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5.
Machine
Feeds
Improperly
Cause:
Remedy:
Feed
dog
set
too
low,
does
not
rise
up
enough
obove
Hove
your
Pfoff
dealer
make
the
necessary
adjustment.
needle
plate
level.
Accumulations
of
lint
pocked
between
feed
teeth.
Take
off
needle
plate
and
remove
lint
with
a
stiff
brush.
6.
Machine
Works
Heavily
Cause:
Remedy:
Motor
belt
has
shrunk
and
causes
excessive
pressure
Loosen
motor
belt
by
adjusting
idler
(see
page
28).
on
bearings.
Hook
raceway
lacks
oil
or
is
obstructed
by
pieces
of
Clean
and
oil
hook
raceway.
thread.
Mechanism
clogged
by
inferior
oil.
Use
only
Pfaff
sewing
machine
oil
—
never
salad
oil
or
glycerine.
Bobbin
winder
working
while
sewing
(when
a
Stop
bobbin
winder.
bobbin
is
not
being
filled.>
Thread
Jamming
The
new
PFAFF
rotary
hook
will
not
normally
Earn,
even
if
the
machine
should
be
handled
improperly.
If
thread
should
happen
to
jam
in
the
raceway
of
the
sewing
hook,
the
power
of
the
motor
will
be
sufficient
to
over
come
hard
working
of
the
mechanisiii.
Thread
jamming
can
be
avoided,
however,
by
following
the
instructions
on
page
5.
31