Tightening Torques - Stihl MS 231 Manual

2.5

Tightening Torques

DG and P (Plastoform) screws are used in polymer and light metal components. These screws form a
permanent thread when they are installed for the first time. They can be removed and installed as often as
necessary without impairing the strength of the screwed assembly, providing the specified tightening torque is
observed.
For this reason it is essential to use a torque wrench.
Fastener Thread size For component
Screw P 4x12
Screw P 5x18
Screw P 5x34
Screw P 4x12
Screw P 4x10
Collar screw D 8x18
Collar screw D 8x18
Collar screw D 9x18
Screw P 5x18
Nut M 5
Screw P 6x26.5
Screw M 5x16
Screw M 5x20
Screw M 5x14
Screw P 5x16
Screw D 4x12
Screw D 5x18
Screw P 5x18
Screw P 4x12
Carrier M 12x1 L
Screw P 6x28
Screw D 4x16
Screw M 5x16
Nut M 8x1
Screw P 4x10
6
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Chain tensioner cover
Antivibration element / engine housing
Antivibration element / tank housing
Brake band/engine housing
Brake cable retainer / tank housing
Collar stud for bar
Collar stud for bar
Collar stud for bar / engine housing
(repair solution)
Cover, chain brake / engine housing
Filter base / baffle / carburetor
Handlebar / tank housing, right
Handlebar / tank housing, bottom
Hand guard / fan housing / engine housing
Shroud / engine housing
Spiked bumper / engine housing
Manifold / cylinder
Bearing plug / cylinder
Fan housing / engine housing
Air baffle / engine housing
Carrier / crankshaft
Engine housing / bearing plug
Oil pump
Muffler / cylinder
Flywheel / crankshaft
Retainer
Torque
Nm
1.5
4.0
4.0
2.0
1.0
16.0
16.0
16.0
4.0
3.5
6.0
5.0
6.0
5.0
4.0
4.0
8.0
4.0
2.0
50.0
6.0
4.0
10.0
28.0
1.0
MS 231, MS 231 C, MS 251, MS 251 C
Remarks
Q
B
2), 3)
2)
1), 3)
1), 3)
1), 3)
2), 3)
4)