Operation Manual

N
_
I
Thread
Breaking
Tightness
of
Machine
Cause:
Remedy:
Cause:
Remedy:
Thread
breaking
may
occur
for
any
of
See page
41.
Drive
belt
too
iong
and
slips
off,
or too
Shorten
belt
or
insert
a
piece
for
length
the
aforementioned
reasons,
short
causing
excessive
pressure
on the
ening.
Cut
the
belt straight.
bearings.
Thread
tension
too
tight.
Adjust
upper
and
lower
tensions
in
accordance
with
Sections
13
and
14.
Shuttle
race
dry
or
obstructed
by odd
Clean
and
oil
shuttle
race.
thread.
Use
of
inferior
or
knotty
thread.
Only
use
topquality
sewing
machine
Mechanism
clogged
up
by inferior
oil.
Use only
PFAFF
sewing
machine
oi
thread
or
a
good
quality
of
silk.
never
salad
oil
or glycerine.
Race
being
dry
or
odd
threads
jamming
Cleanondoiltheracein
accordancewith
Feeder
jams
in
the
needle
plate.
Unscrewbothfeeddogand
needle
plah
the
race.
Sections
21
and
22.
and
readjust
properly.
Thread
having
slipped
off
the
reel.
Do
not
place
the
reel
on
the
vertical
reel
Winder
engaged
while
sewing.
Disengage
winder.
pin
but
use
the
horizontal
reel
holder
Thread
looped
up between
balance
Remove
and
unwind
thread
with
the
aic
(furnished
at
an
extra
charge).
wheel
and
bushing.
of
a
thin
needle.
42
43
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