Singer 1640 - Page 14

Section
3
THREADING
UPPER THREAD
Raise
presser
foot
and
needle
to
their
highest
position
by
turning
hand
wheel
toward
you.
Place
thread
on
spool
pin
at
back
of
machine.
Pass
thread
through
slots
of
two
top
thread
guides
(A),
then
down
behind
arm
thread
guide
(B>
(Fig.
7)
Place
thread
around
bottom
of
Thread
Tension
Dial
(C)
and
slide
it
up
between
tension
discs
(Fig.
8).
Hold
thread
stationary
with
right
hand
and
pull
thread
with
left
hand
until
check
spring
wire
loop
(D)
goes
up
above top
hook
(E).
Release
thread
so
wire
loop
will
spring
back
into
place
and
thread
will
slip
into
hook.
Lower
presser
foot.
Place
thread
behind
arm
thread
guide
(B),
up
through
hole
in
take-up
lever
(F)
theading
from
right
to
left,
and
back
down
behind
arm
thread guide
(B)
again.
Draw
thread
down
through
thread
guide
(G>
and
needle
bar
thread
guide
(H).
Thread
needle
from
front to
back.
Pull
thread
towards
rear
about
6
inches.
Side
view
of
thread
passing
through
tension discs
for
single
(or
normal>
needle.
INCORRECT
CORRECT
—
Thread
Side
view
of
thread
passing
through
tension
discs
for
twin
needle.
INCORRECT
CORRECT
:—
Threads
F1g8
A
F
C
H
Fig
7
— Thread
H—
Threads