Komatsu PC88MR-10 Shop Manual page 55

Tightening torque table for 102, 107, and 114 series engines (joint bolts)
a Unless otherwise specified, tighten the metric joint bolts used on the 102, 107, and 114 series engines to
the torque shown in the table below.
Thread diameter (mm)
6
8
10
12
14
Tightening torque table for tapered screws on 102,107, and 114 series engines (National taper pipe
thread (NPT))
a Unless otherwise specified, tighten the National taper pipe threaded (NPT) screws used on the 102, 107,
and 114 series engines to the torques shown in the table below.
Material of female screw
Nominal thread size
1 /
16
1 /
8
1 /
4
/
3
8
1 /
2
3 /
4
PC88MR-10
Tightening torque (Nm {kgm})
10 ± 2 {1.02 ± 0.20}
12 ± 2 {1.22 ± 0.20}
24 ± 4 {2.45 ± 0.41}
36 ± 5 {3.67 ± 0.51}
In cast iron or steel
Tightening torque (Nm {kgm})
15 ± 2 {1.53 ± 0.20}
20 ± 2 {2.04 ± 0.20
25 ± 3 {2.55 ± 0.31}
35 ± 4 {3.57 ± 0.41}
55 ± 6 {5.61 ± 0.61}
75 ± 8 {7.65 ± 0.82}
00 Index and foreword
Foreword, safety and general information
8 ± 2 {0.81 ± 0.20}
In aluminum
Tightening torque (Nm {kgm})
5 ± 1 {0.51 ± 0.10}
15 ± 2 {1.53 ± 0.20}
20 ± 2 {2.04 ± 0.20}
25 ± 3 {2.55 ± 0.31}
35 ± 4 {3.57 ± 0.41}
45 ± 5 {4.59 ± 0.51}
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