Yanmar 3TNV Series, Service Manual

Page: 212 / 213

13. Tightening Torque for Bolts and Nuts
197
13.2 Tightening Torques for Standard Bolts and Nuts
Item
Nominal thread diameter
pitch
Tightening torque
Nm(kgf-m)
Remarks
M6 1
9.8 11.8
(1.0 1.2)
M8 1.25
22.6 28.4
(2.3 2.9)
M10 1.5
44.1 53.9
(4.5 5.5)
M12 1.75
78.4 98.0
(8.0 10)
M14 1.5
127.5 147.1
(13 15)
Hexagon bolt (7T)
and nut
M16 1.5
215.7 235.4
(22 24)
Use 80% of the value at left
when the tightening part is
aluminum.
Use 60% of the value at left for
4T bolts and lock nuts.
1/8
9.8
(1.0)
1/4
19.6
(2.0)
3/8
29.4
(3.0)
PT plug
1/2
58.8
(6.0)
-
M8
12.7 16.7
(1.3 1.7)
M10
19.6 25.4
(2.0 2.6)
M12
24.5 34.3
(2.5 3.5)
M14
39.2 49.0
(4.0 5.0)
Pipe joint bolt
M16
49.0 58.8
(5.0 6.0)
-
Note) Lubricating oil is not applied to threaded portion and seat surface.