Pfaff 245, 1245, 246, 1246 Service Manual

PFAFF

246

®

Service

Innovation

Nr.

296-12-1^

552

Manual

mode

by

PFAFF

engl.

9/89

Notes

The

machine

If

it

observed.

Service-

Apart

is

not

CONTENTS

on

safety

is

converted

.

and

from

exceptions

permitted.

must

repair

only

to

be

used

another

work

must

according

for

the

version,

only

be

to

DIN

purpose

all

valid

carried

57 105 and

it

out

was

designed

safety

by

qualified

VDE

0105, work on

for.

regulations

personnel.

Page

must

live

be

parts

11

12

10

1

2

3

4

5

6

7

8

Positioning the feed dog

Preliminaryadjustment of feed lifting

Centering the needle in the needle hole

Topand bottom feed advancing motions

Hook

timing,

hook-to-needle clearance and

Needle guard

Final adjustment of feed lifting

Clearance

between

presser

foot

motion

and

needle

motion

needle

plate

bar

height

4

7

8

9

10

12

13

14

(-706/35; -706/47and -706/48)

9

Top-to-bottom-feed timing

Top feed lifting motion

Bobbin

Tension

case opener

release

mechanism

15

16

17

18

13

14

15

Threadcheck

Bobbin

winder

Final worksteps

spring

19

20

21

Instructions for adjusting Pfaff

245,

1245

and

1246 machines

Note:

Technical

Needle

Needle

Top

feed lift: 5

data

system:

bar

rise:

All illustrations in this book apply to Pfoff 245 and 1245 single-needle
machines. On Pfaff 246 and 1246 two-needle machines various adjustments

have to be mode

effect;

some

twice.

The respective sections contain a note to this

of the illustrations in these sections apply in reflex.

134-35 on subcl. -706/05, -706/07 and -706/35

134 on subcl. -706/25

190

ModelsAand

Models B/C and C =

Models C/D and D =

7

5

5.5

8.0

• on subcl.-706/47 and-706/48

B

=1.6

mm

2.0

mm

2.2-2.5

mm

on subcl. -706/05

mmonsubcl.

mm

on subcl. -706/25

mm

on subcl. -706/35

mm

on subcl. -706/48

-706/07

and

mm

-706/47

Max.

clearance

between

presser

foot

and

needle

plate:14mm*

Tools, gauges and other items needed for adjustment

Setofscrewdrivers

Set of alien keys ranging

Set of spanners from 7 to 14

C-clomp, No. 08-880 137-00

Gauge,

Metal

Sewing

No.

rule

thread and material for testing

En

machines equipped with knee lifter or subcl. -910/04.

08-880

with

136-14

blades

from

mm

from 2to10 mm

2 to 6

mm

wide

purposes

wide

1

Positioning the feed dog

Correct

setting:

1.1

Adjustment:

The

feed

dog

must

not

strike

the

needle

motion.

Position crosswise to sewing direction

Center the feed

dog

in its

slots

sideways.

plate

during

any

phaseofits

1.1.1

1.1.2

1.1.3

Please

1.1.4

note:

Take

the

needle

(two each). ~ ~

Adjust

In this

The

Rock

Leave

shaft3sidewayssothat the

|X}sition,

surfacesofthe

shaft3must

screws^loose

outof the

tighten the

centre

not

have

for

the

needle

holder

feed

two

screws

pins

shouldbeopposite

any

play

and

subsequent

and

loosen

screws

dogiscentered

1.

the

not

bind

either.

adjustments.

1and 2

in itsslot.

surfacesofscrews

1

""

1.2

Position in sewing direction

Correct

setting:

With

the

machine

set at its

longest

stitch, the feed

strike the near and far ends of its slots

sewing.

0

during

forward

dog

must

and reverse

not

1.2.1

1.2.2

1.2.3

1.2.4

Set the machine at the longest stitch.

Making

shaft3 so that the feed

forward

In this position, tighten both screws 2.

sure

that

screws

2 in

dog

and reverse sewing.

driving

does

notstrike the

crank

Check this adjustment (see "Correct setting").

4 ore still

ends

of its slot

loose,

adjust

during

1.3

Feed dog height

Correct

setting:

With the stitch length setat"0",

above the needle plate when it isatits highest point.

the feed dog should show a full tooth

1.3.1

1.3.2

1.3.3

1.3.4

1.3.5

1.3.6

1.0.5

Set

the feed regulator leverat"0".

Turn

the

balance

Loosen

Adjust

the needle plate.

In this position, tighten both

Check

screws

feed bar 6 vertically until the feed

this

wheeltobring

5.

adjustment

(see

the

screws

"Correct

feed

dogtoits

dog

5.

setting").

highest

shows

a full tooth above

point.

Preliminary adjustment of feed lifting motion

Correct

preliminary

setting:

Note:

When

the

needle

barisdt

bottom

dead

center

the

feed

dog

should beatits highest point.

This adjustment is omitted on machines without four-motion drop

feed.

2.1

2.2

2.3

2.4

©

Unscrew

Loosen

bartobottom

Turn lifting

and

screws

remove

the

coveronthe

bockofthe

arm

and turn the balance wheel to bring the needle

dead

center.

eccentric

2 so that its lobe is up.

standard.

In this position, securely tighten the accessible screw 1. Leave

the

second

screw^loose

until

after the

final

adjustment.