Push Lever Position Adjustment; Slide Shaft Adjustment - Brother b831 Service Manual

2. Push lever position adjustment
Snap ring
Push the shaft O 'n the direction of the arrowto prevent
horizontal play, and tighten screw O to the screw stop.
Be sure the push lever O still operates smoothly.
Excessive horizontal play will affect the stop lever position, and will result in poor operation of both needles
together or either independently It will be hard to drive both or either needlefs) if the drive torque is too great.
3. Slide shaft adjustment
Slide shaft support bracket
Set stop lever O to R on position guide O- Loosen screw 0 and move lever shaft arm 0 right or left so that the end of
slide shaft O is even with the end of slide shaft support 0.
Lever shaft arm 0 will not function properly, and levershaft arm spring and set collar adjustment will be difficult, ifthe
slide shaft O is not properly aligned with the end of slide shaft support 0.