at
Correct
Height
RHlO\'AL
AND
REPLACE½ENT
OF
PRINCIPAL
ASSEMBLIES
To
Remove
the
Sev-;ing Hook
To
Replace
Oil
Filter
143.042
To
Replace
the
Sewing
Hook
To
Remove
and
Replace
the
Hook
Shaft
The
Oil
Pump
To
Remove and
Replace
the
Upright
Arm
To
Remove and
Replace
the
1',eedle Bar
To
Remove and
Replace
the
Presser
Bar
Needle
Thread
Take-up
To
Remove and
Replace
Needle
Bar
Wick
and
Needle
Bar
Connecting
To Remove
Oil
Wick
Holder
To
Install
New
Oil
Wick
Holder
The
Arm
Shaft
The
Bobbin
Winder
Shaft
Stud
Wick
• A
Trademark
of
THE
SINGER
COMPANY
Copyright
©
1980
THE
SINGER
COMPANY
All
Rights
ReserYed
Throughout
the
World
Page
1
2
2 - 3
3
4
5
6
6
7
8
9
10
10
11
12
13 -
14
14
15
15
-
17
18
18
18 -19
19 -
21
21
-22

From the library of Superior Sewing Machine & Supply LLC - www.supsew.com
TO
SET
NEEDLE
BAR
AT
CORRECT
HEIGHT
PREPARATION:
Remove
face
plate,
slide
plate
and
throat
plate.
See
that
needle
is
correctly
set
in
needle
bar.
TIMING
I
MARl-:-=:::C
Lower end
of
bushing
(1),
Fig.
2
must
be
set
as
shown
in
Fig.
2.
To
reset
bushing,
loosen
screw
(2).
CHECK:
When
needle
bar
is
at
its
lowest
point
(during
rotation
of
machine
pulley),
UPPER
TIMING
MARK
on
needle
bar
should
be
level
with
lower
end
of
bushing
(1).
Fig.
2
SETTING:
(
3)
(
1)
58.73
mm
-1910200A
66.01
mm
-1910300A
~~=:::::::;:r-Ll-
--- \
~T
~-HR_O_A_T_P_LATE
SEAT
0
Loosen
clamping
screw
(3),
Fig.
2.
Raise
or
lower
needle
bar
so
that
UPPER
TIMING
MARK
is
level
with
lower
end
of
bushing
(
1).
Then
securely
tighten
sere\\'
(
3)
.
Check
timing
of
sewing
hook
as
instructed
on
page
S.
Replace
throat
plate
and
slide
plate.
When
replacing
the
face
plate,
make
certain
that
the
screw
holes
in
the
face
plate
gasket
are
aligned
with
the
respective
screw
holes
in
the
face
plate;
avoiding
injury
to
the
gasket
and
consequent
oil
leakage.
TO
SET
CHECK
SPRING
HEIGHT
PREPARATION:
Thread
the
machine
and
place
a
lightweight
material
under
presser
foot.
CHECK:
Turn
machine
pulley
over
toward
operator
slowly.
When
take-up
lever
begins
to
rise,
check
spring
(4),
Fig.
3 makes a
slight
dip
and a
return
to
its
higher
position.
Later,
as
take-up
lever
approaches
top
of
stroke,
check
spring
(4)
should
be
drawn
all
the
way
down;
setting
the
stitch.
As
lever
descends,
check
spring
(4)
returns
to
rest.

From the library of Superior Sewing Machine & Supply LLC - www.supsew.com
SETTING:
Loosen screw (5), Fig. 3. Turn stud
(6), Fig. 3 (at the same time turning
entire tension assembly) either over toward
left to lower check spring and decrease
its movement, or over toward right to
raise check spring and increase its
movement. Securely tighten set screw (5).
~ ~
IIIGIIER
) O('
NOTE: Under certain conditions of
tacking, it may be necessary to set the
check spring higher than it is otherwise
normally set.
-~
( 5)
CAITTION: Check spring height setting
must be checked each time a different foot
is applied to machine.
( 6)
TO SET CHECK SPRING TENSIO~
PREPARATION:
Thread the machine. Securely tighten
set screw (5), Fig. 4. Make certain thumb nut
is on stud (6), Fig. 4.
CHECK:
Tension on check spring (4), Fig. 4,
should be sufficient to ensure action at top
speed; but still light enough to permit it-
self to be drawn all the way down (as take-
up lever approaches height of stroke) before
any thread is drawn through the tension
discs.
SETTING:
Using a large screwdriver in slot of
stud (6), turn stud either over toward left to
decrease tension or over to right to increase
it, as shown.
-
~!ORE ,
TENSION
~ ~
LESS
TENSION
Fig. 3
TIGHTEI';
\
)~
I \
( 5)
I
I
( 6)
Fig. 4
NOTE: The tension on the check spring may require different settings
depending upon the size of thread used. Heavier thread requires more tension
to ensure correct thread control.

From the library of Superior Sewing Machine & Supply LLC - www.supsew.com
(
9)
ll
I
(B)
I
I
II
I'
(7)
!
u
PREPARATION:
TO
SET
PRESSER
BAR
AT
CORRECT
HEIGHT
Fig.
S
FOOT
RESTING
FIRMLY
uror--
TIJROAT
PLATE
AT
HIGHEST
t
POINT
Remove
face
plate
and
slide
plate.
CHECK:
Fig.
6
LOWEST
INT\
CLEAR
1.
When
presser
foot
rests
firmly
upon
throat
plate
(with
feed
dog
below
throat
plate)
there
should
still
be
some
clearance
between
guide
bracket
(9),
Fig.
5
and
lifting
lever
link
(7),
as
shown
in
Fig.
S.
2.
When
presser
foot
is
at
its
highest
point
and
needle
bar
is
at
its
lowest,
top
of
presser
foot
should
clear
lower
end
of
needle
bar,
as
shown
in
Fig.
6.
SETTING:
Loosen
clamping
screw
(8),
Fig.
5.
Raise
or
lower
guide
bracket
(9),
as
required.
Securely
tighten
screw
(8).

From the library of Superior Sewing Machine & Supply LLC - www.supsew.com
TO
TIME
THE
SEWING
HOOK
AND
ALSO
SET
THE
SEWING
HOOK
SIDEWISE
IN
RELATION
TO
THE
NEEDLE
PREPARATION:
Remove
presser
foot,
slide
plate,
throat
plate
and
feed
dog.
CHECK:
When
lower
timing
mark on
needle
bar
is
level
with
lower
end
of
lower
needle
bar
bushing
(1),
the
point
of
the
sewing
hook
should
be
at
the
center
of
the
needle,
as
shown
in
Fig.
7.
Also,
when
point
of
sewing
hook
passes
needle,
clearance
between
hook
point
(10),
Fig.
8
and
needle
should
be
approximately
equal
to
thickness
of
a
piece
of
ordinary
notepaper
(about
.13
mm),
as
shown
in
Fig.
9.
NOTE:
Not
only
point
of
sewing
hook
but
entire
"FLAT"
of
hook
point
should
clear
scarf
on
needle
blade.
Normally,
a
.S
mm
clearance
is
provided
between
hub
of
hook
and
oil
retaining
·collar.
SETTING:
Loosen two
set
screws
(11),
Fig.
7
in
hub
of
hook.
Then
retighten
one
of
the
set
screws
very
lightly
so
that
the
sewing
hook
can
still
be
turned
on
the
shaft.
Hold
shaft
immovable
and
turn
hook
as
required
to
bring
point
of
hook
to
center
of
needle
as
shown
in
Fig.
7 and
at
the
same
time
adjust
clearance
between
needle
and
hook
point
as
shown
in
Fig.
9.
Tighten
set
screws
(11)
lightly,
turn
machine
pulley
to
make
certain
the
sewing
hook
is
correctly
set
in
relation
to
the
needle.
Then
securely
tighten
set
screws
(
11)
.
-5-
LOWER
TIMING
MARK
-----
HOOK
POIITT
AT
CENTER
OF
NEEDLE
Fig.
9
ON
UPWARD
STROKE
Fig.
7
Fig.
8

From the library of Superior Sewing Machine & Supply LLC - www.supsew.com
FEED
REVERSE
LEVER
Before
the
machine
leaves
the
factory,
the
spring
tension
of
the
feed
reverse
lever
is
set
at
an
appropriate
tension
for
easy
and
comfortable
sewing
operation.
If
it
is
necessary
to
adjust
the
feed
reverse
lever
spring
tension,
tip
machine
back
and
loosen
feed
reverse
lever
spring
retainer
screw
(13)
holding
the
sHring
retainer
(12)
on
the
machine
leg.
Move
spring
retainer
(12)
up
or
down,
as
required,
and
finnly
tighten
screh
(13).
The
lighter
the
tension,
the
easier
it
is
to
operate
the
feed
reverse
lever,
however
the
ten-
sion
should
be
set
a
little
heavier
for
maximum
stitch
length
and
high
speed
sewing.
Fig.
10
FEED
REGULATING
DIAL
Nonnally,
the
machine
is
adjusted
to
sew a
maximum
stitch
length
of
4.2
mm.
This
however,
can
be
changed
to
5
mm
(5
s.p.i.)
by
relocating
the
feed
regulating
dial
ser-
ration
plate
(14)
in
the
recess
on
the
reverse
side
of
the
feed
regulating
dial,
as
shown
in
Fig.
11.
When
feed
regulating
dial
serration
plate
(14)
has
been
relocated
in
the
recess
on
the
reverse
side
of
the
dial,
replace
dial
on
machine
and
turn
dial
until
feed
reverse
lever
becomes
immovable,
then
check
that
graduation
"0"
on
the
dial
is
in
12
o'clock
position.
If
adjustment
is
neces-
sary,
loosen
feed
regulating
dial
cap
screw
and
turn
dial
clockwise
or
counterclockwise,
as
required.
Securely
tighten
the
cap
screw.
CAUTION:
Make
sure
the
feed
dog
clears
the
front
and
rear
edges
of
the
throat
plate
slots
when maximum
stitch
length
is
changed
to
5
mm.
4.
2
mm
SETTING
191
S
mm
SETTING
~
..~'0
(
14)
Fig.
11

From the library of Superior Sewing Machine & Supply LLC - www.supsew.com
TO
TIME
THE
FEED
Before
the
machine
leaves
the
factory,
the
feed
and
feed
lifting
eccentric
is
set
for
average
sewing
conditions;
having
the
timing
mark (15)
(for
1910200A)
or
timing
mark
(16)
(for
191D300A)
align
on
the
timing
mark.(17)
provided
on
the
arm
shaft.
If
for
any
reason,
it
is
necessary
to
alter
the
timing
of
feed
and
feed
lifting
eccentric,
the
eccentric
should
be
adjusted
and
locked
in
desired
setting
with
set
screws
(18)
and
(19),
Fig.
12.
I
(17)
Fig.
12
NOTE:
When
making
above
adjustment,
push
the
eccentric
lightly
to
the
right
so
that
feed
rock
shaft
crank
connecting
rod
(20),
feed
connecting
link
(21),
feed
regulator
(22),
and
feed
regulator
hinge
stud
(23)
are
lightly
in
contact
with
each
respective
part
with
no
binding
or
excessive
play
between
the
parts.
(Fig.
13)
Fig.
13
-7-
(18)
(
15)
(
19)
( 2 3
J
(
22
J

From the library of Superior Sewing Machine & Supply LLC - www.supsew.com
TO
SET
FEED
DOG
AT
CORRECT
HEIGHT
ruLL
DEPTH
OF
TEETH
THROAT
PLATE
~~~--..---i
-
Fig.
14
When
the
feed
dog
is
at
its
highest
position,
approximately
the
full
depth
of
all
tfue
teeth
should
project
above
the
top
surface
of
the
throat
plate,
as
shown
in
Fig.
14.
Before
checking
the
height
of
the
feed
dog,
set
the
machine
for
the
longest
stitch.
To
adjust,
loosen
the
clamping
screv,
(24),
Fig.
15,
and
raise
or
lower
the
feed
dog
(which
is
fastened
to
the
feed
bar
(25),
Fig.
15)
as
required.
Then
securely
tighten
screw
(24).
-11
Fig.
15
If
it
is
found
necessary
to
adjust
the
feed
dog
height
due
to
the
material
being
sewn
and/or
exchanging
the
feed
dog and
throat
plate,
it
should
be
adjusted
in
the
manner
explained
above.
NOTE:
Feed
Dog
should
not
contact
edges
of
the
throat
plate
slots
during
its
movement
but
should
be
located
centrally
in
relation
to
the
front,
rear
and
sides
of
the
throat
plate
slots.
-8-