Weichai America Corp.
8
Tightening
torque
22Nm~29Nm
Grade
8.8
Tightening
torque
29Nm~35Nm
Grade
10.9
Key point 2:
Assembly
Tighten the main bearing bolts in a symmetric way according to the sequence shown in the figure
below. Before assembly, apply clean lubricating oil to the bearing surface of crankcase and the
threads of main bearing bolts. The main bearing bolts can be used repeatedly 6 times, the length
of the bolt extension is less than 172 mm.
Ⅰ
Ⅱ
Ⅲ
Ⅳ
Ⅴ
Ⅵ
Ⅶ
1
2
3
4
5
6
7
8
9
10
11
12
13
14
Fig. 2-2 Tighten order of main bearing bolts
Tightening
torque
265Nm±25Nm
Key point 3:
Assembly
Tighten the cylinder head auxiliary bolts according to the sequence shown in the figure below,
and these bolts can be reused at most 2 times.
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