Pfaff 441-O User manual
®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
1
set
of
screwdrivers
with
blades
from
2
to
10
mm
wide
1
set
ofwrenches withopeningsfrom 7 to 14 mm wide
1
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
1
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:
65
mm
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:
7
or
9
mm
From the library of: Superior Sewing Machine & Supply LLC
Correct
setting:
Scale
ring
in
reverse-feed
control
With the stitch length
set
at
"0",
the
"0"
mark on scale ring 3 should be opposite
mark
4.
1.0.1
1.1
Take
the
needles
out
of
the
needle
holder.
1.2
Remove
the
knee
levertogetherwith its coupling
sleeve.
1.3
Tum
knurled
disc
1
as
far
as
it will
go
in
the
direction in which
the
reverse-feed
control
starts
to
move
downwards.
1.4
Loosen
screw
2
and
turn
scale
ring
3until
the
"0"
mark
Is
opposite
mark
4.
1.5
Inthis position, tighten
screw
2.
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
at
"0".
2.0.1
2.1
Remove
the
left
upper
plastic plug on
the
back
of
the
arm
standard.
2.2
Unscrew
the
gearcase
cover
on
the
underside
of
the
machine
base
(collecting
the
oil, if
any,
in a container).
2.3
Loosen
screw
1
of
the
counter-balance.
2.4
Make
sure
the
stitch length is
set
at
"0",
then
loosen
both
clamp
screws
2 (Fig. 2.0.1)
just
sufficiently to allow
crank
3 to
be
turned
on
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
to
crank
3 (Fig. 2.0.1) until
the
feed
dog
(or
rather
the
screwdriver
in
the
feed
rock
shaft
crank)
Is
completely
motionless.
2.7
Inthis position, tighten both
clamp
screws
2
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.
J
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
1.
3.9
Pull
the
screwdriver
out
of
the
slot
in
feed
rock
shaft
crank
3.
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
be
so
positioned that its
edge
is parallel to
the
edge
of
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
3.
4.4
Set
the
stitch length at
"0".
4.5 Turn lower
needle
bar
driving
crank
4
so
that
the
edge
of its flat
surface
is parallel
to
the
edge
of
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
1.
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.
n
W
Set
the
stitch length at
"0".
Loosen
clamp
screw
1.
Turn out
screw
3 incollar 2 by half a turn.
Insert ascrewdriver in
the
slot of bottom
feed
lifting
crank
4
and
bring
the
needle
bar
to
bottom
dead
center.
Push
the C-clamponto
the
needle
bar, push itup
against
the
needle
bar
frame
and
tighten
its
screw.
Turn
coiiar
2
on
the
collar
of
the
lifting
eccentric
until
the
feed
dog
(or
screwdriver)
is
at
bottom
dead
center.
Inthis position, tighten clamp
screw
1.
Remove the C-clampfrom
the
needle
bar
and
tighten
screw
3.
Pull
the
screwdriver
out
of
the
slot
of bottom
feed
lifting
crank
4
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)
f
Take
out
the
two
screws
of
the
face
cover
and
remove
the
latter.
Unscrew
the
cover
on
the
back
of
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
so
that its
sides
are
parallel to
the
edges
of
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
This manual suits for next models
2
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