Operation Manual

Accumulations
of lint
packed
betweenfeedteeth.
Take
off
needle
plate
and
remove
lint
with
a stiff
brush.
6.
Machine
Works
Heavily
Cause:
Motor
belt
is
loose
and
slips,
or
has shrunk
and causes
excessive
pressure
an
bearings.
Hook
raceway
lacks oil
or is
obstructed
by
pieces
of thread.
Mechanism
clogged
by
inferior
oil.
Bobbin
winder
working
while
sewing.
(When
a
bobbin
is
not
being
filled).
Snarled
thread
between
balance
wheel
and
bushing.
Remedy:
Loosen
or tighten
motor
belt
by
adjusting
idler.
Clean
and
oil
hook
raceway.
Use
only Piaff
sewing
machine
oil — never
salad
oil
or
glycerine.
Stop
bobbin
winder.
Unwind
and
remove
thread.
Thread
Jamming
If thread
jams
in the
sewing
hook
mechanism
and
blocks
it, proceed
as
follows:
The
thread
will
come
out
more
easily
if you
put
a few
drops
of
oil
or
cleaning
fluid
into the
hook
raceway.
Tighten
the stop
motion
knob.
Move
the
balance
wheel
away
from
you.
Take
the end
of the
thread
and
pull
it out
while
rocking
the balance
wheel.
If
thread
is still
jammed,
call
your
Pfaff
dealer
for
help.
Thread
iamming
can
be avoided
by
following
the
instructions
on
pages
4 and
5.
32