Husqvarna Viking Automatic 21 User manual

SERVICE

MANUAL

for

VIKING

home

sewing

machine

class

Table Of Contents

Page

1 Adjust the machine for straight stitching

1 Timing the needle swing

2 Setting the presser bar height

3 Centering the needle in the throat plate hole

3 Setting center position for zig-zagging

3 Tangential adjustment of sewing hook

4 Setting needle bar height

4 Setting clearance between sewing hook and needle

5 Setting the feed dog height

6 Timing the feed

6 Lateral setting of the feed dog

6 Setting the thread giver

7 Setting the take up spring tension

8 Changing camshaft drive belt

Adjusting

the

machine

for

straight

stitching

staff

(

Fig

)

and

turn

the

Set

the

needle

swing

control

starting

position

control

the

right

Adjust

lever

(

Fig

)

obtain

minimum

play

between

the

high

point

cam

and

the

follower

(

Fig

)

This

setting

should

made

with

the

stitch

selector

Loosen

screw

(

Fig

)

with

screwdriver

(

Fig

)

and

tighten

after

making

the

setting

Fig

Timing

the

needle

swing

Set

the

needle

swing

control

for

maximum

stitch

width

Turn

the

worm

gear

(

Fig

)

the

camshaft

pertaining

the

zig

zag

drive

until

the

left

hand

and

right

hand

movements

the

needle

bar

frame

(

Fig

)

terminate

when

the

tip

the

needle

than

(

)

above

the

throat

plate

the

downward

stroke

Loosen

screws

(

Fig

)

and

tighten

them

again

after

making

the

setting

Centring

needle

throat

plate

hole

Set

the

needle

swing

control

for

maximum

stitch

width

Turn

eccentric

(

Fig

)

the

needle

bar

frame

(

Fig

)

which

serves

bearing

for

link

(

Fig

)

from

the

zig

zag

drive

until

the

needle

swings

the

throat

plate

hole

with

equal

clearance

both

sides

when

the

hand

wheel

turned

Loosen

set

screw

(

Fig

)

before

making

the

settling

and

tighten

afterwards

Setting

centre

position

for

zig

zagging

Set

the

starting

position

control

the

centre

position

and

the

needle

swing

control

Loosen

screw

(

Fig

)

and

make

the

setting

pressing

easing

follower

(

Fig

)

until

the

needle

centred

the

throat

plate

hole

Tangential

adjustment

sewing

hook

Set

the

machine

for

straight

stitching

the

right

hand

starting

position

and

for

zig

zag

stitch

(

)

wide

Use

the

handwheel

bring

the

needle

about

(

)

above

the

lower

end

the

stroke

the

way

Loosen

the

bevel

gear

(

Fig

)

the

lower

camshaft

and

screw

fast

again

such

position

that

the

tip

(

Fig

)

the

sewing

hook

comes

line

with

the

centreline

the

needle

(

Fig

)

The

arm

sleeve

must

removed

for

this

setting

Timing

the

feed

This

setting

easiest

make

with

the

machine

set

tor

maximum

stitch

length

The

feeding

the

cloth

should

stop

just

before

the

needle

goes

down

into

when

sewing

both

forwards

and

backwards

adjust

turn

eccentric

(

11574

Fig

)

the

camshaft

Loosen

screw

(

Fig

)

make

this

setting

and

then

tighten

again

Lateral

setting

the

feed

dog

Turn

lever

(

Fig

)

its

shaft

(

Fig

)

Loosen

screw

(

Fig

)

for

this

setting

and

tighten

again

afterwards

Setting

the

thread

giver

This

setting

made

turning

the

thread

tensioner

Open

the

face

plate

first

get

the

screw

(

Fig

)

which

holds

the

tensioner

Loosen

the

screw

and

turn

the

tensioner

with

screwdriver

shown

Fig

Changing

camshaft

drive

belt

Take

off

the

belt

guard

the

end

the

machine

Take

out

the

duction

gear

raising

enough

get

free

the

belt

(

Fig

)

move

the

screw

the

centre

the

handwheel

(

Fig

)

which

holds

the

camshaft

Draw

out

the

handwheel

from

the

machine

sliding

the

loose

belt

(

Fig

under

the

wheel

towards

the

centre

the

machine

both

sides

that

the

handwheel

and

belt

can

come

out

through

hole

(

Fig

)

the

sew

ing

head

replace

the

handwheel

and

belt

proceed

the

opposite

manner

Place

the

new

belt

the

belt

groove

the

handwheel

;

slide

the

free

end

the

belt

into

place

holding

the

free

section

belt

the

underside

the

wheel

wards

the

centre

the

machine

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