10
Requirement of matching group is in the table below.
Cylinder matching group
Main bearing hole matching group
Group number
and mark
Cylinder
diameter
φ
76
+
0
003
Group number
and mark
Cylinder
diameter
φ
47
0
+0.024
1
≥
0
＜
+0.01
1
≥
0
≤
+0.008
2
≥
+0.01
＜
+0.02
2
＞
+0.008
≤
+0.016
3
≥
+0.02
≤
+0.03
3
＞
+0.016
≤
+0.024
Main points for installing balance chain:
A. Rotate crankshaft to BDC position
B. Mark direction of counter weight on balancing shaft to be the same as that of counterweight
on crankshaft
（
fig.3—6
）
。
Fig.3-6 The position of counter weights and balancing shaft
C. Align the marks (white and bright chain elements) on two balancing shaft sprockets (grooves)
respectively (fig.3—7)
Then install crankshaft sprocket and two balancing shaft sprocket with balance chain on
crankshaft and balancing shaft.
