Appendix
Standard tightening torques
5.3 Standard tightening torques
5.3.1 Lubricant and threadlocker application rules
Application method Product
Lubricant
Apply lubricant under the screw
head and on the first third of the
thread.
MG = Molykote G-n-plus
MW = Castrol Optimol paste white T
MH = Molykote HSC
O = Engine oil
Threadlocker
Apply threadlocker on the first
third of the thread.
XX = Loctite 243
YY = Loctite 577
Tab. 56: Lubricant and threadlocker application rules
5.3.2 Screws pre-tightening, reuse, and marking
NOTICE
Property damage by improper pre-tightening, turning angle or reuse of screws or nuts.
Improper pre-tightening, turning angle or reuse of screws or nuts could lead to the rupture of
the screw or nut and lead to property damage by malfunction, ejection, fall or tilting of compo‐
nents.
u Respect the following pre-tightening, turning angle, reuse and marking specifications.
u In case of failure or damage, replace any threaded fastener immediately by the authorized
personnel.
Information
The values of the pre-tightening torque and the turning angle are specified in the maintenance
tasks.
Unless otherwise noted, use the standard torque values into the column of screws quality class
“8.8” to tighten screws and bolts.
The screws quality classes “10.9” and “12.9” are always indicated with the “Nm” symbol.
268
© 2022 by Kohler Co. All rights reserved.
KD62V12 33525088601_8_1 EN_US
2022-09
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