Brother International LK3-B430 Service Manual - Page 19

Threading, Needle

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THREADING I. Tension release bar plate 0 Connect it to the tip of the tension release bar. and temporarily fasten it with two each screws 0 and washers 0. 2. Guide stud 0 Install it on the thread take-up guide bearing, using a screwdriver. 3. Thread take-up lever 0 Install it with two screws and 0. 4. Sub-tension 0 Temporarily fasten it to the arm with screw 0. 5. Main tension (j) Install it on the arm with screw S. 1 NEEDLE BAR I. Thread take-up lever Install it with stud O. and tighten it with screw 0. 2. Needle bar crank 0 Insert it into the lower end of thread take-up lever 0, and tighten one of the two screws, whichever is ahead in the rotating direction, until it hits the screw stop. 3. Put oil cap 0 on. 0 4. Needle bar connecting rod Fasten it to the needle bar crank with screw 0 (left-handed). 5. Needle bar 0 0 Fit slide block m onto needle bar clamp 0, insert it into the needle bar connecting rod and needle 0. bar guide. insert needle bar 0 into the arm from above, and temporarily tighten it with screw 0 000 %a> 0 • • 1s 4ro 00 0 0 • • -17-

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THREADING
I.
Tension
release
bar
plate
0
Connect
it
to
the
tip
of
the
tension
release
bar.
and
temporarily
fasten
it
with
two
each
screws
0
and
washers
0.
2.
Guide
stud
0
Install
it
on
the
thread
take-up
guide
bearing,
using
a
screwdriver.
3.
Thread
take-up
lever
0
Install
it
with
two
screws
and
0.
4.
Sub
-tension
0
Temporarily
fasten
it
to
the
arm
with
screw
0.
5.
Main
tension
(j)
Install
it
on
the
arm
with
screw
S.
1
NEEDLE
BAR
I.
Thread
take-up
lever
Install
it
with
stud
O.
and
tighten
it
with
screw
0.
2.
Needle
bar
crank
0
Insert
it
into
the
lower
end
of
thread
take-up
lever
0,
and
tighten
one
of
the
two
screws,
whichever
is
ahead
in
the
rotating
direction,
until
it
hits
the
screw
stop.
3.
Put
oil
cap
0
on.
4.
Needle
bar
connecting
rod
0
Fasten
it
to
the
needle
bar
crank
with
screw
0
(left-handed).
5.
Needle
bar
0
Fit
slide
block
m
onto
needle
bar
clamp
0,
insert
it
into
the
needle
bar
connecting
rod
0
and
needle
bar
guide.
insert
needle
bar
0
into
the
arm
from
above,
and
temporarily
tighten
it
with
screw
0.
000
0
%a>
14
s
r
o
0
0
0
0
• •
•
•
—17—