Komatsu 82E Series - Main Bolt and Nut Tightening Torques

13-2 82E-5 – 98E-5 SERIES
13. TIGHTENING TORQUE FOR BOLTS AND NUTS
13.1 Tightening Torques for Main Bolts and Nuts
Part and engine model
Thread diameter
x pitch
mm
Tightening torque
Nm {kgm}
Lubricating oil appli-
cation (thread portion,
and seat surface)
Reference
page
Cylinder head
bolt
3D82AE M9 x 1.25
61.7 – 65.7
{6.3 – 6.7}
Applied 4.2.4
(S)3D84E –
4D88E
M10 x 1.25
85.3 – 91.1
{8.7 – 9.3}
4D94LE,
(S)4D98E
M11 x 1.25
103.1 – 112.9
{10.5 – 11.5}
Connecting rod
bolt
3D82AE M8 x 1.0
37.2 – 41.2
{3.8 – 4.2}
Applied 4.4.4
(S)3D84E –
4D88E
M9 x 1.0
44.1 – 49.0
{4.5 – 5.0}
4D94LE,
(S)4D98E
M10 x 1.0
53.9 – 58.8
{5.5 – 6.0}
Flywheel set
bolt
3D82AE –
4D88E
M10 x 1.25
83.3 – 88.2
{8.5 – 9.0}
Applied 4.3.4
4D94LE,
(S)4D98E
M14 x 1.5
186.2 – 205.8
{19 – 21}
Bearing cap set
bolt
3D82AE M10 x 1.25
76.4 – 80.4
{7.8 – 8.2}
Applied 4.4.4
(S)3D84E –
4D88E
M12 x 1.5
93.2 – 98.1
{9.5 – 10.5}
4D94LE,
(S)4D98E
M11 x 1.25
108.1 – 117.9
{11.0 – 12.0}
Crankshaft
pulley set bolt
3D82AE –
4D88E
M14 x 1.5
112.7 – 122.7
{11.5 – 12.5}
Applied 4.3.4
4D94LE,
(S)4D98E
M14 x 1.5
107.9 – 127.5
{11.0 – 13.0}
Fuel nozzle set
bolt
3D82AE –
4D88E
M8 x 1.25
24.4 – 28.4
{2.5 – 2.9}
Not applied —
4D94LE,
(S)4D98E
M8 x 1.25
22.6 – 28.4
{2.3 – 2.9)
Fuel injection
pump drive
gear set nut
3D82AE –
4D88E
M14 x 1.5
78 – 88
{8 – 9}
Not applied 4.3.4
4D94LE,
(S)4D98E
M18 x 1.5
113 – 123
{11.5 – 12.5}
Fuel injection
pipe set bolt
3D82AE –
4D88E
M12 x 1.5
29.4 – 34.3
{3.0 – 3.5}
Not applied —
4D94LE,
(S)4D98E
M12 x 1.5
19.6 – 24.5
{2.0 – 2.5}
Fuel return
pipe joint bolt
4D94LE,
(S)4D38E
M6 x 1.0
7.8 – 9.8
{0.8 – 1.0)
Not applied —