Operation Manual

2.
Certain
working
ports
of
the
machine
are
dry
— apply
Cause
of
faults
and
simple
home
service
4.
___________________________________________________
a
few
drops
of
oil.
3.
A
component
part
has
worked
itself
loose
—
retighten
it
with
a
screwdriver
Please
always
remember:
many
machine
troubles
may
be
caused
by
your
not
carefully
following
these
working
instructions.
In
many
cases,
faulty
working
of
your
mach-
The
upper
thread
breaks
me
can
be
remedied
merely
by
cleaning
and
oiling.
1.
Inferior
quality,
knotty
sewing
thread
breaks
easily
—
use
a
better
quality.
Machine
works
heavily
2.
The
needle
selected
is
too
fine
for
the
thread
or
ma
terial
used
—
use
a
thicker
needle
(see
page 5:
“Relat
1.
Thread
ends
have
become
entangled
in
the
hook
race
—
ive
Needle
and
Thread
Sizes”).
remove
all
obstructions.
2.
Certain
working
parts
of
the
machine
are
dry
—
apply
The
upper
thread
tension
is
too
severe
—
loosen
the
a
few
drops
of
oil,
setting
flange
on
tensioner
(see
page
12:
“Regulating
the
ThrecidTensions”)
3.
The
machine
is
dirty
— thoroughly
clean
it.
4.
The
needle
is
wrong
inserted,
or
it
is
bent
—
change
4.
The
wrong
kind
of
oil
has
been
used
—
clean
the
mach
ine
with
paraffin.
the
needle
(see
page
6:
Inserting
the
Needle)
5.
The
eye
of
the
needle
has
a
knife
edge
—
change
the
needle.
The
machine
is
noisy
1.
Thread
ends
have
become
entangled
in
the
hook
race
—
6.
Thread
ends
or
dirt
are
interfering
with
the
free
move
remove
all
obstructions.
ment
of
the
feed
dog,
resulting
in
bad
feeding
of
the
18
19
i.
.