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Chapter 10 Adjustment
BES-962BC • BES-1262BC
235
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 Socket head bolt for top dead center
stopper 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 Socket head bolt for top dead center stopper o while
pressing down the needle bar clamp so that it faces the front. (Tightening torque: 0.78 N
.
m)
Note) • Make sure that the top dead center stopper u does not hit the needle bar guide rail !0 at this time.