Pfaff 341, 343, 345, 353, 342 Instruction Manual

;•. ?w

•i

•:.•

^

( PFAfF ) 341;

^ .(5)

( PFAFF )

56-12-09661

engl.

P 770

PrintedinGermany

^^(s)

Single-Needle

and

342;

Two-Needle

Instruction

343;

Cylinder-Bed

344;

Cylinder-Bed

Book

345

346

and

Sewing

and

Sewing

353

Machines

"

354

Machines

C)

1.

General

The

Pfaff 341. 343. 343 U-12

hand

balance

wheel

whose

Pfaff 353 with left-hand

needle.

Both

the

Pfaff 341

and

353

are

feature

All

of

c

oeginning or ending a seam. Observation of this rule prevents

of

The

It is

Pfaff Pfaff

Pfaff

Pfaff Pfaff Pfaff Pfaff Pfaff

unison

the

afore-mentioned machines

the

top

shaftistransmittedtothe

is

recommendedtomake

the

needle

holding

both

maximum

recommendedtorun

341 342 343

343

U-12 344 344

U-12 345 346

and

fitted with

feed.

eye

and

threads

stitch

lengthofstandard

and

vertical

balance

342

are

ordinary

sure

thread

jamming in

when

beginningtosew.

the

machinesatthe

345

are

all cylinder-bed

hookisarrangedtothe

wheel

has

the

sewing

equipped

drop

are

that

with

feed

equipped

hook

shaftbybevel

the

take-up

the

machines

compound

only.

The

with

hook raceway. It eliminates

is 4.5 mm (5V2 s.p.i.).

following

2.600

2.500

2.700

1.400 2,600

1.400

2.500

2.400

sleeve

leverisat

hook

Pfaff

top

s.p.m. s.p.m. s.p.m.

s.p.m. s.p.m.

s.p.m.

sewing

feed

345

take-up.

gears.

machines

right of

the

arrangedtothe

while

the

Pfaff 343. 344

and

the

Pfaff

The

rotating motion

its

highest

the

thread slipping

the

speeds:

with right-

needle.

left of

346

point

necessity

The

the

both

before

out

o

When sewing tightly woven or heavily

reducedtoprevent

overheatingofthe

dressed

needle.

fabrics,

the

sewing

speed

must be

On two-needle machines, the maximum sewing speed diminishes as the needle gauge

«creases.

To avoid trouble,

all parts in movable

other.

This

All machines

balance wheel. If desired, however, the machines

pulley.

should

are

these

machines should be run at about 70% of their top

contact

normally

regularly

have

be

the

equipped

become

thoroughly glazed by their action upon each

case

after

about

two

with a fixed pulley which is

can

be supplied with a disengageable

weeks'

constant

castinone

speed

use.

with

until

the

If fitted with a disengageable pulley, the machine is dispatched with the sewing mecha nism disengaged. To engage this mechanism, hold the balance wheel steady with your

left

hand

and

The only

better

spool

because

thread

tighten

holderonthe

the

control.

the

thread

large

locknut by turning it clockwise.

machine

stand

armissuppliedonspecial

which is regularly

supplied

request

with

andatextra

the

machine

cost

ensures

Setting

3

machineisdrivenbya

machines, is a squirrel-cage induction motor conforming to German

deifications.

ransmitted

elt for the

e

36

or

-quires some experience to correctly adjust the

3ssive

"le machine. v J

beltiscorrectly

9, by about 2 cm (abt.

'is

1

machineisfitted

'e

Up

Voltage

from

first

rapidly.

bolt (d in

until

pulleys.

the

All

Fig.

V-belt

pressureonthe

position,

with

the

securely

machine

the

Machine

V3-HP

clutch

motor

which,

like

all

motors

and

typeofcurrent

the

motortothe

time,

do not force it onto the

motors

are

pivotally

1). Loosen the nut of the hinge bolt or clamp screw k and

can be

arm

easily

shaft

tensionedifyou

V*')

midway

tighten

the

at the

factory

class and the permissible top speed.

are

sewing

machinebya

connected

placed in the

bearings

can

hinge

with

and

compressitwith

between both

bolt

the

correct

determinedbylocal

V-belt.

pulley

because distorted

to the

motor

bracketbymeans

grooves

tension

the

pulleys.

nut or

motor

of the balance

on the belt so as to

resultant

clamp

overheating

two

fingers,

screw k

and

motor

requirements.

When

without

(Fig.

supplied

DIN

with

42691

Power

mounting

V-belts

lift

wheel

and

sei2ln(^^

wear

of a

the

and

avoid

applying

1).

pulleyinaccor-

the

3.

Cleaning

Proper cleaning and regular

you put the machine into operation for the first time, take a clean rag and remove the

dust

accumulatedintransitaswell

and polished parts. Then apply a few drops of kerosene to all oiling points marked in

red on the

foot and run the

sewing machine oil No. 280-1-120122 for this purpose.

All

oiling

pointsinthe

2),

and

tilt the machine back, resting it on

he cotton inthe hook

soaked

the

similar

When replacing the needle plate, make sure that position finger F of the bobbin case base enters slot P on the underside of the needle plate

The

the grease in the cases should be grease the flanks of the bevel gear teeth should be greased only

lint

bevel

with

which

wooden

No.

and

Oiling

oiling

will

increase the service life of your

as the rust

machine

points

oil every day. Once a week, unscrew needle plate and feed dog and remove

and unthread the needle. Place a piece of

machine

are

cylinder

has accumulated in the

object.

briefly.

Next,

apply

markedbyarrowsinthe

arm

of the

machine,

raceway,

which

is accessible

vicinity

gears are enclosedincases and

c^ianged

280-1-120243.

Thanks to the special lubricating properties of this grease,

preventative

oil to

all

pertinent

loosen

wing

the

wooden machine rest.

through

of the

sewing

requirenospecial

once a year. For this purpose, use soda

covering

fabric

points of

illustrations.Toget at the

nutF.swing

hole O hook,

(Fig.

15).

maintenance,

lightly.

machine.

all

nickel-plated

under the presser

friction,

away

(Fig.

usingatoothpick

using

latchG(Fig.

16).

should be

except

Before

Pfaff

oiling

that

or

R

6835

R

6977

R

6976

.ing trouble, suchasskipping of stitches and thread breaking,

cannot

be remedied

applying excessive quantities of oil. Excessive oiling may result in soiling of

?rial and heavy working of the machine

strongly

•re

aasthat

ction.

direction

idicated

recommended

you

plug

the

machine

indicatedonthe

of motor pulley rotation is

by an

arrow

to test-run

in,

motor

in Fig. 3.

however,

rating

caused

the

machine

checktomake

plate,

and

correctifthe

by a mixture of oil residues

without

the

balance

thread

sure

motor

and

the

pulley

wheel

bobbin

line

voltageisth(

turnsinthe

turns

case.

right

toward

direction of pulley rotation is best checked before mounting the V-belt. If the V-belt

already lightly tipping on

•3

.viresatthe

r run a

ser

been

pulley

turnsinthe

threaded

footIsraised.

mounted,

motor

dieck

the

pedal

while holding

wrong direction,

terminal

machine

board.

unless

the

direction of rotation by switching on

the

you

balance

maintenance

have

fabric

wheel

man

under

fast.

has

the

merely to

presser

the

motor

exchange

footorthe

the

and

you,

5.

Removing

Raise

the

your

thumb.

illustrated

and

forefinger.

j

Winding

c^.

The

bobbinIswoundonthe

Placeaspoolofthread between

few

bobbin

Start

matically regulated

for

If the

positionofthe

tension

turnsofthread

winder

the

less

thread.

thread

the

take-up

above,

bobbin

when

by

lever

Slightly

and

the

Bobbin

discs3and,

on

spindle.

winderbypressing

the

bobbin

screw7.Turn

should pile up at

bobbin

Bobbin

lift

takeitoutofthe

Case

to its

highest

the

bobbin

power-driven

on pin 1.

the

Pass

from

bobbininclockwise

is full.

The

this

screw

one

winder

tension

position case

the

down lever 6.

amountofthreadtobe

end

bracket,asappropriate.

and

open

with

the

forefingerofyour

machine,

bobbin

thread

inside,

clockwise

together

winder

through

direction,

The

for

more

of the bobbin, loosen

latch

B (Fig. 4) with

with

the

bobbin,

shown

in Fig. 5.

eyelet2,clockwise

the

slotinthe

and

place

the

bobbin

thread,

winder

wound

or

counter-clockwise

screw

on

4 and

the

right

hand,

with

around

bobbin.

latteronthe

will

stop

the

bobbin

adjust

nail of

thumb

Wind

auto

as

and

a

is

the

Threading

3 the

full

TOW in

Fig.6when

the

bobbin

ension

spring

--

the

bobbin

:•

latch

B (Fig. 4).

and

Replacing

bobbin in the bobbin case so that it turns in the direction indicated by

you

fastinthe

and

into

case

with

the

pull

the

bobbin

delivery

the

bobbinonthe

thread.

case,

eye

Bobbin

pull

Y.

Case

the

center

thread

studofthe

into

slotX,and

bobbin

drawItunder

case

base

and

8.

Selecting

All

Pfaff

meterof2.0mm(approx.

High-lift

4.0 mm (approx.

Pfaff

cylinder-bed

sizes

indicated.

The

number

-

shaft,orblade,inhundredthsofa

meter

of '""/loo mm = 1 mm.

The

correct

Thread Chart on

System

134

applicationsofthe

For

fabncs.

styles

are

134

Lr

134

P m

134

Lack

134

PCI

134

S I

134

D ^

134

Vr

134

Vr

the

Correct

machines

machines,

available

341, 343. e.g.

Vsz")

sewing

Model A for Model B for Model C for

indicating

needle

page

and

134-35

machine

all

machines

#

Narrow

to

the

nally

V«").

the

longer.

machines

the

size

foragiven

10.

needles

use

for

leather

reverse

rightofthe

toward

Pfaff

for

Extra-narrow

the

lineofstitching;

left.

m

Needle

with

Extra-narrow,

angle of 90 degrees to the

Narrow

makes

Triangular

straight

«

Reverse-twist

the

cross

long, straight stitches.

point;

stitches.

rightofthe

345

point

Needle

and

353

while

the

345inModelH3.

are

needle

sizes

needle

sizes

needle

sizes

needle

sizeisidentical

millimeter.

thread

are

availableinseveral

fabric

and

round-point

work:

twist

point;

lineofstitching,

the

left.

wedge

point;

makes

for

patent

left-twist

point;

spear

lineofstitching;

cutting

flat

point;

groove,

side

use

Pfaff

System

Pfaff

343

U-12isfitted

use

System

suppliedinthree

60 to 80 90 to 110

120 to 160

with

Thus,aNo.

shouldbeselected

leather

stitching.

needles,

cutting

while

edge

setatan

makes

cutting

edge

setatan

stitches

lineofstitching;

cutting

leather

wedge

edge

set

facing

edge

supersedes

which

(narrow

point;

paralleltothe

toward

setatan

134

needles

with

134-35

models

the

diameterofthe

100

needle

point

stylestosuit

the

following

stitches

angleof90

extend

diagonally

cross

cutting

for coated

the

sewing

angleof45

134Sand

withashank

System

fitted

190

needles

for

which

the

hasashaft

from

the

Needle

different

needle

angleof45

which

degrees

extend

degrees

toward

point).

edge

setatan

fabrics.

lineofstitching:

hook;

degrees

134Dneedles.

dia

needles.

are

needle

dia

and

point

diago

to

the

makes

to

The

appearanceofthe

correct relationship between needle, thread and fabric.

Lightweight

punctures.

When

thread

The

tableonpage10is

fabrics

thick

threadisusedina

usedina

thick

finished

shouldbesewn

seam

and

withathin

thin

needle,

needleislikelytocause

merely

intendedasa

trouble-free

needleinordertoavoid

the

threadislikelytobreak,

skippingofstitches.

guide

for

sewing

selecting

greatly

the

correct

dependonthe

ugly

needle

while

thin

needle

size.

edie

and

Thread

Chart

Synthetic

10.

Lead

3,

thread

Threading

the thread

the

Needle

from

the spool

through

the holesof thread guide 2

retainer 4, clockwise around and

between

tension

{Fig.

7),

thread guide

discs5.under

thread

controller disc 6. through thread check spring 7. up and through thread guide 8. from

right to left (on

Pfaff

353 machines

from

left to

right)

through the hole of take-up lever

9. down and through guides 8, 10 and 11. and from left to right (on Pfaff 353 machines

from right to left) through the

in Fig. 13.)

needle

eye. (Upper threading of the Pfaff 353 is illustrated

R

6978

18/2

:hanging

.

the

e

outofthe

.

the

Its

ce

nes

0

set

needle

new

short

wheel

the

screw

the

bar

needle

needle groove

the

short

again.

Needle

to its

highest

clamp.

Into

the

faces

toward

sewing

hookisarranged

grooveofthe

needle

point.

Loosen

clamp

and

the

right. On Pfaff

to

must

the

face

the

needle

push

It upasfarasit will

353

leftofthe

toward

the

set

screw

machines

needle.

left.

Securely

and

with

Hence,

pull

go,

making

left-hand

on

tighten

the

these

the

11. Drawing Up

Hold

the end of the needle thread and

the

Bobbin

Thread

slowly

turn the balance wheel toward you

the bobbin thread comes up through the needle hole in a loop.

Lay

both

threads

back

under

the

presser

foot.

6 M

until

12.

Regulating

i"urning tension nut M (Figs. 7 and 13) clockwise

:iockwise

t

the

lat

: the

">e

-oth

material,asillustrated in Fig. 10. /

oper

jper

decreases

upper

it forms small kinks on

upper

materialorthe

tensions

tension

the

needle

it.

tensionistoo

tension

is too tight,

needle

are

correctly

too

looseorlower

too

tightorlower

Thread

thread

Tensions

tension

loose,

the

undersideofthe

the

bobbin

breaks

balanced

tension

bobbin

threadisdrawn

(Fig. 9).

if

both

too

tight.

too

loose.

increases

thread

material,asshown

threads

the tension, turning it

draws

Interlockinthe

the

up to

needle

the

thread

in Fig. 8.

upper

center

counter-

down

surface

of

the

13.

Regulating

the

Stitch

Length

On all cylinder-bed machines with right-hand balance wheel, the stitch lenght is regu

lated by turning

counter-clockwise

so

of

lengthinmillimeters.

All machines, with the exception of the Pfaff 343

spring-return feed regulator. A tension spring incorporated in this mechanism nently holds the feed regulator lever down in forward feeding position. To backtack

the

end

of a

released,

C'f

;edal which makes it

forward

desired,

screw

S (Fig. 11). Turn this

for

longer

seam,

simply

sewingisresumed

all

machines

possible

R

screw

clockwise for

stitches.

push

featuring

to reverse the direction of feed by foot action.

7000

The

numbers

this iever up as far as it will go. When the lever is

instantly.

this

typeoffeed

on

the

U-12

and 353,

regulator

scale

are

canbeequipped

shorter

indicate

stitches, or

the

stitch

regularly fitted with a

perma

with

a

Fig. 10

tensions

ith

-len

the

-3

work

?

back

the

needle,

egulating

<e

the

g. 6)

e tension is

en

pulling

Duckering

56

both

correctly

presser

canbeeasily

(in

forward

skippingofstitchesorthread

tlie

bobbin

clockwisetoincrease

correct

the

occurs

tensions

balanced.

footisraised,

removed

feeding

thread

case

outofthe

if a

noticeable

thread

outofthe

on

delicate

slightly.

the

upper

tensionisautomatically

from

the

machine.Toremove

direction),

tension

the

never

toward

breaking.

machine

tension,orcounter-clockwise

fabrics

and,

using

resistanceofspring

bobbin

case.

although

you.asthis

the

hook

the

tension

the

screwdriver,

to

Y (Fig. 6)

has

releasedsotha^

work, pull it

might

cause

turn

decrease

has

been

to be

set

It.

overcome

correctly,

toward

bending

screw

Z

Fig.

:0m

11

Hough

the

He!atthe

^

Pfaff

353

Pfaff 353 is Identical with

left, its feed

sews

forwards

regulator

only.

differs

the

Pfaff 343,

considerably.

except

thatithas

the

balance

this machine, the stitch length is regulated as follows; Press button K (Fig. 12) with

thumbofyour

ction

indicated

ncrease

the

stitch length,

right

by an

hand

arrow

and,

until

keep

with

your

the

button

button K

left

hand,

drops

engaged

rotate

the

in noticeably. and

continue

balance

turning

wheelinthe

the

balance

el in the direction indicated by an arrow until the number corresponding to the

red

stitch

length

appearsinthe

small

window

above

button

K.

14.

Regulating

Turning in screw V (Figs. 7. 13 and 18)

and

harder

materials.

the

Pressure

on

the

Material

increases

the

Lightweight and delicate materials require a lighter

turning

Some

arm

pressure

turningitdownwards.

screwVout.

variantsofthe

insteadofthe

Pfaff 345

conventional

are

presser

equipped

bar

with

spring.

oneortwo

On

is increased by turning knurled nut V upwards (Fig. 14), and

presser

pressure

leaf

these

foot

pressure

for heavier

which is obtained by

springsonthe

machines,

the

presser

decreased

machine

foot

by

iecrease

number

)ting

)uble-headed arrow together with a " + " and a symbol

the

stitch length, turn

appearing in the

the

longest

stitch.

the

window

balance

wheelinthe

indicates the

opposite

stitcSi

lengthinmillimeters,

direction.

engraved

with

.

with

in a small

• on the fiat top cover further facilitate the regulation of the stitch length. Turning

balance wheel toward *+ "

ises

the

stitch

length.

increases

the stitch length, turning it toward ' de-

-4V

"40^

R

Fig.

6972

M 1

i-Kf H

0

mum.

^wm

13

Fig.

12

5.

Changing

}

change

len

ten

dersideofthe

>ver

3

take

replacing

run

bobbin

the

out

the

case

the

feed

both

the

needle

machine

and

Feed

dog,

feed

needle

bobbin

Dog

take

out

screwsaandband

dog

screwscanddand

plate,

plate

(Fig.

with

the

needle

case

openerL(Fig.

make

15).

plate

sure

removed

remove

position

16).

remove

since

the

feed

fingerFenters

this

needle

dog

(Fig.

may

resultindamage

plate

(Fig.

16).

slotPon

R

6974

15).

the

Clean

the

sewing

checktomake replaceitand

Replace

again

to

R

the

enters

6975

hook

sure

soak

bobbin

slot P on

thoroughly,

the

cottoninholeOhas

the

new

cotton

case

baseinthe

the

undersideofthe

particularly

with

oil.

sewing

needle

the

not

hook,

hook

become

making

plate

raceway.

matted

sure

(Fig. 15).

that

At

(Fig.

position

the

same

15). If it

finger

time,

has,

F

Ng.15^

Cleaning

dismantle

e2

and

.vly

turn

3way N of

ed

out

it

upwards,

the

e3,

the

easily.

the

Sewing

sewing

and

remove

balance

sewing

Todothis,

while

hook,

wheel

hook

rocking

Hook

bring

the

hook

until

(Fig. 15). In

take

the

gib

point

the

balance

needle

(Fig. 15).

S of

this

center

wheel

bar

the

position,

stud

back

to its

bobbin

between

and

highest

the

point,

case

baseisabouttoenter

bobbin

case

thumb

and

forth.

take

out

base

forefinger

screws

can

and

be

Fig.16_

%

17.

Changing

Raise

the

balance

Loosen right

and

When

and

positionitso

the

presser

wheel.

screwf(Fig.

left.

replacing

the

Vibrating

bar

vibrating

that

lifter

and

bring

17)

and

pull

presser.

the

needleisproperly

Presser

the

out

take

-mm

on

unison-feed

needle

the

vibrating

care

that

centered

K.'-.M

machines

bar

to its

highest

presser,

you

in its

turningitslightlytothe

pushitupasfarasit will

needle

positionbyturning

hole.

go

18.

Adjusting

In

ordertoadapt

sewn,

loosen

slotofthe

Move

this

The

arrowsinFigs.

the

wing

lifting

crank

connection

Foot

lift of

nutFand

(Fig.

upwards

17, 18

R

Lift

on

unison-feed

the

vibrating

adjust

the

18).

for a

higher

and22indicate

6965

presser

position

to

of lifting

lift,ordownwards

the

oiling

machines

the

thicknessofthe

eccentric

for a

pointsofunison-feed

t, -

materia'

connection

lower

H

lift.

machine

m

F»0-

•'7

Fig.

18

Additional

Instructions

for Pfaff 342, 344 and 346 two-needle, cylinder-bed sewing machine with right-hand

balance

wheel

and

the

Pfaff 354

two-needle

machine

with

left-hand

balance

wheel

The basic instructions given for the single-needle machines analogously apply to the

corresponding containedonthe

19.

Upper

two-needle

following

Threading

versionsofthese

pages.

of

Two-Needle

machines,

Machines

too.

Additional

instructions

are

Thread the right needle like on a single-needle sewing machine, leading it from 1 to 12

as

illustratedinFig.

To thread the left needle, pass the thread

thread

guide2,the

19.

upper

holeofthread

from

spool 13 (Fig. 19) through the holes of

guide3.thread

retainer

14,

clockwise

around

anc

between tension discs 15,around the rear thread controller disc 16, through thread check

spring 7, up and through thread guide 8,

take-up lever. 9. down and through thread guides 8 and 10, the left hole of

holder

17,

an^from

is

regulatedbyturning

righttoleft

nut

through

2.

from

right to left through the upper hole of

the eye of the left needle

R

8320

18.

The thread tension

needle

20.

Cleaning

The

instructions

applytothe

bobbin

from

thatofthe

The

needle

by

screwscandd(Fig.

R

8317

sewing

case

opener

plateissecuredinpositionbyscrewsaand

h

the

given

other

Sewing

for

cleaning

hooks

L of

the

bobbin

20).

HooksofTwo-Needle

the

of

two-needle

second

case

sewing

hookisarranged

opener

hook

machines.Itshould

(Fig.

20).

of a

in a

Machines

single-needle

be

position

b (Fig. 21)

machine

noted,

diagonally

and

however

the

feec

iiv

a

Fig. 19

Fig.

R

8316

Fig. 21

20

To dismantle the sewing hook, take out screws

el,

e2

and

e3

(Fig.

20)

and remove

the hook gib. Then rotate the balance wheel until point S (Fig. 21) of the bobbin base is about to enter raceway N of the sewing hook. In this position, the bobbin

base

canbetipped

out

easily.

The second sewing hook Is dismantled in the same sequence.

The cotton in hole O of every sewing hook

(Fig.

21) should regularly be soaked

so as to ensure proper lubrication of this vital part over a longer period of time.

After

tilting

the

machine

back,

oil

the

oiling

points

markedbyarrowsinFig.

22.

with

case case

oil

Additional

for

Pfaff

The Pfaff 343 U-12/02 is a

Stop

motor

squirrel-cage

an

extra-large

Other

than

ordinary applytothe

21.

Pfaff

Threading

machines

andaroller

induction

vertical

that,

343sothat

former,

Instructions

343

U-12/02

thread

motor

rotary

the

mechanical

all

the

only

the

Needleofthe

and

343

U-12/03

single-needle

tension,

andadisc-type

hook.

setupofthe

operating

exception

and

being

Pfaff

sewing machine

while

the

Pfaff

tension.

Pfaff

servicing

Chapters10and

343

Both

343U-12isidentical

instructions

U-12

equipped

343

U-12/03isfitted

machines

are

given

13.

with a two-spr

wif

equipped

with

that

for

the

latter

"t.ead the thread from the spool up and over the thread guide at the top of the thrc

^'itand,

down

and

through

tainer leaditclockwise

Then

through

and es,

through

The

needles and

es.

single-needle

stud.

pass

through

and

Pfaff

It is

the

thread

Now

it around the

the

thread

both

from

the

needle

344

twin

threaded

through

winditonce

retainer,

around

the

holeofthe

making

and

around between

thread

guide, from right to left

thread

guid

left

to

right

eye.

U-12

has

two

thread

guid-

just

like

a

machine,

ex-

sure

angular

that

the

roller

tension

thread

tension

enters

discs

controller disc, through the

through

the

III

guideonthe

the

slotinthe

of a

subcl.

of a

subcl.

thread

check spring, up a

eyeofthe

machine

-12/02

-12/03

take-up

arm.

thread

machine

machif

lever, do

of

a

i-.

R

8319

Fig.

22

needleisthreaded

to left,

the

right

needle

from

R

9770

Fig.

right

from

a

23

ft

22.

Trouble

SkippingofStitches

Cause

Wrong

Needle

Needle Inserted incorrectly.

Incorrect

Thread

Cause

For

anyofthe

Thread

Knotty

thread.

Needle

Thread

snarled

Faulty

Stitch

Cause

Improper

Wrong

needle

Piecesofthread

or

under

Needle

Breaks

Cause

Wrong

needle

Needle

Machine Works Heavily

Cause

Lackofoil.

Wrong

Hook

thread.

bent.

too

lubricant.

race

Shooting

needle

system.

bent.

threading.

Breaks

reasons

tensions

too tight.

poiT^bluntordamaged.

up.

Formation

tension.

size

and/or

between

bobbin

case

tension

system.

thin.

obstructedbypieces

indicated

thread

tension

above.

used

discs

spring.

of

Remedy

For

correct

Insert new

Orient

toward

Thread

10.19and

Remedy

See

remedies

Regulate Use high-quality

Replace

Check

to

needle.

Remedy

Regulate

Correlate in

tableinChapter

Remove

structedinChapter

Remedy

Insert

in

Chapter

Insert Insert

Remedy

Oil machineasinstructed in

and

18.

needle

system

see

Chapter

needleasinstructed in

needle

upper

needleofcorrect

new

thicker

so that its

the

sewing

needle(s)asinstructedinChapters

21.

listed

tensionsasinstructedinChapter

thread

needle.

threading

tensionasinstructedinChapter

needle,

thread

8.

and

8. . .

needle.

short

hook.

above.

only.

from

and

re-adjust

12.

systemasinstructed

Chapter

groove

spoolofthread

fabricasshown

tension

Chapters

8.

faces

as

3. 16

Use only non-resinous and acid-free sewing

machine

oil.

Try to free the jammed threadasyou rock

the

balance

action fails,

instructedinChapter

wheel

dismantle

back

16.

the

and

sewing

forth.Ifthis

hook

as

12.

in

Contents

1.

General

9.

2. Setting Up the Machine

3. Cleaning and Oiling

7,

4. Test-Running

5.

Removing

6. Winding

the

Bobbin

Case

.

7. Threading and Replacing the Bobbin Case

^

Selecting

9.

Changing

10. Threading the Needle

11. Drawing Up

12. Regulating the Thread

the

Correct

Needle

Bobbin

Needle

. .

....

Thread

Tensions

.

13. Regulating the Stitch Length .

14. Regulating the Pressure on the Material

15. Changing the Feed Dog

....

16. Cleaning the Sewing Hook

17. Changing the Vibrating Presser

18. Adjusting the Foot Lift

Additional

for

with

19.

"^Cleaning

Additional

for Pfaff machines 343

21.

Threading

Instructions

Pfaff

342,

344

and

right-hand

left-hand

Upper

balance

ThreadingofTwo-Needle

the

Sewing

instructions

the

Needle

346

wheel

U-12/02

....

two-needle,

wheel

and the

cylinder-bed

Pfaff

354

Machines

HooksofTwo-Needle

and 343

of the

Pfaff

U-12/03

343

U-12

sewing

two-needle

Machines

machines

machine

22. Trouble Shooting

24

Pfaff 341, 343, 345, 353, 342 Instruction Manual

Specifications and Main Features

Frequently Asked Questions

User Manual