Brother 431B Sewing Machine User Manual


 
4. ASSEMBLY
KE-430B, 430C series
84
3400Q
3399Q
While turning the machine pulley, move the
rock gear to the left and right to find the
position where it moves smoothly. Then
without moving the rock gear, turn the rock
gear shaft so that there is a gap of 0.05--0.12
mm at the end of the driver, and tighten the
set screws.
* Check that the machine pulley turns
smoothly.
Place the upper shaft timing
belt onto the upper shaft
pulley and the motor pulley.
3401Q
Carry out the steps in “5-26.
Adjusting the tension of the upper
shaft timing belt” before tightening.
14. Set screws [2 pcs]
15. Wick [Pass through the rock gear shaft and make a knot]
16. Upper shaft timing belt
17. Motor bracket
18. Bolts [3 pcs: Temporarily tighten]
19. Bolt
20. Nut
21. Motor connector