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Husqvarna Viking 20 Manual

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terlal
to
make
sure
that
the
machine
sews
without
soiling.
To
clean
machine,
open
face
door
and
needle
plate.
Using
the
small
Causes
of
the
most
common
sew
ing
machine
troubles
and
their
remedies
Hard
running
of
machine:
1.
Motor
belt
too
tight
or
has
jumped
off
motor
pulley
or
hand
wheel.
2.
Machine
lubricated
with
unsui
table,
gummy
oil.
Pour
a
few
drops
of
kerosene
into
each
oil
hole
and
run
machine
for
a
few
minutes.
Then
lubricate
with
proper
sewing
machine
oil.
Machine
not
feeding
properly:
1.
Make
sure
stitch
regulator
knob
(21)
is
not
set
on
“0”.
(Refer
to
page
16
on
“Regulating
the
Length
of
Stitches”.)
2.
Feed
dog
in
dropped
position.
Raise
feed
dog
pursuant
to
in
structions
contained
in
chapter
on
“Lowering
Feed
Dog”,
page
17.
3.
Pressure
of
presser
foot
not
sufficient.
Increase
pressure
by
turning
regulator
wheel
(37)
brush
included
with
the
set
of
attach
ments,
remove
all
accumulations
of
loose
threads,
lint
and
fuzz
from the
exposed
parts
of
the
mechanism
in
the
arm
and
from
the
teeth
of
the
feed
dog.
clockwise
after
opening the
face
door.
Also
see
“Regulating
the
Pressure
of
the
Presser
Foot”
on
page
14.
Irregular
winding
of
bobbin:
1.
Machine
not
threaded
correctly
for
winding.
2.
Thread
jumped
out
of
tension
device,
fig.
13,
page
15.
3.
Tension
device
not
in
correct
position.
Adjust
following
in
struction
on
page
17.
Needle
thread
breaks:
1.
Needle
inserted
incorrectly
(re
fer
to
page
ii).
2.
Needle
not
thread
properly
(page
13).
3.
Tension
of
needle
thread
too
tight.
4.
Knots
in
thread.
5.
Needle
too
fine
for
thread
used.
Check
chart
on
page
10.
6.
Needle
bent
of
needle
point
broken.
Change
needle.
7.
Stitch
hole
in
needle
plate
rough
or
sharp.
Repair
or
replace.
8.
Point
of
rotary
sewing
hook
damaged.
Have
it
repaired
and
repolished.
Bobbin
thread
breaks:
1.
Bobbin
case
not
inserted
cor
rectly
(page
13).
2.
Bobbin
thread
too
tight
(see
page
17).
3.
Bobbin
wound
unevenly.
4.
Bobbin
wound
too
fully.
5.
Poor
thread.
6.
Stitch
hole
in
needle
plate
rough
or
sharp.
Repair
or
re
place
needle
plate.
Bobbin
thread
cannot
be
pulled
up:
1.
Needle
is
inserted
incorrectly
(page
11).
Needle
breaks:
1.
Needle
bent.
Insert
new
needle.
2.
Pulling
material
from
behind
needle
while
sewing.
(Do
not
help
machine
feed
material.)
Skipping
stitches:
1.
Needle
bent
or
blunt.
Insert
new
needle.
2.
Needle
inserted
incorrectly.
Re
fer
to
page
ii.
3.
Needle
threaded
improperly.
See
page
13.
4.
Wrong
size
of
needle
used.
5.
Thread
too
heavy
for
needle.
6.
Pressure
of
presser
foot
insuf
ficient,
especially
when
sewing
on
heavy
material.
See
page
14.
Loose
stitches
—
loops
on
underside
of
material:
I.
Machine
not
threaded
correctly.
2.
Presser
foot
not
let
down
com
pletely.
3.
Insufficient
tension
of
needle
thread.
See
page
16.
4.
Thread
take-up
spring
(12),
fig.
1,
bent
or
broken.
Repair
or
replace.
Poor
stitches
—
bad
looking
seam:
1.
Thread
wound
unevenly
on
bob
bin.
See
page
11.
2.
Upper
thread
tension
too
tight
or
too
loose.
See
page
16.
3.
Bobbin
thread
too
coarse.
Should
be
same
as
needle
thread
or
even
somewhat
finer.
Refer
to
Needle
and
Thread
Selector”,
page
10.
4.
Needle
thread
too
coarse
for
material.
3.
Needle
not
suited
for
material.
6.
Needle
point
damaged.
Uneven
thread
tension:
1.
Poor
quality
of
thread.
Wrinkling
of
material:
1.
Needle
thread
tension
too
tight.
2.
Needle
and
bobbin
thread
ten
sions
too
tight
for
material
used.
3.
Presser
foot
pressure
too
great.
Turn
regulator
bushing
(°2)
to
left
(fig.
18).
Stitches
of
varying
lengths:
1.
Feed
dog
is
clogged
with
lint.
Clean
it
out.
2.
Worn
teeth
in
feed
dog.
Replace
feed
dog.
Loosely
stitched
seams:
1.
Upper
(needle
)and
lower
(bob
bin)
thread
tensions
too
loose.
See
page
16.
Cloth
is
chewed
up:
1.
Pressure
on
presser
foot
too
tight.
See
page
14.
Important
note
1)o
not
try
to
repair
the
machine
yourself
if
it
fails
to
operate
satis
factorily
after
having
followed
the
abovementioned
suggestions.
Only
your
class
20
dealer,
by
virtue
of
his
skill
and
experience,
is
qualified
to
service
your
machine
competently
and
is
able
to
maintain
its
outstanding
performance.
Fig.
79.
88
39
… 21


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