Brother BAS-311G service manual Adjusting the backlash of the lower shaft gear, Adjustment

7. ADJUSTMENT

7-19. Adjusting the backlash of the lower shaft gear

1. Gently tilt back the machine head.

2. Remove the five screws (1) and three flat screws (2), and then remove the oil cover (3).

3. Remove the four screws (4) and Y-belt cover (5).

5240Q

5157Q 5256Q

4.Loosen the two set screws (6).

5.Place set screw collar R (7) against the edge of the bed so that the pulley can turn easily.

*If the pulley cannot turn easily, loosen the set screw (8) and turn the pulley while moving the rock gear (9) back and forth. At the position where the pulley moves freely, place set screw collar R (7) against the edge of the bed and tighten the set screw (8).

6.Turn the rock gear shaft (10) to adjust the play at the end of the driver (11) to 0.05 – 0.15 mm, and tighten the set screws (6).

BAS-311G, BAS-326G 103