Pfaff 3334 Service Manual

IS'

' " (D

(TOFF)

Automatic

SERVICE

Lockstitch

3334

Bortocker

MANUAL

Foreword

Pfaff sewing machines

are

quality products. Constant checks ore

being made throughout the production process to ensure that o

But

high quality standard is maintained.

machine

results

has to be operated and serviced

aretobe

obtained.

even the best sewing

skillfuify

if satisfactory

This book has been compiled cs a source of information for all Pfaff mechanics servicing Pfaff 3334 automatic bartackers and

will serve as a valuable guide in performing minor repairs and

adjustments.

We have made every effort to render the presentation of these

instructions as simple as possible and have included numerous

illustrations inordertoafford a better understanding.

G.M.PFAFF

Kaiserslautern

AG

Branch

SERVICE

MANUAL

Automatic

PFAFF

Lockstitch

3334

Bortocker

Contents

A.

Description

1.

General

and

Information

Operation

a. Purpose of Employment 6

b.

Application

Possibilities 7

Page

5

Operation

2.

a. Efficiency Rating 8

ModeofOperation

b. c. Sewing Cycle 9

3. Mechanical Setup . 13

a.

Shuttle

b.

c.

d.

Thread

B. Instructions for

ond

Feed

Motion

Automatic

Trimming Action 20

Needle

Stop

Repair

Bar

Motion

Drive

.

13

18

30

1. Disassembly , 30

2. Assembly 31

3. Adjustment

a. Timing the Shuttle

and

Check-Up 33

and

Setting the Needle Bar ot Correct Height 33

b. Timing the Feed Motion 39 c. Timing the Thread Trimming Action 46

Work

d. Adjusting the

Clamp 49

8

e. Timing the Stop Motion 49

f. Timing the Thread

Nipper

and

Adjusting the Thread Tension 53

4. Stitching-Off 60

a. Sewing

b.

Needle

Thread

c. Bobbin Winding 61

Needle

d. e. Threading the Bobbin f. Inserting the Bobbin

5.

Setting-Up

a.

Individual

b.

Bench

c. Individually Powered Machine on Power Benching

6.

Subclass

Threading 62

Case

Power

Drive

.

....

Conversion

a. Changing the Feed Cam 69

b. Changing the Knife Cam 70

c. Changing the Work Clamp Feet 71

d. Changing the Feed Plate 71

60

63 63

64

67

68

69

7. Trouble Shooting 71 a. Skipped Stitches 71

b. Thread Breaking

71

c. Needle Breaking 71

d. Heavy Working 72

e. Irregular Stopping 72

8.

Machine

Care

75

a. Cleaning and Oiling 75 b. Dismantling the Shuttle Race 77

C. Electromagnetic Control 78

1.

General

a.

Information

78

Brief Description 78

b. Key to Symbols Used 79

Operating

2.

Instructions for X35

and

X45 Devices 80 a. Turning on Master Switch HS 80 b. Inserting the

Work

and

Operating

Foot Switch FS (1st Switch Position) 80

c. Starting the Machine by Operating

Foot Switch FS (2nd Switch Position) 80

d. Sewing Cycle

and

Automatic Stopping of Machine

....

3. Working of Device 84

a.

Master

Switch

HS

b.

Foot

Switch

FS 84

c.

Solenoid

d.

Solenoid

e.

Switch

4. Mounting

a.

Switch

b.

Lever

c.

Solenoid

d.

Switch

e.

Solenoid

EM

HM

and

Switch

ES

SS

and

Adjustment Procedures 87

ES

B

EM

SS

HM

80

84

86

87

D.

Subclass

1. Subclasses Having the

2.

Subclasses

Information

Having

the

Same

Gear

Ratio 92

Knife

Cam

91

93

3. Subclosses Requiring Additional Parts 94 One

4. Principal Parts Varying from

5. Special

lock

6.

Organizational

Designs

Arranged

Parts 96

by Shapes 99

Subclass to

Another

....

95

A. Description

1.

General

and

Operation

Information

Stitch Type:

LoopTaker System;

Bobbin Capacity:

Needle System:

Foot

Lift:

Maximum

Length of Tack:

Maximum

WidthofTack:

ClassesofWork:

Lock

stitch

Oscillating (central bobbin) shuttle

66 yds No. 40/3 cotton

Model A and B machines use System 34 R needles for

Lr

110).

or 34 D

Model C

sewing

ordinary sewing operations, and System 34 needles for leather work (needle size up to

machines

use

System

332Rneedles

for ordinary

operations, and System 332Lror 332 D needles for

leather

work.

(Additional needle

on

page

60).

'V32"

to Vb", or 15 to 16 mm (on

foot lift ranges from "/as" to

1Vib",or36 mm

Va",

or

22 mm

ModelsAand Bare used for

materials.

systems

thot may be used are listed

earlier

machines the

'V32",

or 9 to 10

light-

to medium-weight

mm).

Model C is used for heavyweight materials (machine features higher needle bar rise and larger take-up

motion).

a. Purpose of Employment

The

Pfaff

seaming

3334isspecially

operationsofevery

designed

description.

for

While

automatic

both

bartacking

the

shape

and short

of the

tack

and the number of stitches per tock ore predetermined for each subcloss, the

sizeofmost

tacks

canbevaried

within

certain

limits.

The machine's field of application embraces oil branches of the sewing indus

try.

Thus,

opart

from

bartacking, it may be

seams,

attaching

justa few additional applications. (See ill.on page 7).

belts

and straps, and

employed

stitching

for

arnamentol

stitching

tacks,

staying

to name

The Pfaff

greatly facilitates the

cles

If desired, the Pfaff 3334 automatic bartacker can be fitted with electro

magnetic

or Pfaff 3334X45 in Model C. On this machine, the functions of raising the

work clomp and storting the

treadles of the standard model ore replaced by a foot switch (Fig. 4).

Feed

The work is held between, and guided by, the work clamp and the feed

plate. To produce the desired

machine bed while the needle moves up and down. The feed motion is deriv

ed

The Pfaff 3334 attains a speed of up to

thickness of the material as well os the size

the machine from one subclass to another, it

exchange the feed plate and the clamp feet rather than the complete work

clamp.

are

being stitched.

control,

Motion

from

the

3334

is of the cylinder-bed construction.

feed

this

com.

handling

version

of the

being

machine

tack,

knownasPfaff

are performed by solenoids, and the two

the material is

work,

Its

slender cylinder arm

particularly

when

3334X35inModels

moved

up and across the

1,200

s.p.m., depending on the

and

shape

of the tack. To convert

will

be sufficient normally to

tubular arti

Aand

B,

If,

however, the shape and size of the tack or the number of stitches in the

design

ore to be changed, the feed cam,

have

to be exchanged.

knife

cam,

worm

and

worm

wheel

b. Application Possibilities

Fig. 1

2.

Operation

a. Efficiency Rating

The output of on automatic bartacker is determined by the following factors:

(1)

the number of stitches

(2)

the

handling

times

per

involved

tack,

in a

given

operation

(which,inturn,

are de

termined by the size and bulkineess of the workpiece),

(3)

the quality of material

(4}

the handy arrangement of the work, and

(5)

the

speed

of the machine.

The

Pfaff

3334

automatic

21, 24, 28,

32, 36,

42,

contained in the Subclass Catalogue (Form No.

lity

of this efficient

and

thread,

48,

bartacker

56,

and 72

can

stitches

machine.Inspecial

be

fittedtomoke

per

tack.

The

tack

10080)

illustrate the versati

coses,

it may be advisable to sub

7, 9, 14, 16, 18,

design

diagrams

mita sample of the moterial to be sewn as wellas a specimen of the finished

work

eithertothe

Pfaff industrial

Kaiserslautern

sewing

machine

BranchofG.M.

representative.

Pfaff

AGorthe

nearest

b. Mode of

Operation

While both the length and width of a bartack con be varied within certain

limitsbysimply

adjusting a lever, its shape as well as the number of

stitch

es it comprises can be varied only by exchanging the feed cam.Inmany

instances, the worm gear assembly and the knife cam must be exchanged

in

addition.

The entire sewing action, including the stopping of the

automatically.

The machine is equipped with two cams which ore corried on a joint trans

verse

shaftoneither

sideofthe

machine

arm.

machine,

is controlled

The right, or feed, cam has two pattern-forming grooves, one on each side.

While the groove on its outside face controls the crosswise feed

motion,

the lengthwise feed motion emanates from the groove on its inside face.

The feed cam, in addition, carries

one

or several stop tripping segments as

well as one or several thread nipper tripping segments. Whereas the former serve to stop the machine at the completion of a sewing cycle, the latter

actuate

The number of stop tripping segments and thread nipper tripping segments

the

thread

nipper.

provided on the rim of the feed cam depends on the number of tacks pro

duced

per

cam revolution.

The left,or knife, cam operates the needle and bobbin thread

knives.

As the knives swing forward from the inoperative to the stand-by position,

a sufficient

whichtostart

amountofthread

the

is pulled from the spool

and

the bobbin with

As the machine makes the last stitch of the tack, the

couses the lower, or main, tension to be

releasedsothat

groove

in the knife cam

the

last

stitch knot

is pulled ino the material.

The main tension will not by reactivated until the machine, depending on the

subclass, has completed

three

to four stitches

after

starting a new tack. In this way, puckering of the fabric is successfully eliminated. This is particularly important for stitching

The machine is

delicate

started

the stop motion lever to swing back

interlocked.

The locking lever prevents the

clamp

while the machine is in

knivestotrim

By the

roised.

When

the

threads.

same

token, the machine

the machine is

started,

fabrics or sewing with long stitches.

by depressing the right treadle. This action causes

and

the tripping

operator

operation

from inadvertently raising the work

since this action would cause the

cannotbestarted

and

locking levers to be

while the work clamp is

the driving belt is shifted from the idler to the

driving pulley and, conversely, when the machine stops, it is returned from

the driving to the idler pulley.

All the

operator

has to do to start the sewing cycle is to press down the right

treadle. After the machine has stopped automatically, she raises the work

clompbydepressing

the

left

treadle.

c. Sewing

The work is held between the work clamp ed

after

Cycle

each stitch to form the

and

predetermined

the feed

plate

andisadvanc

tack design. This design is

produced by moving the material up and across the machine bed as the

needle moves up and down. Fig. 3 illustrates the sewing cycle of a rectang

ular

tock.

When the machine has been started by depressing the right treadle, the

needle

enters

the

fobric

for

the

first

stitch.

After

the

first

stitch

has

been

completed and the needle has risen clear of the fabric again, the work is

moved across the machine bed the predetermined distance between stitches.

This cycle is

repeated

until the tack is completed.

1 ==

Needle

2 =

Needle

3 =

Work

4 = Clamp foot lifting lever 5 = Thread wiper wire

6 = Feed plote

7 = Work clomp feet

8 =

Presser

9 — Presser bar lifting bracket

bar

clamp

bar

frame

Fig. 2 Feed

While the last the

machine

the

last

stitch.

When the left treadle is depressed, the needle

med and the work clomp raised for easy removal of the work.

Electromagnetic Control

stitch

stops

is being

exactly

plate

and

work

formed,

the stop

in the predetermined

clamp

motion

position

and

bobbin threads

is released so that

after

completing

are

trim

On machines fitted with electromagnetic control, various operations that

used to be performed by hand or foot

clomp and starting the

3334,

the

solenoids

on

the

foot

rest.

When

this

buttonispressed

is

lowered

onto the

indefinitelybydepressingorreleasing

machine,

ore

activatedbydepressing

down

goods.Atthis

previously,

suchasraising

the work

are controlled by solenoids. On the

to the

first

stage, the

push-button

switch

position,

work

clamp

the

switchFS(Fig.

mayberaised

push

button,asmay

the

work

Pfoff

clamp

or be

required to odjust the position of the work under the clamp. Depressing the

button to the first switchposition will not start the machine.

4)

Only

when

the

button

is depressed to the second

machine be storted by a second solenoid

10

(Fig.

4).

switch

position

will

the

Crosswise

motion

begins

Schematic Seam Construction

13

U

11<^^2r-2-^7

10

9 8

Crosswise

completed

Work

clomp

Feed

Diagram

motion

piece

plate

Lengthwise motion

begins

Crosswise

motion

begins

Lengthwise motion

begins

Crosswise

motion

begins

Fig.3 The individual phases of sewing a four-sided tack

Lengthwise motion

completed

Crosswise

motion

completed

Lengthwise motion

completed

Crosswise

motion

completed

1

—1—1

lall

iiaHiiiH;HiK|^88|i88s

g

11

12

Fig.4Pfaff

3334

X35or X45fitted

with

electromagnetic control

3.

Mechanical

Setup

From the foregoing description of the sewing action of a bortocker it is evident that this machine must incorporate the following essential mechanisms, in

addition

to the shuttle

and

needle

bar

drive mechanisms found in

any

ordinary

sewing machine:

(1)

a special feed

termined

(2)

an automatic stop control which stops the machine as soon as the predeter

mined number of stitches

direction

mechanism

offer

each

which

advances the workpiece in the prede

stitch,

have

been

mode

and

the take-up lever has

almost reached the highest point of its stroke, and

(3)

a trimming mechanism whichsevers the needle and bobbin threads.

a.

Shuttle

and

Needle

Bar

Drive

The shuttle driving motion is derived from the cranked arm shaft and trans

mitted to the shuttle via a connecting rod, an oscillating rock shaft, a crank with slide block, end the shuttle driver shaft. This mechanical setup produces the oscillating motion required for this type of shuttle.

The needle

the needle

b.

Feed

bar

is moved up and down by means of the needle

bar

connecting link.

Motion

bar

crank and

The feed motion lengthwise and across the machine bed is controlled by

two pattern-forming grooves, one on either face of the feed cam.

Whenever the material is to be moved in a stroight line lengthwise or across

the machine bed, this motion is controlled by only one of these grooves.

The feed motions emanating from both grooves

are

combined to produce

circular, triangular or other tacks whose sides extend at on angle to the true

lengthwise or crosswise direction of feed.

The groove on the outside face of the feed cam controls the feed motion

crosswise of

the top end of the feed across regulator

and

transforms the throws

the

machine

bed.Asthe

emanating

feed

cam

revolves, o

(Figs.

6 &7}rides in this groove

roller

located

from its curvature into a reciprocating

motion which is transmitted to both the feed plate carrier bar and the work clomp by means of a ball joint connection. The amount of motion across

the machine bed can be adjusted by changing the position of the ball joint

connectioninthe

slot of

the

feed

across

regulotor.

at

13

1 =

Idler

2 = Driving

3 =

Hinge

4 =

Hinge

5 =

Oscillating

rock

6 =

Shuttle

shaft

7 =

Slide

8 =

Shuttle

shoft

9 =

Shuttle

10 =

Shuttle

11 =

Shuttle

12 =

Bobbin

13 =

Take-up

14 =

Arm

15 =

Shuttle

connecting

rod

16 =

Needle

17 =

Needle

connecting

stud

18=Needle

connecting

link

19 =

Hinge

20 = Take-up

link

21 = Take-up

22 =

Needle

crank

pulley

shaft

crank

block

shaft

pulley pin screw

driver

driver race

case

crank

drive

bar

lever

bar

nsi

1 4 1

—

'-^1

\ 1

1

6 ;

1

Fig. 5 Shuttle

and

needle

bar

drive

1 =

Arm

shaft

2 =

Feed

cam

driving

worm

3 =

Idler

pulley

4 = Driving pulley

5 =

Feed

com

6 —

Worm

wheel

7 =

Bearing

bracket

8 =

Guide

plate

9 =

Slide

block

10 =

Hinge

screw

11 =

Feed

across

shaft

12 =

Feed

across

shaft

crank,

front

13 = Hinge stud

14 =

Guide

plate

15 =

Feed

across

driving block

plote

carrier

connection

Feed

regulator

plate

bar

across

16 = Feed

17 = Feed

18 = Ball joint

19 =

V

\

\ 1

\

V

\

Fig.6Feed

across

motion

(longitudinal

section)

] =

2 =

Roller

stud

3 ~ Feed across 4 = Boll screw stud,

5 =

Hinge

6 = Ball joint connection

7 = Boll stud,

8 =

Feed

9 = Feed across shaft crank,

rear

stud

across

regulator

lower

shaft

Fig.7Feed

The

groove

lengthwiseofthe

a

reciprocating

regulator has a slot

regulator

connectedbyo

regulating

the

effective

is

moved

possibletoadjust

bor.

on the

post.

screw.

armofthe

upward,

inside

machine

motiontothe

milled

Both

the

swivel

The

more

the smaller

the

amountoflengthwise

upper

across

motion

(cross

section)

face

of the

feed

cam

controls

bed.Aroller

fwo-ormed

into

its

feed

regulator

back

which

feed

side

and

ridesinthis

regulator

which

the

(Figs.8&9).

accommodates the feed

feed

regulator

(Fig.8)whichisheldinplacebya

this

swivelismoved

feed

regulator.

willbeits

And,

downward,

conversely,

effective

travelofthe

orm.

the

This

feed

the feed

groove

clamp

the

larger

more

device

plate

imparts

The

post

will

the

makes

carrier

motion

feed

are

and

be

swivel

a

it

Since

both

the

plate

carrier

bor

moved positively

16

work

and

from

clomp

and the feed plate are

the

workpieceisheldinplace

one

stitch

position to the next.

mounted

between

on the feed

these

parts,itis

1 = Feed

2 =

plate

Feed

across

driving

block

3 =

Slide

block

4 =

Feed

plate

carrier

bar

5 = Feed regulator post 6 = Work

clamp

7 = Feed regulator

swivel

8 = Swivel

9 = 10=Worm 11 =

Feed

Worm

clamp

cam

wtieel

wheel

12 = Driving pulley

13

Idler pulley Feed cam driving

14

worm

Arm

15

16

shaft

Feed regulotor

Fig.

8 Feed lengthwise motion (longitudinal section)

1 —

Feed

cam

2 =

Roller

stud

3 =

Roller

4 = Feed regulotor 5 = Bearing bracket

6 =

Slide

block

7 =

Guide

plate

8 ~ Feed plate

9 = Swivel

10 =

11

= Feed regulator swivel

12 =

13=Worm

14=Worm

Thumb

Feed

clamp

screw

regulator

wheel

post

shaft

15 = Feed cam driving worm

16 =

Arm

shaft

Fig.9 Feed lengthwise motion (cross section)

The adjustment possibilities inherent in the feed regulator and feed across

regulator ore not sufficient to produce larger tacks. Such tacks, however,

can be made with the aid of special organizational parts

which

provide for

a larger amount of work clomp travel lengthwise and ocross the machine bed.

c.

Automatic

Stop

Motion

The machine is stopped automatically in order to ensure that all tacks will

be sewn with exatly the some number of stitches and that the machine will

always

be in the same

position

whenanew

needle

cycle

begins.

The

shape

of the pattern-forming groove and the gear ratio of the worm gear ossem-

bly are determined by the number of stitches per tack.

The automatic stop

rim of the feed cam

motion

(Fig.

is operated by the stop tripping segment on the

10).

When this tripping segment depresses the trip

ping lever, the latch at the lower end of the stop motion lever slips out of the

catch on the tripping lever so that the stop

motion

lever can be pulled against

the stop com by a tension spring. Shortly before the stop com has completed

its last revolution, the stop link hits its surface and snaps into its groove, there

by causing the machine to stop. To

thissudden stop, the Pfaff

3334

absorb

isequipped

the momentum of the machine at

with

double buffer springs.

18

t.

Fig.10 Automatic stop motion mechanism

1 =

Stop

cam

2 = Hinge stud 3 = Stop motion lever 4 = Stop link 5 = Tripping lever 6 = Stop link rod

7 =

Latch

8 =

Catch

9 = Tripping dog

10 = Hand stop lever plate

11 =

Stop

tripping

segment

As the stop cam

end of the broke lever engages the face of the

lating port of the

makes

machine's

its last half

momentum

revolution,

the broke driving

before it isstopped.

At the same time, the belt shifter moves the driving belt

to the idler pulley (Fig. 11).

block

pulley,

from

at the top

thus

annihi

the driving

19

If trouble should occur while the machine is in operation, it can be stopped

instantly by depressing the hand stop lever (Fig. 10). This is important in case of needle or thread breakage.

Operative

1 =

Motor

2 = Motor pulley 3 = Driving belt

4 =

Belt

shifter

d.

Thread

On and

20

Trimming Action

completion

bobbin

thread

of the

knives

position

sewing

which

Fig. n

action,

Machine

5 -

6 =

7 = Driving pulley 8 = Idler pulley

both

threads

are

located

Inoperotive

drive

Stop

motion

Broke

lever

are

under

the

position

lever

trimmed

needle

(idling)

by the needle

plate.

The motion which causes the knives to swing forward and catch the threads

emanates from the knife cam

bar

tripping lever

and

the knife

and

is transmitted to the knives by the knife

bar

(Fig. 12).

Fig.12 Thread trimming mechanism

bar

1 = Knife cam positioning flange 6

2 = Lifting lever 7

3 =

Knife

cam

4 =

Knife

bar

5 = Knife

The

needle

bar

tripping fork 10

and

bobbin

threads

are

Knife

Bearing bracket Ball joint connection

8

Locking lever

9

Bracket

cut when the left

tripping lever

treadleisdepressed.

A detailed description of the thread trimming action is given below:

While the last stitch is being made, the knife cam causes both knives to

swing

forward from the inoperative to the stand-by position.

motion

pulls

the tip of the needle thread knife catches the needle thread and

it onto the

back

edge of

its

blade

(Figs.

13 &

14).

The

During

bobbin

this

thread

Is caught by the bobbin thread knife in the same manner.

21

When the left treadle is pressed down, both knives continue to swing forward,

and

the

needle

tapering back

thread

edge

loop

and

of the respective knife and

the

bobbin

thread

are

cut.

are

pulled

onto

the

When the treadle is released, the knives return to the stand-by position where they remain during the first four stitches of the next tack. At the completion

are

of these stitches they

by the knife

cam.

automatically returned to the inoperative position

'/32"-Vl6"

7-8mm

Needle

Edge of

Bobbin

thread

knife

shuttle

knife

race

Fig. 13 Inoperotive position of knives

Needle

22

Bobbin

thread

Fig. 14

Stand-by

position of knives

18 19

20

21

63

22

62

23 24

58

61

60

57

56

55

54

53

52

51

50

49

0

29

25

26 27 28

30

Fig. 15

A = Starting lever F = Starting lever regulating nut B = Hand stop lever G = Thread

nipper

regulating screw

C = Feed across motion regulating nut H = Brake lever regulating screw

(Drops indicate oiling points]

-

1

Hinge

stud

2 = Face

=

3

4

:

5

=

6

=

7 8 =

=

9

=

10 11

=

12

=

13

=

14

=:

15

16

17

—

18

—

19

=

20 21=Set 22

=

23

=

24

=

25

plate

Take-up Take-up

Needle

Needle Needle

lever link crank

bar

connecting link

bar

connecting

bar

frame

bar

Thread nipper rod extension

Thread Thread

Feed

nipper wiper

plate

Thread trimming mechanism

Needle

Knife

Bobbin

Shuttle

Shuttle Shuttle

Feed

Shuttle

collar

across

bar

race

race driver

driver

plate

case

ring

shaft

Ball joint connection

lever

wire

shaft

crank,

stud

front

Bearing bracket

26

-

27

= Feed

=

28

=

29 30

=

31

32

= Bearing bracket

33

=

34

35

=

36

37

38

= Bearing bracket

-

39

=

40

=

41

=

42

43

=

44

=

45 46

=

47

=

48

49

=

50

regulator

Slide

block

Shuttle

driver

Oscillating

rock

Shuttle drive connecting rod

Hinge

stud

Stop

motion

Oscillating

rock

Tripping lever latch

-

Tripping lever

Hinge

stud

Felt

washer

Brake

lever

Hinge

stud

Stop

motion lever

Check

block

Brake

•

block

Brake regulating bracket

Positioning pin

Stop

com

Stop

com

spring

Driving pulley

shaft

lever

shaft

catch

shaft

crank

hinge

51 =

52 53 54 55 56

57

58 59

60 61

62 63

64

65

66

67 68

69 70 71

72 73

74

75 76

=

_

=

•

Thread

Arm

nipper

shaft

w/ position pin

hinge stud

55

54

53 52

51

50

49

48 47 46

45

44

15

16

43

17

62

61

58

18 19

59.60

20

40

39

21

22

23

24

25

Fig.16 D = Feed lengthwise motion regulating screw

E = Chain suspension hook

Work

clomp

foot

K =

pressure reguloting nut

(Drops indicate oiling points)

1

End

screw

=

2

Stop

motion

connection

w/circiip

bar

tripping

spring

bar

tripping fork

bracket

plate plate

regulator

across

shaft

across

shaft

across

shaft

lever

post

crank,

=

3

Locking lever

4 Spring suspension bracket

:

5

Boll joint

=

6

Washer,

7 =

Hinge stud

=

8

Bearing bracket

=

9

Knife

=

10

Stop link rod

=

11

Pressure

_

12

Knife

—

13

Position

14

Starting lever

15

Guide

16

=

Guide

17

Feed

18

Feed

19

Feed

=

20

Feed

=

21

Driving stud

=

rear

front

22

Feed

=

plate

w/position

23

Position bracket, front

=

24

Shuttle

race

25

Cylinder arm

26

Cylinder

-

27

Knife

=

28

Thread

29

Work

=

30

Thread

=

31

Clamp

.

32

Work

=

33

Work

=

34

Presser

35

Presser

36

Lifting

=

37

Presser

=

38

Pressure regulating screw

=

39

Oil

40

Lifting bracket

=

41

Lifting lever

arm

bar

trimming mechanism

clamp

wiper wire

foot

clamp

bar

brocket

bar

tube

corrier bar.

ring

cap

spring

cap

foot

lifting lever

foot lifting stud

face

plate

lifting bracket

link

spring

guide

42

=

Hinge

stud

43

Top

cover

=

44

Thread nipper hinge stud

45

= Knife cam positioning flange.

adjustable

=

46

Knife

cam

=

47

Lifting lever

48

Ball joint

=

49

Lifting lever

=

50

Bracket

51

Belt

=

52

= Idler pulley

53

=

54 55

56

57

58

=

59

=

60

61 Ball joint connection 62

shifter

Driving pulley

=

Stop Hinge

Bracket

=

Bearing bracket

—

Feed

Work

Pressure spring

Swivel

guide

connection

extension

com

stud

regulator

clamp

37 36

32

31

30

29

28

27 26

25

24

23 22

12

Fig. 17

1 =

Needle

2 = Face

3 =

Take-up

4 =

Thread

5 =

Arm

6 = Ball joint

7 = Ball screw stud,

8 — Bearing brocket 16 =

9 =

Rollers

10 = Feed across

3 4

plate

tensions

shaft

lever

connection

upper

regulator

Feed

11 = 12 =

13 =

14 =

15 =

17

18 =

=

regulator

Worm

wheel

bracket,

Worm

shaft

front

wheel

Feed cam position stud 23

Shuttle

drive

rod Feed

Tension

Brake

cam

connecting

spring

block

shaft

10

bearing20

11

12

19

Broke

Stop

21

Stop motion lever

22

Ball joint Tension Locking lever

24

Lifting lever stop

25

Bracket

26

Bearing bracket

27

Knife

28

13

lever

link

connection

spring

bar

tripping lever

14

15

{Drops indicate oiling points)

16 17 18

29 = Knife

30 =

31 =

32=Knife

flange,

Worm

bracket,

Worm

cam

positioning

adjustable

wheel

rear

wheel

cam

shaft

33 = Lifting lever 34 = Hinge stud

35 —

Thread

nipper

rod

36 = Lifting bracket link

37=Presser

bar

bearing

Fig. 18

(Drops indicate oiling points]

40

39

-^38

-37

-36

-35

"34

"33

-32

-31 30

-29

-28

-27

-26

-25

-24

-23

-22

-21

-20

-19

=

Needle

1

=

2

Lifting lever

=

3

Worm

-

Lifting lever

4

Lifting

5

----

6

Boll

7

Presser

=

8

=

9

Bearing

=

10

Needle

11

Knife

12

Presser

13

Thread

Clamp

14

--

15

Knife

--

16

Knife

=

17

Knife

—

18

Shuttle

19

Shuttle

20

Shuttle

-

21

Bobbin

22

Ball joint

23

Thread

24

Hand Bearing

25

26

Hinge stud

-

27

Feed

=

28

Ball screw stud,

--

29

Feed

30

Feed

-

Tension

31

32

Worm

33

Thread tension, complete

=

34

Feed

=

Tension

35

=

36

Thread

37

Thread

-

38

Thread

=

39

Regulating screw

Take-up

40

bar

frame

guide

wheel

bracket

joint

connection

bar

lifting

Knifecam positioning flange,

bracket

bar

cam

bar

nipper

foot

lifting lever

bar

tripping lever

bar

tripping

bar

race

ring

driver

case

connnection

wiper

stop

lever

bracket

across

regulator

across

regulator

bracket

wheel

cam

spring

tension,

nipper nipper

lever

shaft

bearing

link

bracket

fork

wire

wing nut

upper

shaft

upper,

tripping

complete

segment

tripping lever

bracket

adjustable

Pfaff 3334 Service Manual

Specifications and Main Features

Frequently Asked Questions

User Manual