Pfaff hobby 4240 - Inserting the Bobbin; Checking the Bobbin Thread Tension; Adjusting the Setting; Inserting the Bobbin Case

nserting
the
bobbin
Insert
the
bobbin
into
the
bobbin
case
In
doing
so,
pull
the
thread
through
the
slit
A,
then
under
the
tension
plate
B
until
it
lies
in
the
opening
(see
arrow).
Checking
the
bobbin
thread
tension
Hold
the
thread
protruding
from
the
bobbin
case
and
pull
the
thread
upwards
sharply.
The
bobbin
case
must
drop
down
the
thread
during
this
movement.
Adjusting
the
setting:
Using
the
screwdriver
from
the
accessories,
turn
setting
screw
C
to
the
left
— the
bobbin
thread
tension
becomes
weaker
Turn
setting
screw
C
just
a
little
to
the
right —
the
bobbin
thread
tension
becomes
stronger.
Inserting
the
bobbin
case
Open
cover
D
and
slide
the
bobbin
case
onto
the
hook
pin
E
as
far
as
it
will
go.
The
bobbin
case
finger
F
must
point
into
cutout
G.
Check:
Pull
the
bobbin
thread
sharply.
The
bobbin
case
must
not
fall
out
of
the
hook.
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