Pfaff 442-R, 441-0, 442-0 Service Manual

®442-R

Service

441 442-0

Manual

-O

Pfaff, D

6750

Kaiserslautern,

Postfach

3020/3040,

Telex:

045753

Important

note:

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

affect

the

When adjusting a single-needle machine,

adjustment of the machines.

needle and the left sewing hook. A separate Service

Pfaff

441-R

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

Tools,

gauges

and

other

items required for adjusting

setofscrewdrivers

set

ofwrencheswithopeningsfrom 7 to 14 mm wide

set

of alien keysfrom 2 to 6 mm

1 feed dog

1 adjusting 1 C-clamp,

metal

gauge,

part

rule

with

part No.

part No. 91

No.

880137/00

blades

from2to10mm

91-129995-05

-129573-91

The

Sen/ice

simply

ignore the adjustment procedure for the left

Raff

wide

Manual is

based

Manual

machines

on a two-needle machine.

is available for adjusting the

442-R, 441-0

and

442-0

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

system

134-35

(for 9 mm fabric clearance)

2 strips of white

paper

Sewing thread and testing material

Technical

Maximumsewing

Balance

Drive:

data

speed:

5000 s.p.m.

wheel:65mm

eff.

dia.

clutchmotor0,550 kW(% HP)

lever-operated Stop motor 0,550 kW(% HP)

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

Needle system: 134 (for7 mmfabric clearance)

134-35

Fabric

clearance:7or9mm

(for 9 mm fabric

clearance)

Scale

ringinreverse-feed

control

Correct

setting:

With the stitch length

mark

1.0.1

setat"0",

the

"0"

mark on scale ring 3 should be opposite

1.1

1.2

1.3

1.4

1.5

Take

the

needles

outofthe

Remove

Tum

startstomove

Loosen

the

knurled

screw2and

knee

levertogether with its coupling

disc1as

downwards.

Inthis position, tighten

needle

holder.

farasit willgoin

turn

scale

ring

screw

the

3 until

the

sleeve.

direction in which

"0"

markIsopposite

the

reverse-feed

mark

control

Zeroing

the

bottom

feed

Correct

setting:

The

feed

stitch length

dog

must

setat"0".

not

move

forward

when

you turn

the

balance

wheel

with

the

2.1

2.2

2.3

2.4

2.0.1

Remove

Unscrew

any,

Loosen

Make

the

left

upper

the

gearcase

in a container).

screw1of

sure

the

stitch length is

sufficiently to allow

plastic plug on

coveronthe

the

counter-balance.

crank

3 tobeturnedonits

undersideofthe

setat"0",

the

backofthe

then

loosen

shaft

arm

machine

both

against

standard.

base

clamp

screws

resistance.

(collecting

2 (Fig. 2.0.1)

the

oil, if

just

2.5

Tofacilitateadjustment, inserta screwdriver in the slot offeed rock shaft crank4 (Fig. 2.0.2).

2.0.2

2.6

2.7

Turn

the

crank

balance

3 (Fig. 2.0.1) until

crank)Iscompletely

Inthis position, tighten both

wheel

motionless.

and

simultaneously

the

feed

clamp

2.8 Leave the screwdriverin the slot of

adjustments.

2.9

Check

this

adjustment

(see

"Correct

2.0.3

adjust

dog

(or

rather

screws2securely.

feed

rock shaft crank 4 (Fig. 2.0.2) for

setting").

rod

the

screwdriverinthe

5 (Fig. 2.0.3)

connected

feed

rock

the

subsequent

shaft

Bottom

feed

driving

motion

Correct

setting:

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-feedcontrol is operated.

3.0.2

3.0.1

3.1 Loosen both screws 1 (Fig. 3.0.1) In feed drivingeccentric 2 just sufficientlyto allow the

eccentric to be turned on its shaftagainst resistance.

3.2

Bring

the

needle

bar

to bottom

dead

center.

3.3 Pushthe C-clampontothe needle bar,pushitupagainstthe needle barframeandtighten

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, securely tighten the accessible screw 1.

3.7

3.8

3.9

Remove Also tighten

Pull

the

screwdriver

C-clamp

the

second

from

screw

outofthe

the

needle

slotinfeed

bar.

rock

shaft

crank

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

Lower

needle

bar

driving

crank

Correct

setting:

With the stitch length

shouldbeso

4.0.1

positioned that its

set

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

edge

is parallel to

the

edgeofthe

bedplate.

4.0.2

4.1

4.2

4.3

4.4

4.5 Turn lower

Take

out

screws

1 of clip bracket 2

Set

the

machine for its longest stitch.

Loosen

screws

Set

the

stitch length at

needle

the

edgeofbedplate.

bar

"0".

driving

and

remove

crank4so

that

the

bracket.

edge

of its flat

surface

4.6 Inthis position,tighten the accessible screw 3.

4.7 Againset the machineforits longeststitchand tightenthe second screw3, too.

4.8 Replace bracket 2

and

tighten

screws

is parallel

Counter-balance

Correct

setting:

With

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

when

the reverse-feed control is operated.

5.1

5.2

5.3

5.4

5.0.1

Set

the

machine for its longest stitch.

Makesure screw 1 ofcounter-balance 2 is loose (Fig.5.0.1), movethe latter as far as it

go, turning itinthe direction indicated by an arrow.

Turnthe counter-balanceback byabt. 1 mmagain,and inthis

Check this adjustment

(see

"Correct setting").

position

tighten

screw1.

will

Bottom

feed

lifting

motion

Correct

setting:

When the needle bar is at bottom

highest

point.

dead

center, the feed dog should be at its

6.1

6.2

6.3

6.4

6.5

6.6

6.7

6.8

6.9

Set

the

stitch length at

Loosen

clamp

Turn out

screw

Insert a screwdriver in

bottom

dead

center.

Push

the C-clamp onto

its

screw.

Turn

coiiar2on

isatbottom

dead

"0".

screw

3 in collar 2 by half a turn.

the

collarofthe

center.

Inthis position, tighten clamp Remove the C-clampfrom

Pull

the

(see

screwdriver

"Correct

outofthe

setting").

slot of bottom

needle

bar, push itup

lifting

screw

the

needle

bar

slot

of bottom

feed

lifting

eccentric

and

tighten

feed

crank4and

against

until

screw

lifting

the

needle

the

feed

crank4and

bring

bar

dog

check

the

needle

frame

and

(or

screwdriver)

this

adjustment

bar

tighten

Clearance

between

presser

foot

and

needle

plate

Correct

setting:

Withpresser bar lifter1 raised, there shouid be a ciearance of 7.0 mm (needie system

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

7mm(9mm)

7.1

7.2

7.3

7.4

7.5

7.6

7.7

Note:

Take

out

the

two

Unscrew

Raise

the

presser

Loosen both

screwsofthe

coveronthe

bar lifter1 and screw on the

screws

2 inthe

face

backofthe

presser

cover

and

machine

bar collar.

remove

arm.

presser

foot.

the

latter.

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

faces downwards (Fig.7.0.1).

Push the presserfoot downonto the gaugeand adjustItlaterallysothat its

parallel to

the

edgesofthe

needle

plate

slot.

sides

are

Inthis position, tighten both screws2.

Adjust

the presser footpressure by

you

make

a sewing test.

turning

regulating

screw4

(Fig.

9.0.1)inoroutwhen

Feed

dog

height

Correct

setting:

Withthe stitch length

setat"0"

and

the

needle

bar

positioned at bottom

dead

center,

the feed dog should be centered in its slots and contact the gauge throughout its

entire length (Fig. 8.0.2).

8.1

8.2

Set

Bring

the

stitch length at

the

needle

8.3 Loosenclamp

8.4

8.5

8.6

8.7

Place

and

Lower

Center

Push

the

its front

the

feed

machine feed

presser

screws

edge

feed

bar

"0".

bar

to bottom

dead

1 offeed liftingcrank 2

gaugesounder

is flush with

bar

doginits

upwardsuntil

lifterto

the

rest

slots.

the

center.

front

the

presser

feed dog

and

the

presser

edgeofthe

foot on

contacts

clamp

foot that its

needle

screws

the

3 offeed rock shaftcrank4.

recess

faces

plate.

gauge.

gauge,

and

hold itinthis position.

downwards

+ 23 hidden pages