Pfaff 259 Owner's Manual - Page 30

improperly.

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6. Machine Works Heavily Cause: Motor belt has shrunk and causes excessive pres sure on 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). Remedy: Have your Piaff dealer adjust the belt tension. Clean and oil hook raceway. Use only Pfaff sewing machine oil-never salad oil or glycerine. Stop bobbin winder. Thread Jamming The new PFAFF rotary hook will not normally jam, 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 overcome hard working of the mechanism. Thread 1 amming can be avoided, however, by following the instructions on page 4. 29

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6.
Machine
Works
Heavily
Cause:
Remedy:
Motor
belt
has
shrunk
and
causes
excessive
pres
Have
your
Piaff
dealer
adjust
the
belt
tension.
sure
on
bearings.
Hook
raceway
lacks
oil
or
is
obstructed
by
pieces
Clean
and
oil
hook
raceway.
of
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
jam,
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
overcome
hard
working
of
the
mechanism.
Thread
1
amming
can
be
avoided,
however,
by
following
the
instructions
on
page
4.
29