Operation Manual

Cause
Poor
or
knotty
threod
used.
Shuttle
race
without
oil
or
threod jomming
in
the
race.
Thread
slipped
off
the
spool.
Hard
trj
Cause
Driving
belt
either
too
loose
and
slips,
or
too
tight
causing
excessive
pressure
on
the
bearings.
Shuffle
race
without
oil
or
obstructed
by
thread.
Mechanism
clogged
up
by
infenor
oiL
Peed
dog
jams
in the
feed
slot.
Bobbin
winder engaged
wnen
sewing.
Thread
snarled
up
be
tween
balance
wheel
and
bushing.
32
Remedy
Use only
first-rate
thread
or
a
good
quality of
silk.
Clean and
oil
the shuttle
race
as
instructed
in
Chap
ter
12.
Place
the
spool
of
thread
on
the
transverse
rather
than
the
vertical
spool
pin.
Remedy
Either.
shorten or
lengthen
belt
by
inserting
a
piece
of
belting.
Cut
the
belt
on
the
straight.
Dean and
oil
shuffle race.
Use
only
Pfaff
sewing ma
chine
oil,
never
salad
oil
or
glycerine.
Unscrew
both
the
feed do
and
the
needle
plate
an
readjust
properly.
Disengage
bobbin winder.
Remave
thread
with
a
thin
needle. (If
necessary,
take
off
balance
wheel).