Singer 591 Service Manual

SINGER

591

Service

Manual

CONTENTS

Page

DESCRIPTIONOFMACHINE

ADJUSTMENTS

To Set

Needle

Barat Correct Height 2

To Set

Check

Spring

Height

2 —3

To Set CheckSpringTension 3

To Set PresserBarat Correct Height 4

To Time the SewingHook and also Set the SewingHook Sidewise in Relation to the Needle 5

Feed

To

Reverse

Time

the

Lever

Feed

To Set Feed Dogat Correct Height 7

Needle

REMOVAL

To remove
To Replace Oil Filter

To Replace

BarFrame

AND

the

Sewing

the

Sewing

Driving

REPLACEMENT

Linkage

Hook

143042

Hook

Adjustments 22 —23

OF

PRINCIPAL

ASSEMBLIES

To Remove and Replace the Hook Shaft 10

The Oil Pump 11

To Remove and Replace the Upright Arm Shaft 12 —13

To Remove

and

Replace

the

Needle Bar 13

To Remove and Replace the Presser Bar 14
Needle Thread Take-up . . . 14 —16
To Remove and Replace Arm Side Shield Wick, Needle Bar Wickand Needle Bar Connecting

Stud

To

To

The

Wick on

Remove

Install

Arm

Shaft

Oil Wick

New

Oil

Drop

Feed Machines 16

Holder

Wick

Holder

17—18

18

The Bobbin Winder 22

1

6

6

8
9

9

17

—21

SERVICE

Needle

INSTRUCTIONS

BarFrame

Driving

FOR

Linkage

COMPOUND

FEED

SYSTEM

Adjustments 23

To Remove and Replace Arm Side Shield Wick,Needle Bar Wickand Needle Bar Connecting

Stud

Wick
To
To

Remove
Remove

on Compound Feed
and
and

Replace
Replace

Needle
Compound

Machines

BarFrame

Feed

★

A

Trademark

Copyright

All

Rights

Assembly

Connecting

of

©

1981

Reserved

and

Needle

Bar 25

Rod 25

THE

SINGER

THE

SINGER

Throughout

COMPANY

COMPANY

the

World

24

Class

with

drop

mended

591

feed

for

Machines

in'D'

general

are

varieties,

stitching

high

speed,

compound

operations

SINGER

DESCRIPTION

rotary

hook,

fully

automatic

feed

in'C

varieties

ona

rangeoflighttoheavyweight

^9^

and

lubricated

hand

operated

long

fabrics.

arm

reverse

flat

bed

feeding

lockstitch

machines

mechanism.

Recom

GENERAL

Federal stitch type 301,

Balanced

Pendantlinkfeedwith feed

Dialtype stitch regulator on feed

Improvedthread take-upleverguard.
Fully automatic lubricatingsystem.

Adjustable

Kneelifter mechanism isintegral with the machinebaseand oil reservoir.

Arm

The

Needle

Oearance under presser foot:

(Maximum liftofpresserfoot when raisedwith

knee lifter —12.7mm)

Maximum stitch length:

Maximum speed:

Oil:
Bed

size:

horizontal axis rotating hook.

leveling

eccentric

top

cover with oil flow indicator and bobbin winder.

armis

provided

bar

stroke:

for

matching

with

aseatfor

hinge

pin.

reverse

the

feedofthe

lever.

mountingalight

SPECIFICATIONS

FEATURES

needle

and

feed

fixture.

30.5mm-591D200A,

36.5mm - 591D300A, 591D308A, 591C300A

7.2mm

7.9mm

6 S.P.I. -

5

3.2 SP.I. (Reverse4 SP.I.) - 591D308A

5,500

5,000

4,500
3,000

SINGER* Type

476mmx178mm

- 591D200A,

- 591D3G0A,591D308A, 591C300A

591D200A,

SJ.I.

- 591D300A, 591C300A

SPA1.-591D200A

SP.M.

S.PJd.-591C300A
SP.M.-591D308A

dog.

(Compound

591C200A

591C200A

591C200A

- 591D300A, 591C200A

"C"

OU

feed

machines)

-1

-

TO

SET

NEEDLE

PREPARATION:

Removeface plate, slide plate and throat

plate. See that needle is correctly set in

needle

bar.

BAR

AT

CORRECT

HEIGHT

TIMING

MARK

On drop feed varieties, lower end

bushing A, Fig. 2, must be set as shown in

Fig, 2. To reset bushing, loosen screw B.

On compound feed varieties, this dimen

sion is automatically obtained when needle

bar

frameisassembled.

CHECK:

When needle bar is at its lowest point

(during rotationofmachine pulley), UPPER

TIMING

level

page 5.

SETTING:

end of

MARK

with

lower

Check timingofhook as instructed on

Loosen

clamping

bushing.

on

needle

endofbushing.

bar

should

screwC,Fig.2.Raiseorlower

Then

securely

tighten

of

be

screw

C.

needle

Fig. 2

barsothat

58.73mm-591D200A,

66.01mm-591D300A,

UPPER

TIMING

THROAT

SEAT

MARKislevel

PLATE

591C200A

591C300A

with

lower

Replace

When

spective

PREPARATION:

Threadthe

CHECK:

Turn

a

slight

Dshouldbe

throat plateand slideplate.

replacing

screw

machine

dip

the

face

plate,

holesinthe

machine

pulley

face

and

placealightweight

over

toward

andareturntoits

drawn

allthe waydown;settingthe stitch.As

make

plate;

higher

certain

avoiding

TO

SET

operator

position.

that

the

injurytothe

CHECK

material

slowly.

under

When

Later,astake-up

-2

screw

gasket

SPRING

presser

take-up

lever

holesinthe

and

consequent

HEIGHT

foot.

lever

beginstorise,

lever

descends,

face

plate

oil

leakage.

approaches

checkspringDreturns to rest.

gasket

are

aligned

check

springD,Fig.3makes

topofstroke,

with

check

the

spring

re

SETTING:

Loosen screw E, Fig. 3. Turn stud F, Fig.3 (at the

same time turning entire tension assembly) either

over toward lefttolower check spring and decrease
its movement,

or

over toward righttoraise check

springand increaseits movement. Securelytighten set

screw

E.

NOTE: Under certain conditions of tacking, it

may be necessary to set the check springhigherthan

it is otherwise normally set.

H

GHER

LOOSEN

CAUTIGN:

Check spring height setting must be

checked each time a different foot is applied to

machine.

TO

SET

CHECK

PREPARATION:

Thread the machine. Securely tighten set screw E,

nut

Fig. 4. Make certain thumb

CHECK:

is on stud F, Fig. 4.

Tension on check spring D. Fig. 4, should be suf

ficient to ensure action at top speed;

but

still light

enough to permit itself to be drawn all the way down
(as take-up lever approaches height of stroke) before

any thread is drawn through

the

tension discs.

SPRING

MORE

tension

LOWER

Fig. 3

TENSION

TIGHTEN

SETTING:

Using a large screwdriver in slotofstud F, turn

stud

either

over

toward

over to righttoincrease

lefttodecrease

it,

as shown.

tension

or

LESS

TENSION

NOTE: The tension on the check spring may require different settings depending upon the sizeofthread used.

Heavier thread requires more tension to ensure correct thread control.

-3

Fig. 4

TO

SET

PRESSER

S)

(9

BAR

CLEARANCE

FOOT

RESTING

FIRMLY

UPON

THROAT

PLATE

AT

CORRECT

AT

HIGHEST

POINT

HEIGHT

<S)

Si

AT

LOWEST

POINT

JUST

✓

CLEAR

I

I

PREPARATION:

Remove face plate and slide plate.

CHECK:

1. When presser foot rests firmly upon throat plate (with feed dog below throat plate) there should still be

some clearance between guide bracket G, Fig. 5 and lifting lever link H, as shown in Fig, 5.

2. When presser foot is at its highest point and needle bar is at its lowest,
of

lower end

SETTING:

needle bar, as shown in Fig. 6.

topofpresser foot should clear

LoosenclampingscrewJ, Fig. 5. Raiseor lower guide bracket G, as required. Securely tighten screwJ.

CAUTION:

ting, as instructed on pages 2

Whenever

guidebracket has been moved on presserbar, inspect the check spring for correct set

and

3.

TO

TIME

SEWING

PREPARATION:

HOOK

THE

SIDEWISE

SEWING

Remove presser foot, slide plate, throat plate and

feed dog.

On compound feed varieties, set stitch length

zero (setting feed to zero is not required on drop

feed machine).

CHECK:

When lower timing mark on needle bar is level

with lower endoflower needle bar bushing A as

shown in Fig. 7, the pointofthe sewing

be at

the

centerofthe

needle, as shown in Fig. 7.

hook

should

Also, when pointofsewing hook passes needle,

clearance between

should be approximately equal to thickness

hook

point K, Fig. 8 and needle

of

pieceofordinary notepaper (about .13mm), as shown

in Fig. 9.

HOOK

IN

RELATION

to

a

AND

ALSO

TO

HOOK

AT
OF

SET

THE

LOWER

TIMING

MARK

POINT

CENTER

NEEDLE

THE

NEEDLE

ON

UPWARD

STROKE

NOTE: Not only pointofsewing hook

"FLAT"ofhook

point

should clear scarf on needle

but

entire

blade. Normally, a .5mm clearance is provided be

of

hook

tween hub

SETTING:

Loosen two set screws L, Fig. 7 in

and oil retaining collar.

hubofhook.

Then retighten oneofthe set screws very lightly so
that the sewinghook can still be turned on the shaft.

Hold shaft immovable and turn

hook

as required

to bring pointofhook to center of needle as shown

in Fig. 7 and at the same time adjust clearance be

tween needle and

hook

point as shown in Fig. 9.

Tighten set screws L lightly, turn machine pulley

to

make certain the sewing

relation

screws

to

the

needle.

L.

hook

is correctly set in

Then

securely tighten set

Fig. 7

HOOK

POINT

Fig. 8

NOTEPAPER

Fig. 9

FLAT

HOOK

OF

POINT

FEED

REVERSE

LEVER

Before the machine leaves the factory, the spring tension

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 Y3 holding the spring retainer Z3 on the machine leg.

Move

spring retainer Z3 up or down, as required, and firmly

tighten screw

The lighter the tension, the easier it is to operate the feed

reverse lever, however

maximum stitch length and high speed sewing.

Y3.

the

tension should be

set

a little heavier for

of

Normally, the 591D200A/C200A machines are adjusted to

sew a maximumstitch lengthof4.2mm (6 s.pi.)and 591D300A/

C300A machines to sew 5.1mm (5

changed to 5.1 mm
ing dial stopper C4 on the underside

shown in Fig. 10.

if

desired, by turning over the feed regulat

s.pi.).

This however, can be

of

the feed reverse lever, as

0

Fig.

10

NOTE: The 591C200A machine can

fittings.

CAUTION:

length is changed to 5.1mm.

Before

Makesure the feed dogclearsthe front and rear edgesof the throat plate slots when maximumstitch

the

machine leaves the factory,

not

sew a maximum stitch lengthof4.2mm when fitted with standard

TO

the

TIME

feed

and

THE

feed

lifting eccentric is set for average sewing conditions; having
the timingscrew (screw M which appears immediately after set

screw N, Fig. 11, when feed eccentric is rotated toward the

operator) align on the timing mark provided for it on the arm

shaft. (Timing line on shaft for drop feed is at

needle bar is in

compound feed is at top when needle bar is in Up position.)

The timing screw M, Fig. 11, on the feed and feed lifting

eccentric should be securely tightened after it has been aligned

on the timing mark on the arm shaft. The set screw N, should

also be securely tightened.

DOWN

position, whereas timing mark for

top

when

FEED

Fig. 11

-6-

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 the timing screw Mand the set screw N.

NOTE: Whenever the timingofthe feed is changed, sewing hook should be checked for necessary adjustment

also as instructed on page 5.

TO

SET

FEED

DOG

AT

CORRECT

HEIGHT

FULL DEPTH OF TEETH

I

0.8mm

- 591D200A, 591C200A THROAT PLATE

1.0mm-591D300A, 591D308A,

t'

Fig. 12

When the feed dog is at its highest position, approximately the

full depth of all the teeth should project abovethe top surfaceof the

throat plate, as shown in Fig. 12.

Before checking the heightofthe feed dog, set the machine for

the longest stitch.

To adjust, loosen the clamping screw P, Fig. 13 and raise or lower

the feed dog (which is fastened to the feed bar Q, Fig. 13) as re

quired. Then securely tighten screw P.

The feed dog should be level at the top

its feed path.Ifnot,

tip machine back and

loosen feed bar hinge pin clamping screw A4

just enough to

tum

feed bar hinge pin (ec

centric) B4, Fig. 13. Insert screwdriver into
access hole in end

as required to level the feed dog. Securely

of

bed and

tum

hinge pin B4

tighten clamping screw A4. Check feed dog

height.

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 ex

plained above.

of

HIGHER

m

LOWER

591C300A

Fig.

.

13

NOTE: Feed dog should

centrally in relationtothe front, rear and sidesofthroat plate slots.

not

contact edgesofthe throat plate slots during its movement

-7-

but

should be located