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

7

8

9

10

11

12

13 -

14

15

-

17

18

18 -19

19 -

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

(

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

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-

Singer 191D - User manual

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