Brother BES-1241BC, Instruction Manual

Page: 153 / 182

Chapter 8 Standard Adjustment
BES-941BC • BES-1241BC
151
1. Turn the pulley B
q
until the scale of pulley B
q
indicates 180˚ (where the pulley B indication
mark " " and the stop mark " " are aligned) and the needle bar is set at the lowest position.
2. Insert the positioning bar
w
into the hole of the pulley B
q
and fix the drive shaft.
Note) Turn the pulley B securely in the clockwise direction.
3. Insert the bottom dead center gauge
e
into the rotary hook
r
.
4. Loosen the screw
y
of the needle bar clamp
t
and the top dead center stopper bolt
o
, then
move the needle bar up and down until the needle tip touches the gauge
e
lightly.
Note) • The needle point should touch the gauge at a place other than the cutting section.
• The bottom dead center gauge should be set in or removed from the rotary hook with its cutting section
facing upward.
5. Tighten the screw
y
of the needle bar clamp
t
securely.
6. After adjustment is finished, remove the positioning bar
w
.
7. Set the needle bar at the highest position (where the pulley B indication mark " " and the
cover indication mark " " are aligned). Lightly press the top dead center stopper
u
toward
the cushion rubber
i
, and tighten the top dead center stopper bolt
o
while pressing down
the needle bar clamp so that it faces the front.
Note) • Make sure that the top dead center stopper
u
does not hit the needle bar guide rail
!0
at this time.
• When tightening the upper dead point stopper bolt
o
, insert the longer side of the attached wrench into
the bolt and tighten it by using the shorter side.
Excessive tightening may make the needle bar movement sluggish.