Brother HE-800B, Service Manual

Page: 98 / 178

7. ADJUSTMENT
HE-800B
89
7-4. Adjusting the needle and hook timing
1. Press the THREAD key to switch to threading mode.
2. Press the key.
3. Gently tilt back the machine head.
4. Loosen the knob screw (1), and then fully open the
slide cover (2).
5. Loosen the two screws (4) of the rotary hook joint (3).
6. Turn the pulley (5) in the regular direction of rotation
(A: toward the front) so that the needle bar (6) just
begins to rise from its lowest position.
7. Insert the “2” part of the gauge (7) between the needle
plate (8) and the lower edge of the needle bar (6), and
then align the rotary hook tip (9) with the center of the
needle when the needle bar (6) contacts the gauge
(7).
* Different gauges (optional part) are used for each of
the two specifications -2 and -3, so make sure that the
gauge being used matches the specifications and
application for the sewing machine being adjusted.
8. Tighten the two set screws (4) of the rotary hook joint
(3).
9. Close the slide cover (2), and then tighten the screw
(1) to secure it.
CAUTION
Close the slide cover (2) and secure it. The
inner pulley (5) rotates during sewing, so do
not touch it, otherwise injury may occur.
10. Gently return the machine head to its original position.
11. Press the THREAD key.
4880M
4883M 4882M
Mark
4881M
4879M