Singer 678B002 Troubleshooting guide

SINGER

678B002,B005,B007

,BOOS

From the library of: Superior Sewing Machine & Supply LLC

Service

Manual

Bnd-

Parts

List

6788002

6788005

6788007

6788008

From the library of: Superior Sewing Machine & Supply LLC

IDENTIFICATION

OF

MACHINES

Each

678B

rrachine

is

identified

by

a

Variety

number

on

a

metal

plate

on

the

ma.chine.

APPLICATION

OF

CATAI.CX;

This

catalog

applies

specifically

to

the

standard

Varieties

of

ma.chines

as

listed

herein.

References

to

direction

such

as

right,

left,

front,

back,

etc.,

are

given

from

the

operator's

position

while

seated

at

the

ma.chine

unless

otherwise

noted.

Operating

direction

of

handwheel

is

toward

the

operator.

VARIEI'IES

OF

MACHINES

Advanced

High

Speed,

Two

and

Three

Needle,

One

Looper,

One

Spreader,

Offset

and

Tandem,

Top

Screw

Adjusted

Differential

Feed

Flat

Bed

Machines,

Medium

Throw,

Needle

Bearing

Needle

Bar

Drive,

Light

Weight

Presser

Bar

and

Needle

Bar

Driving

Mechanism,

Single

Reservoir,

Enclosed

PositiveAutomatic

Lubricating

System,

Filtered

Oil

Return

Pumps

for

Head

and

Base,

Wakefield

Bearings

for

Feed

Rocker

Shaft,

Single

Disc

Looper

Thread

Take-up

with

an

Adjustable

Cast-off

plate

Support.

Large

Handwheel

and

Improved

Belt

Guard.

Prepared

for

use

with

Knee

Press

for

Presser

Foot

Lifter,

Equipped

with

Disc

Type

Thread

Tensions,

Maximum

Work

Space

to

Right

of

Needle

Bar

8

1/4

Inches

(209.

55

mm).

678B002

Three

needle

five

thread

interlock

stitch,

offset

differential

feed

machine,

for

attaching

cuffs

in

one

operation

to

knitted

undergarments,

and

similar

opera-

tions

on

light

to

medium

weight

materials.

Seam

specification

605-FSa-1.

cat.

7 2 8 4

needle

.

Standard

Gauge

No.

16

only.

Maximum

recommended

speed

5500

R.

P.M.

f)78B005

Two

needle

four

thread

interlock

stitch,

offset

differential

feed

machine,

for

attaching

cellarettes

to

knitted

undergarments

and

similar

operations

on

light

tomedium

weight

material.

Long

lengthribbed

knit

strip

cutperpendicular

to

the

wale

or

parallel

with

the

wale.

Constant

strip

tension,

Seam

specification

602-BSa-1.

cat.

7 2 8 4

needle.

Standard

Gauge

Nos.

8

and

12.

Standard

finished

widths

3/4,

7/8,

1,

11/4

inches

(19.05,

22.23,

25.40,

31.75

mm).

Specify

gauge

and

finished

width.

Maximum

recommended

speed

5500

R.

P.M.

678B007

Three

needle

five

thread

interlock

stitch,

offset

differential

feed

machine,

for

attaching

cellarettes

to

knitted

undergarments

and

similar

operations

on

light

to

medium

weight

rna

terial.

Long

length

ribbed

knit

strip

cut

perpendicular

to

the

wale

or

parallel

with

the

wale.

Constant

strip

tension.

Seam

specification

605-BSa-1.

cat.

7 2 8 4

needle.

Standard

Gauge

Nos.

14

and

16.

Standard

finished

widths

3/4,

7/8,

1

and

1

1/4

inches

(19.

05,

22.

23,

25.

40,

31.75

mm).

Specify

throat

plate,

gauge,

finished

width

and

stitches

per

inch.

Maximum

recommended

speed

5500

R.

P.M.

678B008

Three

needle

five

thread

interlock

stitch,

tandem

differential

feed

machine,

for

patch

operations

on

flat

and

ribbed

knit

undergarments

and

similar

opera-

tions

on

light

to

medium

weight

material.

Seam

specification

605-LSa-1.

cat.

7 2 8 4

needle

.•

Standard

gauge

No.

16

only.

Maximum

recommended

speed

5500

R.P.M.

3

From the library of: Superior Sewing Machine & Supply LLC

NEEDLES

The

standard

recommended

needle

for

machines

in

this

catalog

is

Cat.

7284

(available

in

sizes

10

to

18).

Selection

of

proper

needle

size

is

determined

by

the

size

of

thread

used.

Thread

should

pass

freely

through

needle

eye

to

produce

a

good

stitch

formation.

ORDERING

REPAIR PARTS

ILLUSTRATIONS

This

catalog

is

arranged

to

simplify

ordering

replacement

parts.

Exploded

views

of

various

sections

of

the

mechanism

are

shown

on

the

left

hand

pages

so

that

parts

may

be

seen

in

their

actual

positions

in

the

machine.

On

the

right

hand

pages

opposite

the

illustrations,

the

parts

are

listed

with

descriptions

and

the

quantity

of

parts

re-

quired

in

the

particular

view

being

shown.

Numbers

in

the

first

column

are

reference

numbers

only,

indicating

position

of

a

part

in

the

illustration.

Do

not

use

the

reference

num-

bers

in

ordering.

In

the

second

column

in

the

examples

below

are

the

part

numbers

as

listed

in

this

catalog.

In

the

third

column

is

the

coded

number

to

be

ordered.

The

prefix

"910"

must

be

used.

Additionally,

letter

suffixes

generally

are

transposed

as

a

prefix

to

the

?art

number.

Components

of

sub-assemblies

which

can

be

furnished

as

replace-

ments

are

indented

under

the

description

of

the

main

sub-assembly.

The

of

this

Ref.

examples

below

show

how

to

order

using

parts

on

Page

35

catalog

to

illustrate

the

instructions

above:

Part

Order

No.

As

Description

Qty.

1

56381-219

910-56381-219

Cloth

Plate

Lever

----------- 1

2

51281

AC

910-AC

51281

Spring

----------------- 1

3

35772

H

910-H

35772

Washer

----------------- 3

4

22760

A

910-A

22760

Screw

------------------ 3

5

22845

B

910-B

22845

Screw

------------------ 1

Where

the

parts

for

all

machine

varieties

covered

in

this

catalog_

are

not

the

same,

the

difference

will

be

shown

in

the

illustrations

or

mentioned

in

the

descriptions.

When a

part

is

used

in

all

machines

in

this

catalog,

the

variety

number

is

not

mentioned.

A

numerical

list

of

all

parts

shown

in

this

catalog

appears

on

Pages

46

and

47

to

facilitate

locating

the

illustration

and

description

when

the

part

number

is

known.

4

From the library of: Superior Sewing Machine & Supply LLC

~~.-----~---.---/-_---=-·~~~~~---~

FILL

MAIN

RESERVOIR

HERE

I

fo

Fig.

1

CAUTION!

FOR

CORRECT

OIL LEVEL

NEEDLE

OF

GAUGE

SHOULD

BE

IN

OPERATE POSITION

FILL

ALL

OIL RESERVOIRS

BEFORE STARTING.

MACHINE

HAS

BEEN

DRAINED

BEFORE SHIPPING.

THREADING

AND

OILING

DIAGRAM

FOR

6 7 8 B

t1achines

Thread

machine

as

indica

ted.

The

looper

threading

has

been

enlarged

for

clarity.

The

machine

illustrated

above

is

a

three

needle

machine,

but

the

two

needle

machines

are

threaded

in

substantially

the

same

manner.

The

oil

has

been

drained

from

the

machine

before

shipping

and

the

reservoir

mustbe

filledbefore

starting

to

operate.

To

fillmachine

with

oil,

remove

plug

screw

in

top

cover

and

add

oil

until

needle

of

oil

gauge

(A,

FiR.

1)

i~

on

~he

qlack

line,

located

to

the

right

of

"OPERATE"

zone

marked

''FULL

•

Malntaln

Oll

level

in

''OPERATE"

position

and add

oil

when

needle

is

to

the

black

line

located

to

the

left

of

''OPERATE"

zone

marked

"LOW".

The

machine

is

automatically

lubricated

and

no

oilif!.g

other

th~n

keeping

the

main

reservoir

filled

is

necessary.

Use

Singer

Type

C

Oll

or

equlvalent.

Excessive

oil

in

the

main

reservoir

may

be

drained

at

the

plug

screw,

located

in

the

main

frame

to

the

left

of

the

oil

gauge.

5

From the library of: Superior Sewing Machine & Supply LLC

H

VAPOR

mSPLASH

ACTION

OIL

RESERVOIR

gOIL

FEED

lflorL

RETURN

SCRE\\

\\'ITH

BY-PAS"

CH'TI

:c:T

6

M

OIL

FRO:\I

LEFT

CRA'-:KSR'\FT

BCSHI='!G

''

I '

I

From the library of: Superior Sewing Machine & Supply LLC

Figure

Letter

A.

B.

c.

D.

E.

F.

G.

H.

I.

J.

K.

Figure

Letter

L.

M.

ADVANCED

FLA.

TBED

LUBRICATION

SYSTEM

SUPPLY

SYSTEM

Bearing

or

Machine

Area

Crankshaft

drives,

upper

ball

straps

and

crankshaft

bearings.

Needle

lever

cross

shaft

bearing.

Head

area

(all

mechanisms

and

bear-

ings).

Looper

drive

crank,

looper

drive

lever

bearings.

Opposing

Helical

grooves

in

right

end

of

mainshaft.

Short

groove

pre-

vents

oil

leakage

from

right

main-

shaft

bearing.

Right

mainshaft

bearing.

Left

main

shaft

bearing

and

all

ecc

en-

tric

bearings

located

on

mainshaft.

Lower

ends

of

connecting

rods

of

mainshaft

eccentrics.

Looper

cone,

right

and

left

looper

rocker

shaft

bearings,

and

left

loo-

per

rod

ball

joint.

Right

looper

rod

needle

bearing

joint.

Feed

rocker

shaft

and

upper

feed

rocker

shaft

bearings.

RETURN

SYSTEM

Machine

Area

Head

Base

7

Method

of

Lubrication

Oil

agitation

as

a

result

of

extens-

ions

on

needle

lever

connecting

rods.

Oil

trough

(51282

AE)

which

is

supplied

by

splash

in

column

area.

Mist

as

a

result

of

splash

in

column.

Oil

agitation

as

a

result

of

splasher

(56343

E)

on

bottom

of

looper

drive

connecting

rod.

Oil

drip

plate

which

accumulates

splash

in

chamber.

Supply

grooves

in

right

end

of

main-

shaft.

Oil

supplied

from

hollow

mainshaft

and

metered

by

felt

plugs.

Oil

is

in-

troduced

into

center

of

shaft

in

the

r i g h t

mains

haft

bearing

area.

Amount

of

lubricant

in

center

of

shaft

controlled

with

by-pass

hole

in

right

end

of

mainshaft.

Oil

run-out

from

eccentric

bearing

supplies.

Supplied

from

hollow

looper

rocker

shaft

which

contains

4

strands

of

yarn

as

a

metering

device.

Oil

supplied

from

front

base

felt

to

lubricating

plate

(56393

K).

Self-lubricated

bearings.

Method

of

Return

Felt

pad

in

head

collects

oil.

Return

pump

located

on

crankshaft

and

primed

by

oil

from

left

crankshaft

bearing.

Felt

pad

in

base

collects

oil.

Second

return

pump

located

on

crankshaft

and

primed

by

oil

drip

plate

which

accumulates

splash

in

looper

drive

chamber.

From the library of: Superior Sewing Machine & Supply LLC

INSTRUCTIONS

FOR

MECHANICS

LUBRICATION

CAUTION!

Oil

has

been

drained

from

the

main

reservoir

before

shipment,

so

the

reservoir

must

be

filled

to

the

proper

level

as

indicated

on

oil

gauge

(A,

Fig.

1)

before

beginning

to

operate.

Run

machine

slowly

for

several

minutes

to

distribute

the

oil

to

the

various

parts.

Full

speed

operation

can

then

be

expected

without

damage.

RECOMMENDED

OIL

use

Singer

Type

C

oil

or

equivalent

in

the

main

reservoir.

Fill

main

reservoir

at

plug

screw

in

upper

crank

chamber

cover

(A,

Fig.

2)

and

check

oil

level

at

gauqe

(B) .

Oil

is

maximum

safe

operating

level

when

needle

is

to

the

black

line,

located

to

the

right

of

"OPERATE"

zone,

marked

"FULL''.

Oil

should

be

added

when

needle

is

to

the

black

line,

located

to

the

left

of

"OPERATE"

zone,

marked

"LOW".

CAUTION!

It

is

important

that

these

machines

not

be

over

filled.

It

is

recommended

that

a

new

machine,

or

one

that

has

been

out

of

service

for

an

extended

period

be

lubricated

as

follows:

Remove

the

head

cover,

clean

out

lint

and

directly

oil

the

needle

bar

link

and

the

needle

bar.

Replace

head

cover

as

no

further

hand

oiling

will

be

required.

Run

machine

slowly

for

several

minutes

to

distribute

oil

to

the

various

parts.

For

machines

in

operation

check

the

oil

for

dirt

and

lint

deposits

at

reasonable

intervals.

If

dirty,

change

the

oil.

An

oil

change

is

recommended

every

2000

operating

hours.

Oil

may

be

drained

from

main

reservoir

by

removing

plug

screw

(C,

Fig.

2)

located

below

the

cloth

plate

at

front

of

the

machine,

or

by

removing

the

lower

crank

chamber

cover,

located

at

the

back

of

machine.

NOTE:

Looper

avoid

and

feed

lift

eccentrics

re-

ceive

oil

thru

the

mainshaft,

so

when

assembling

be

sure

oil

holes

in

the

eccentric

line

up

with

oil

holes

in

mainshaftwhen

spot

screw

is

in

time

spot.

OIL

GAUGE

The

oil

gauge

is

set

at

the

factory

to

show

the

proper

oil

level

in

the

reservoir.

Should

an

adjust-

ment

become

necessary,

however,

the

following

steps

should

be

followed:

1.

Place

the

machine

upright

on

a

level

table

or

bench.

2.

Remove

the

oil

reservoir

plug

screw

(C,

Fig.

2)

and

tip

machine

forward

to

drain

oil

from

the

reservoir.

3.

Make

sure

all

oil

is

drained

from

main

reservoir.

8

Fig.

2

From the library of: Superior Sewing Machine & Supply LLC

Fig.

3

OIL

GAUGE

(Continued)

4.

Remove

lower

crank

chamber

cover,

located

at

the

back

of

the

machine.

5.

Fill

main

reservoir

to

a

level

even

with

the

bot-

tom

contour

of

the

knee

press

shaft

bushing

(D,

Fig.

2).

6.

Loosen

lock

nut

(E)

on

calibrating

screw

(F),

and

turn

the

screw

to

the

left

or

right

until

the

gauge

needle

rests

on

the

black

line,

located

to

the

left

of

''OPERATE"

zone,

marked

"LOW".

7.

Tighten

lock

nut

(E)

and

replace

plug

screw

(C)

and

lower

crank

chamber

cover.

8.

Add

oil

so

that

gauge

needle

rests

on

the

black

line,

located

to

the

right

of

''OPERATE"

zone,

marked

''FULL".

NEEDLE

LEVER

BEARING

OILER

Remove

the

head

cover

and

upper

crank

chamber

cover

(G,

Fig.

2).

Check

position

of

needle

lever

bearing

oiler

(A,

Fig.

3)

located

inside

the

arm

casting,

below

the

upper

crank

chamber

cover,

which

lubricates

the

needle

lever

stud

(B).

Make

sure

it

is

tilted

downwardly

and

that

its

delivery

end

(C)

contacts

the

inside

wall

of

the

bed

casting

at

the

back,

just

above

the

notch

of

the

needle

lever

shaft

stop

collar.

(Do

not

allow

the

oiler

to

rest

on

the

needle

lever).

Allow

1I64

inch

(.

40

mm)

clearance

as

in

Fig.

3.

ALIGNING

THE

NEEDLE

BAR

Align

the

needle

bar

(A,

Fig.

4)

and

set

to

height,

using

the

proper

test

pins

and

test

plate

of

the

right

gauge.

See

chart

below.

Machine

Test

Plate

Right

Test

Left

Test

Style

No.

678B002

698

BB-16

699 D

699

L

fi7'3B005

698

BB-8

699

R-8

699

L

670,"?.005

698

BB-12

699

R-12

699

L

6738007

None

699

L

673B007

698

BB-16

699

D

699

L

673:SOOJ

698

BB-16

699

D

699

L

Insert

test

No.

699 L

in

the

left

seat

of

the

needle

holder

and

the

proper

right

hand

test

(See

Chart)

should

be

inserted

in

the

right

needle

seat.

Now

assemble

test

plate

to

machine

using

the

throat

plate

attaching

screws.

The

needle

bar

is

located

properly

if

the

test

pins

align

with

the

holes

in

the

test

plate

and

the

height

of

the

needle

bar

is

correct

when

the

shoulder

of

the

test

pins

rest

on

the

test

plate,

when

the

needle

bar

is

at

its

lowest

position.

9

From the library of: Superior Sewing Machine & Supply LLC

ALIGNING

THE

NEEDLE

BAR

(Continued)

If

test

plate

and

test

pins

are

not

available,

insert

a

new

set

of

needles

(Type

and

Size

as

required)

and

align

the

needle

bar

so

the

needles

center

in

the

needle

holes

of

throat

plate.

To

align

needle

bar,

loosen

needle

bar

clamp

screw

(B,

Fig.

4)

and

turn

bar

as

required.

Tighten

clamp

screw.

SYNCHRONIZING

LOOPER

AND

NEEDLE

MOTIONS

Check

the

synchronization

of

the

looper

and

needle

motions,

using

gauge

No.

21227

R

as

follows:

Insert

the

pin,

which

is

included

with

the

gauge,

in

the

back

hole

in

the

looper

rocker.

Place

the

gauge

plate

on

the

throat

plate

seat

using

the

throat

plate

screws

for

attaching.

Place

the

shank

of

the

indicator

in

the

take-up

wire

hole

in

bed.

Turn

the

handwheel

in

operating

direction

until

the

in

the

looper

rocker

contacts

the

edge

of

the

gauge

plate

andset

theindicatorso

thatthe

leftend

ofthe

point-

er

rests

against

the

top

of

the

needle

bar

and

the

right

end

of

the

pointer

rests

at

'b".

Tighten

the

set

screw

and

note

indicator

reading.

Turn

the

hand-

wheel

in

the

reverse

direction

until

the

again

contacts

the

plate.

If

the

motions

are

in

synchroni-

zation,

the

pointer

of

the

indicator

will

return

to

the

same

reading.

A

variation

of

one

graduation

on

the

scale

is

allowable.

If

the

reading

is

higher

on

the

scale

when

the

handwheel

is

turned

in

the

opera-

ting

direction,

the

looper

drive

lever

shaft

will

have

to

be

moved

to

the

rear.

If

the

reading

is

lower,

this

shaft

will

have

to

be

moved

to

the

front.

NOTE:

If

gauge

No.

21227

R

is

not

available,

syn-

chronization

may

be

checked

as

follows:

Fig.

5

Fig.

4

Insert

the

looper

in

the

looper

rocker

and

turn

handwheel

in

operating

direct-

ion

until

the

point

of

the

looper

(A,

Fig.

5),

moving

to

the

left

is

even

with

the

left

side

of

right

needle

(B).

Note

the

height

of

the

eye

of

the

needle

with

respect

to

the

looper

point,

then

turn

handwheel

in

the

reverse

direction

until

the

looper

point

again

moves

to

the

left,

and

is

even

with

the

left

side

of

the

right

needle.

10

From the library of: Superior Sewing Machine & Supply LLC

Singer 678B002 Troubleshooting guide

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