Service and Repair Manual
Appendix
Standard tightening torques
Some nuts and screws are marked to track their reuse:
–
Fuel and HP injections pipes
–
Cutting rings
If 2 punchs appears,
u
Replace pipe or system after each untightening.
If none or 1 punch appears,
u
Add one punch after each untightening.
5.3.3 Standard torques for hexagonal / socket / flange screws and
hexagonal / flange nuts
Information
Tolerances of the indicated tightening torques: 10 %.
Values apply only to screws with coating and without lubricant.
For hexagonal screws in accordance with:
– ISO 4014
– ISO 4017
For socket screws in accordance with:
– ISO 4762
For flange screws in accordance with:
– EN 1665
For hexagonal nuts in accordance with:
– ISO 4032 / ISO 4034 / ISO 4035
For flange nuts in accordance with:
– EN 1664
Thread
diam-
eter
Quality class 8.8
Quality class 10.9
Hexag-
onal
screw
Socket
screw
Hexag-
onal
nut
Flange
screw
Flange
nut
Hexag-
onal
screw
Socket
screw
Hexag-
onal
nut
Flange
screw
Flange
nut
M6
9 Nm
7 ft-lb
14 Nm
10 ft-lb
M8
22 Nm
16 ft-lb
33 Nm
24 ft-lb
M10
43 Nm
32 ft-lb
63 Nm
46 ft-lb
M12
70 Nm
52 ft-lb
75 Nm
55 ft-lb
100 Nm
74 ft-lb
110 Nm
81 ft-lb
M16
165 Nm
122 ft-lb
183 Nm
135 ft-lb
240 Nm
177 ft-lb
270 Nm
199 ft-lb
KD83V16 33525088901_2_1 EN_US
2021-07
© 2021 by Kohler Co. All rights reserved.
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