Pfaff 73 Owner's Manual - Page 28

glycerine.

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6. Machine Works Heavily Cause: 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). Remedy: Clean and oil hook raceway. Use only Pfaff sewing machine oil - never salad oil or glycerine. Stop bobbin winder. 7. Motor Idles Cause: Remedy: S Motor disengaging lever raised. Flick lever down (see page 5). Thread Jamming The Pfaff rotary hook will not normally to jam in the hook raceway, the power jam, even if the machine should be of the motor in most instances will handled improperly. If thread be sufficient to overcome hard should happen working of the mechanism. If this action should not free the jammed thread, put a drop of oil into the hook raceway, jerk the balance wheel back, then rock it back and forth. 27

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6.
Machine
Works
Heavily
Cause:
Remedy:
Hook
raceway
lacks
oil
or
is
obstructed
by
Clean
and
oil
hook
raceway.
pieces
of
thread.
Mechanism
clogged
by
inferior
oil.
Use
only
Pfaff
sewing
machine
oil
—
never
salad
oil
or
glycerine.
Bobbin
winder
working
while
sewing
Stop
bobbin
winder.
(when
a
bobbin
is
not
being
filled).
7.
Motor
Idles
Cause:
Remedy:
Motor
disengaging
lever
raised.
Flick
lever
down
(see
page
5).
S
Thread
Jamming
The
Pfaff
rotary
hook
will
not
normally
jam,
even
if
the
machine
should
be
handled
improperly.
If
thread
should
happen
to
jam
in
the
hook
raceway,
the
power
of
the
motor
in
most
instances
will
be
sufficient
to
overcome
hard
working
of
the
mechanism.
If
this
action
should
not
free
the
jammed
thread,
put
a
drop
of
oil
into
the
hook
raceway,
jerk
the
balance
wheel
back,
then
rock
it
back
and
forth.
27