Komatsu PC500LC-10R Shop Manual page 70

STANDARD TIGHTENING TORQUE TABLE
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))
REMARK
Tighten the National taper pipe threaded (NPT) screws used on the 102, 107, and 114 series engines to the
torques shown in the following table unless otherwise specified.
Material of female screw
Nominal thread size
1
/
16
1
/
8
1
/
4
3
/
8
1
/
2
3
/
4
00-68
Tightening torque ( Nm { kgm} )
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
8±2 {0.81±0.20}
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 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}
PC500LC-10R