Pfaff 487 User manual

Service

Manual

PFAFF

INDUSTRIEMASCHINEN

GMBH

KAISERSLAUTERN

From the library of: Superior Sewing Machine & Supply LLC

Instructions

for

adjusting

the

Pfaff 487

Important

note

Never use a C-clamp on the needle bar of Pfaff 480

series

machines

because

this

would

damage

its

special

coating.

On machines which

are

put into operation for the first time or which have been idle

for a longer period of time

or 2 months) make absolutely sure to check the hook

lubrication

system

(Section

14).

Important

note

for

version

machines

All

adjustments described In this book also apply to version N machines (6.0 mm maximum ~ -

stitch length). An exception

are

machines supplied earlier whose stitch length control Is

knurled

all

the

way

around.

these

machines

the

reverse-feed

control

can

moved

when

the

stitch

length

control

set

at "0", all adjustments which are carried out with the stitch length

set

at "0" must

made

with

the

reverse-feed

control

depressed.

If on machines having a stitch length control which Is knurled all the way around the

reverse-feed control

cannot

be moved, all

adjustments

which have to be

carried

out

with

the stitch length

set

at "0" must be

made

with the stitch length

set

at "1.5" and the

reverse-feed

control

depressed.

Tools,

gauges

and

other

equipment

needed

for

adjusting

the

Pfaff 487:

set

screwdrivers

with

blades

from

wide

set

spanners

from

14 mm

wide

22-mm

spanner

set

alien

keys

ranging

from

1.5

to 6.0 mm

metal

rule

adjusting

pin, 5 mm dia.. No. 13-030 341-05

gauge.

No. 61-111

642-19

(gauge

foot

No. 61-111 639-20)

wrapper

with

System

134

needles

strip

white

paper,

sewing

thread

and

material

for

testing

purposes.

From the library of: Superior Sewing Machine & Supply LLC

1.1

Note:

Preparations

for

adjustment

Take

out

both

screws

the

face

cover

and

remove

the

cover.

The rnachlne can be blocked with the needle bar at different positions by

inserting a pin in one of the five holes of the bearing plate (Fig.

1.0.1).

After positioning the needie bar, push the pin into the appropriate hole

untii it enters the recess behind the bearing plate, thus blocking the

machine.

The

function

each

the

five

holes

follows:

Hole

1 (0.6 n.o.T.) = 0.6 mm

past

the

top

the

needle

bar

stroke.

This

hole

used

for

timing

the

feed

eccentrics

and

adjusting

the

feed

dog

height.

Hole

2(o.T.F.) =

top

take-up

lever

stroke.

(On

subcl.

-900

machines,

this

hole

used

for

timing

the

synchronizer.)

Hole

3 (0.6 n.u.T.) = 0.6 mm

past

the

bottom

the

needle

bar

stroke.

(This

hole

needed

Pfaff 481

and

485

machines.)

Hole

4(Schl-H 1.8) =

1.8

past

the

bottom

the

needle

bar

stroke.

This

hole

serves

time

the

sewing

hook

and

the

bobbin

case

opener.

Hole

5(o.T.N.) =

top

needle

bar

stroke.

From the library of: Superior Sewing Machine & Supply LLC

Correct

setting:

Note:

2.1

2.2

2.3

2.4

2.4.1

2.4.2

2.4.3

2.4.4

2.4.5

2.4.6

2.4.7

2.4.8

Zeroing

the

bottom

feed

motion

With the stitch length

set

at "0", the feed dog must not move when the

balance

wheel

turned.

The

bottom

feed

motion

can

also

zeroed

with

the

gearcase

closed

(see

Fig. 2.0.2).

Remove

the

needle

from

the

needle

holder.

Raise

the

presser

bar

lifter.

Remove

the

knee

lever

together

with Its

joint

and

tilt

the

machine

back.

Adjustment

procedure

applied

when

the

gearcase

open.

Turn

the

stitch

length

control

"0".

Take

out

the

screws

the

gearcase

cover

and

remove

the

cover

with Its

gasket,

making

sure

that

the

oil, If any, Is

drained

off into a container.

Take

the

oil

sponge

out

the

gearcase.

Loosen

screw

2 of

feed

crank

just

sufficiently to allow

the

crank

turned

Its

shaft

against

resistance.

facilitate

adjustment.

Insert

screwdriver

the

slot

feed

rock

shaft

crank

Rotate

the

balance

wheel

and

the

same

time

adjust

feed

crank

its

shaft

until

the

feed

dog

(or

rather

the

screwdriver

feed

rock

shaft

crank

3) no

longer

moves.

this

position,

tighten

screw

2 of

feed

crank

Check

this

adjustment

(see

"Correct

setting").

From the library of: Superior Sewing Machine & Supply LLC

2.5

Adjustment

procedure

applied

when

the

gearcase

cover

closed.

2.0.2

2.5.1

Turn

the

stitch

length

control

"0".

2.5.2

Loosen

screw

6 of

the

feed

regulator

crank.

2.5.3 To

facilitate

adjustment,

Insert

screwdriver

the

slot

feed

rock

shaft

crank

3 (Fig. 2.0.1).

2.5.4 With

the

aid

of a

spanner

pushed

over

hexagon

tension

nut

turn

feed

regulator

shaft

until

the

feed

dog

(or

rather

the

screwdriver

the

feed

rock

shaft

crank)

remains

absolutely

still

when

the

balance

wheel

turned.

2.5.5 In

this

position,

hold

the

feed

regulator

shaft

fast

with

the

spanner

and

tighten

screw

2.5.6

Check

this

adjustment

(see

"Correct

setting").

From the library of: Superior Sewing Machine & Supply LLC

Bottom

feed

driving

motion

Correct

With

the

machine

set

for its

longest

stitch

and

the

needle

bar

positioned

setting: 0.6

past top dead center

(pin

in hole 1), the feed dog should not

move

when

the

reverse-feed

control

operated.

3.1

Loosen

both

screws

2 in

feed

driving

eccentric

3.2 Bring

the

needle

bar

to a position 0.6 mm

past

top

dead

center

and

block

the

machine

this

position

inserting

the

pin in

hole

3.3

Set

the

machine

for

its

longest

stitch.

3.4 To facilitate

adjustment,

insert

the

screwdriver

the

slot

of feed rock

shaft

crank

3.5 Move

the

reverse-feed

control

and

down

and

simultaneously

turn

feed

driving

eccentric

1until its

notch

visible

and

the

feed

dog

(or

rather

the

screwdriver

feed

rock

shaft

crank

3) is

compieteiy

motionless.

3.6 In this position, tighten

the

accessible

screw

2 in

feed

driving

eccentric

3.7 Pull

the

out

the

hole in

the

bearing

plate

and

tighten

the

second

screw

2 in

feed

driving

eccentric

3.8

Check

this

adjustment

(see

"Correct

setting").

3.9

Pull

the

screwdriver

out

the

slot

feed

rock

shaft

crank

From the library of: Superior Sewing Machine & Supply LLC

Correct

setting:

Bottom

feed

lifting motion

With the stitch length control

set

at "0" and the needle bar positioned

0.6 mm

past

top

dead

center

(pin hole 1), the feed dog should

at Its

highest point. The notch in feed lifting

eccentric

1should then be positioned

perpendicularly

below

the

center

the

shaft

(Fig. 4.0.2).

4.0.2

4.1

Turn

the

stitch

length

control

to "0"

and

remove

the

bedplate

cover.

4.2

Loosen

both

screws

2 In

feed

lifting

eccentric

1 (Fig. 4.0.1).

4.3 Bring

the

needle

bar

to a

position

0.6 mm

past

top

dead

center

and

block

the

machine

this

position

inserting

the

pin in

hole

4.4 Turn feed lifting

eccentric

1 until the feed dog is at its highest point

and

the

notch in

feed

lifting

eccentric

1 is

positioned

perpendicularly

below

the

center

the

shaft

(Fig. 4.0.2).

4.5 In this position, tighten

the

accessible

screw

2, making

sure

there

is a smali

amount

of play

between

feed

lifting

eccentric

and

the

bearing.

4.6 Pull

the

out

the

hole in

the

bearing

plate

and

tighten

the

second

screw

too.

4.7 Check this

adjustment

(see

"Correct

setting").

From the library of: Superior Sewing Machine & Supply LLC

Feed

dog

height

With the stitch length control

set

at "0" and the needle bar positioned 0.6

mm past lop dead center (pin in hole 1), the feed dog should be centered

in its slots and

contact

the

gauge

throughout its entire length (Fig. 5.0.2).

Bring the needle bar to a position 0.6 mm

past

top

dead

center

and block the

machine

this

position

inserting

the

pin in

hole

Turn

the

stitch

length

control

"0".

Loosen

screw

and

both

screws

5(Fig. 5.0.1).

Place

the

gauge

under

the

presser

foot

that

its

front

edge

flush

with

the

front

edge

the

needle

plate

(Fig.

5.0.2).

Lower

the

presser

bar

lifter

rest

the

presser

foot

the

gauge.

Center

the

feed

dog

its

slots.

Push

the

feed

bar

upwards

until

the

feed

dog

contacts

the

gauge.

Then

tighten

screw

lightly.

Turn

eccentric

bushing

5 a until

the

feed

dog

Is In

contact

with

the

gauge

throughout

Its

entire

length.

Tighten

both

screws

and

screw

making

sure

the

feed

dog

moves

freely

its

slots.

Raise

the

presser

foot lifter,

remove

the

gauge

from

under

the

presser

foot

and

pull

the

out

the

hole

the

bearing

plate.

Check

this

adjustment

(see

"Correct

setting").

From the library of: Superior Sewing Machine & Supply LLC

Centering

the

needle

the

needle

hole

Correct

straight

needle

should

positioned

exactly

the

middle of

the

needle

setting:

hole

(Fig. 6.0.2).

i8i

Bring

the

needle

bar

to its

highest

point

and

remove

the

presser

foot.

Insert

new

needle

(system

134 kk) into

the

needle

bar.

Take

out

screw

6 in

the

eye

the

needle

bar

frame

(Fig.

6.0.1).

Loosen

screw

the

eccentric

stud.

Loosen

screw

8 of

the

needle

bar

frame

hinge

stud.

Turn

the

balance

wheel

while

moving

the

needle

bar

frame

sideways,

and

turn

the

eccentric

stud

until

the

needle

centered

the

needle

hole

(Fig. 6.0.2).

this

position,

tighten

screw

Pull

out

the

eccentric

stud

until

contacts

the

needle

bar

frame

and

tighten

screw

Replace

screw

with

its

washer

the

eccentric

stud

and

tighten

the

screw.

Loosen

screw

again

and

turn

the

balance

wheel

few

turns

ensure

that

the

needle

bar

frame

not

under

stress.

Then

tighten

screw

securely

again.

Check

this

adjustment

(see

"Correct

setting").

From the library of: Superior Sewing Machine & Supply LLC

Correct

setting:

7.0.1

7.1

7.2

7.3

7.4

7.5

7.6

7.7

7.8

7.9

7.10

7.11

7.12

7.13

Eccentric

hook

shaft

bearing

There

should

clearance

of 0.4 mm

between

hook

point

and

the

middle

the

clearance

cut

the

needle

when the sewing hook is up

against

oil

distributor

ring 3 (Fig. 7.0.2). Also

there

should

aminimum

amount

play

between

the

gears.

-Q

rmirn

Remove

the

needle

plate

and

the

feed

dog.

Loose

screw

1 of oil

regulating

valve

and

swivel

the

oil

tube

out

of oil

distributor

ring 3.

Loosen

screw

the

surface

the

bedplate

(Fig. 7.0.2).

Turn

eccentric

hook

shaft

bearing

that

the

recess

visible

from

below

(see

arrow

Fig.

7.0.1)

and

the

two

spur

gears

have

neither

too

much

play

nor

stand

too

together.

Loosen

both

screws

6 of

the

sewing

hook.

Push

the

sewing

hook

against

oil

distributor

ring 3.

Turn

the

sewing

hook

and

reposition

the

needle

bar

until

the

hook

point

positioned

the

middle

the

clearance

cut

the

needle.

Reposition

hook

shaft

bearing

until

there

Is a

clearance

of 0.4

betw

een

hook

point

and

the

middle

the

clearance

cut

the

needle,

making

sure

however

that

the

bearing

not

turned

and

that

the

hook

remains

contact

with

oil

distributor

ring

this

position,

securely

tighten

screw

Loosen

both

screws

Reposition

gear

7 on its

shaft

until it is

exactly

in line with

the

small

gear.

Tighten

both

screws

securely,

making

sure

that

the

second

screw

spur

gear

7 —

seen

in its

direction

rotation

— is

positioned

the

groove

the

shaft

and

both

gears

have

enough

play.

not

tighten

screws

yet

and

leave

the

oil

tube

swivelled

away

for

the

following

adjustment.

From the library of: Superior Sewing Machine & Supply LLC

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