Pfaff 441-O Manuale utente

®442-R

441

-O

442-0

Service

Manual

Pfaff, D

6750

Kaiserslautern,

Postfach

3020/3040,

Telex:

045753

From the library of: Superior Sewing Machine & Supply LLC

Important

note:

ThisServiceManual applies also to the Raff 441-0 and 442-0. Deviations in the illustrations do not

affect

the

adjustment of the machines.

The

Sen/ice

Manual is

based

on a two-needle machine.

When adjusting a single-needle machine,

simply

ignore the adjustment procedure for the left

needle and the left sewing hook. A separate Service

Manual

is available for adjusting the

Pfaff

441-R

(0)-705/03: -755/03.

Tools,

gauges

and

other

items required for adjusting

Raff

machines

442-R, 441-0

and

442-0

set

screwdrivers

with

blades

from

wide

set

ofwrenches withopeningsfrom 7 to 14 mm wide

set

of alien keysfrom 2 to 6 mm

1feed dog

gauge,

part No.

91-129995-05

1adjusting

gauge,

part No. 91

-129573-91

1C-clamp,

part

No.

880137/00

metal

rule

1wrapper of needles: system 134 (for7 mmfabric clearance)

system

134-35

(for 9 mm fabric clearance)

2strips of white

paper

Sewing thread and testing material

Technical

data

Maximumsewing

speed:

5000 s.p.m.

Balance

wheel:

eff.

dia.

Drive:

clutchmotor0,550 kW(% HP)

lever-operated Stop motor0,550 kW(% HP)

electronic-stop-motor 0,550 kW(%HP)

Needle system: 134 (for7 mmfabric clearance)

134-35

(for 9 mm fabric

clearance)

Fabric

clearance:

From the library of: Superior Sewing Machine & Supply LLC

Correct

setting:

Scale

ring

reverse-feed

control

With the stitch length

set

"0",

the

"0"

mark on scale ring 3 should be opposite

mark

1.0.1

1.1

Take

the

needles

out

the

needle

holder.

1.2

Remove

the

knee

levertogetherwith its coupling

sleeve.

1.3

Tum

knurled

disc

far

it will

the

direction in which

the

reverse-feed

control

starts

move

downwards.

1.4

Loosen

screw

and

turn

scale

ring

3until

the

"0"

mark

opposite

mark

1.5

Inthis position, tighten

screw

From the library of: Superior Sewing Machine & Supply LLC

Correct

setting:

Zeroing

the

bottom

feed

The

feed

dog

must

not

move

forward

when

you turn

the

balance

wheel

with

the

stitch length

set

"0".

2.0.1

2.1

Remove

the

left

upper

plastic plug on

the

back

the

arm

standard.

2.2

Unscrew

the

gearcase

cover

the

underside

the

machine

base

(collecting

the

oil, if

any,

in a container).

2.3

Loosen

screw

the

counter-balance.

2.4

Make

sure

the

stitch length is

set

"0",

then

loosen

both

clamp

screws

2 (Fig. 2.0.1)

just

sufficiently to allow

crank

3 to

turned

its

shaft

against

resistance.

From the library of: Superior Sewing Machine & Supply LLC

2.5

Tofacilitateadjustment,insertascrewdriverinthe slot offeed rock shaftcrank4 (Fig.2.0.2).

2.0.2

2.0.3

2.6

Turn

the

balance

wheel

and

simultaneously

adjust

rod

5 (Fig. 2.0.3)

connected

crank

3 (Fig. 2.0.1) until

the

feed

dog

(or

rather

the

screwdriver

the

feed

rock

shaft

crank)

completely

motionless.

2.7

Inthis position, tighten both

clamp

screws

securely.

2.8 Leave the screwdriver in the slot of

feed

rock shaftcrank 4 (Fig. 2.0.2) for

the

subsequent

adjustments.

2.9

Check

this

adjustment

(see

"Correct

setting").

From the library of: Superior Sewing Machine & Supply LLC

Correct

setting:

3.0.2

Bottom

feed

driving

motion

With the machine

set

for its longest stitch and the needle bar positioned at bottom

deadcenter, the feed dog should not move when the reverse-feed control is operated.

3.0.1

3.1 Loosen both screws 1 (Fig. 3.0.1) Infeed driving eccentric 2 just sufficientlyto allow the

eccentric to be turned on its shaft against resistance.

3.2

Bring

the

needle

bar

to bottom

dead

center.

3.3 Pushthe C-clampontothe needlebar,push itupagainstthe needlebarframeandtighten

its

screw.

3.4

Set

the

machine for its longest stitch.

3.5 Movethe reverse-feed control up and down and simultaneously turn feed driving

eccentric 2 until its notch (see arrow in Fig.3.0.1) is visible and the feed dog (or

rather

the

screwdriverin feed rock

shaft

crank3) is completely motionless.

3.6 Inthis position, securelytighten the accessible screw 1.

3.7

Remove

the

C-clamp

from

the

needle

bar.

3.8

Also tighten

the

second

screw

3.9

Pull

the

screwdriver

out

the

slot

feed

rock

shaft

crank

3.10 Check this adjustment (see "Correct setting").

From the library of: Superior Sewing Machine & Supply LLC

Correct

setting:

Lower

needle

bar

driving

crank

With the stitch length

set

at "0", the flat surface of lower needle bar driving crank 4

should

positioned that its

edge

is parallel to

the

edge

the

bedplate.

4.0.1

4.0.2

4.1

Take

out

screws

1 of clip bracket 2

and

remove

the

bracket.

4.2

Set

the

machine for its longest stitch.

4.3

Loosen

screws

4.4

Set

the

stitch length at

"0".

4.5 Turn lower

needle

bar

driving

crank

that

the

edge

of its flat

surface

is parallel

the

edge

bedplate.

4.6 Inthis position,tighten the accessible screw 3.

4.7 Againset the machineforitslongeststitchand tightenthe second screw3,too.

4.8 Replace bracket2

and

tighten

screws

From the library of: Superior Sewing Machine & Supply LLC

Correct

setting:

5.1

5.2

5.3

5.4

Counter-balance

With

the machine set for its longest stitch, counter-balance 2 should move freely

when

the reverse-feed control is operated.

5.0.1

Set

the

machine for its longest stitch.

Makesure screw 1 ofcounter-balance2 is loose (Fig.5.0.1), move the latteras faras it

will

go, turning itinthe direction indicated by an arrow.

Turnthe counter-balancebackbyabt.1 mmagain, and inthis

position

tighten

screw1.

Check this adjustment

(see

"Correct setting").

From the library of: Superior Sewing Machine & Supply LLC

Correct

setting:

6.1

6.2

6.3

6.4

6.5

6.6

6.7

6.8

6.9

Bottom

feed

lifting

motion

When the needle bar is at bottom

dead

center, the feed dog should be at its

highest

point.

Set

the

stitch length at

"0".

Loosen

clamp

screw

Turn out

screw

3 incollar 2 by half a turn.

Insert ascrewdriver in

the

slot of bottom

feed

lifting

crank

and

bring

the

needle

bar

bottom

dead

center.

Push

the C-clamponto

the

needle

bar, push itup

against

the

needle

bar

frame

and

tighten

its

screw.

Turn

coiiar

the

collar

the

lifting

eccentric

until

the

feed

dog

(or

screwdriver)

bottom

dead

center.

Inthis position, tighten clamp

screw

Remove the C-clampfrom

the

needle

bar

and

tighten

screw

Pull

the

screwdriver

out

the

slot

of bottom

feed

lifting

crank

and

check

this

adjustment

(see

"Correct

setting").

From the library of: Superior Sewing Machine & Supply LLC

Correct

setting:

7.1

7.2

7.3

7.4

7.5

7.6

7.7

Note:

Clearance

between

presser

foot

and

needle

plate

Withpresserbar lifter1 raised, there shouid be a ciearance of7.0 mm (needie system

134) or 9.0 mm (needle system 134-35) between presserfootand needle plate.

7mm(9mm)

Take

out

the

two

screws

the

face

cover

and

remove

the

latter.

Unscrew

the

cover

the

back

the

machine

arm.

Raise

presser

bar lifter1 and screw on the

presser

foot.

Loosen both

screws

2 inthe

presser

bar collar.

Push the 7-mm (or9-mm)thickpart ofthe gauge under the presserfootso that itsrecess

faces downwards (Fig.7.0.1).

Push the presserfoot downonto the gaugeand adjustItlaterally

that its

sides

are

parallel to

the

edges

the

needle

plate

slot.

Inthis position, tighten both screws 2.

Adjust

the presser footpressure by

turning

regulating

screw4

(Fig.

9.0.1)inor outwhen

you

make

asewing test.

From the library of: Superior Sewing Machine & Supply LLC

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