Operation Manual

to
remove
the upper
and lower
parts
of
the
bobbin
case.
Turn the
balance
wheel
so as
to
see
clearly screws E-1,
E-2, and E-3.
Unscrew
these,
and
take
off the hook bow.
NOTE:
Since
these
screws
are extremely
small,
it
is
necessary
to use great
care
so
as
not to
lose
them.
Grasp
center
hook
between
thumb
and forefinger,
and
turn
the
balance
wheel
gently
until
the
lower
case
slips
out.
Clear
out
the dirt with
a
cloth,
and
put a
drop
of
oil
on the running surface
under
the case.
Replace
lower
bobbin
case.
Do
not force
ii, as
it
will damage
the part.
Replace
the hook
bow,
and screw
the
three
screws
back
into
position.
If
this
is
difficult,
do
not force
it—call
for
your
mechanic.
Parts
damaged
by
force
will
not be
replaced
free
of
charge.
13. To
regulate
pressure
of
the
presser
foot
Screw
or
unscrew
the
bushing
(V),
(Fig.
4),
to
increase
or
decrease
pressure
of
the
presser
foot,
and
to
regulate
it
for
the type
of
material
used.
14.
Adjusting
the
tension
of
the
thread
controller
spring
For embroidering
and
darning,
ease
the
tension
of
the
thread
controller
spring
a
little
more
than
in
the
case
of
sewing.
When
working
on thick
or
hard
materials,
the
tension
should
be
tighter.
To
tighten
the tension,
turn the
lever
of
the
tension
sleeve
as
shown
in
Fig.
4.
a)
indicating
the
position
for
darning
and
embroidering;
b)
indicating
the normal
position;
c)
indicating
the
position
for sewing
thick
and
hard
materials.
The direction
for
turning
the lever
is
indicated
by
“L”
for loose
(light),
and
“F”
for
fast
(tight).
15. The
needle
Make
sure
that
you
use
the
PFAFF
needles
designed
for your
machine—Needle
Series
130
R.
These
are
finely
machined,
tempered
and
polished
steel,
and are
avail
able in
sizes
7
to
11,
for
the
most
delicate
to
the
heaviest
sewing.
16.
To
lower
the
feed
For
darning
and
embroidering,
the
feed
can be
lowered
by turning
the
knob
(X),
(Fig.
6), on
the front
right-hand
side
of
the
bed
plate.
Turn
it
right
to
lower
the
feed;
turn
it
left to
raise
the
feed.
Fig.
13
16