Brother BAS-311E service manual Lower shaft mechanism, Assembly, w q e t o u 0y

Chapter 3. Assembly

9. Lower shaft mechanism (1)

!3 i

wq

e

t o u

!0y

!1

r

!2

!5

Matching mark 0.05 - 0.12mm

!3w

!6

!4

q

!7

!3

u!1

1.Tilt the machine head until it stops.

2.Insert the rock gear shaft q from the rear of the machine, pass the rock gear w, the set screw collar e over the shaft, bring them close together without any clearance, and tighten the set screw r.

3.Insert the lower shaft t from the rear of the machine, pass the set screw collar y over it, and engage the lower shaft gear u with the rock gear w.

4.Sandwich the lower shaft bush i between the lower shaft gear u and the set screw collar y without any clearance, and tighten the set screw o.

5.Fit the retaining ring !0on the lower shaft t, press the driver !1against the retaining ring !0, and tighten the bolt !2.

6.Return the machine head to its original position.

7.Fit the crank rod !3over the crank of the upper shaft !4, align the matching mark of the crank rod !3with that of the upper shaft !4, and tighten the screw !5.

8.Tilt the machine head until it stops.

9.Turn the pulley !6to move the rock gear w right and left until the pulley rotates easily. Turn the rock gear shaft q to

allow 0.05 - 0.12 mm play of the driver !1. Then tighten the set screw !7. 10.Return the machine head to its original position.

BAS-311E.311EL.326E.326EL 43