Brother BAS-311G service manual Adjustment

7. ADJUSTMENT

4950Q

5237Q 5238Q

7.Turn the pulley (1) by hand to move the needle bar to its lowest position.

8.Loosen the nut (10), tighten the set screw (11) until the collar (3) is touching the inside of the groove in the thread trimmer cam (4), and then turn it back in the counterclockwise direction by approximately 1/4 of a turn.

9.Tighten the nut (10), and then check that the collar (3) is not touching the inside of the groove in the thread trimmer cam

(4). In addition, push the driving lever (5) by hand toward the thread trimmer cam until the collar (3) touches the groove of the thread trimmer cam (4), and then check that the driving lever (5) returns smoothly to its original position when it is released.

10.Check that there is a gap of about 0 - 1 mm between the outside of the hole in the movable knife (8) and the ridge line on the shuttle race thread guide (12) when there is still play between the parts.

94 BAS-311G, BAS-326G