Tightening Torquese - Stihl MS 461 Manual

2.5

Tightening Torquese

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.
Use the following procedure when refitting a DG or P screw in an existing thread:
Insert the screw in the hole and rotate it counterclockwise until it drops down slightly and engages in the existing
thread. Tighten the screw clockwise to the specified torque.
This procedure ensures that the screw engages properly in the existing thread and does not form a new thread
and weaken the assembly.
Before reinstalling a micro-encapsulated screw, clean both threads (screw tap into female thread by hand and
then blow out with compressed air, clean male thread with brush), coat clean screw with medium strength
Loctite 242 or 243.
Power screwdriver setting for polymer: P and DG screws max. 500 rpm.
Do not use an impact wrench for releasing or tightening screws.
Do not mix up screws with and without binding heads.
Fastener
Screw
Screw
Collar screw
Screw
Screw
Collar nut
Collar nut
Screw
Screw
Screw
Screw
Screw
Screw
Screw
Screw
Nut
Locknut
Screw
6
Thread size For component
M 4x8 Chain tensioner cover plate/crankcase
M 4x12 Brake band/crankcase
M 8x21.5 Collar stud / crankcase, for bar
M 4x12 Cover, chain brake/crankcase
M 4x12 Cover, oil pump/crankcase
M 10x1 Decompression valve
M 5 Filter cover / twist lock
M 5 Flange / filter base / carburetor
M 4x10 Flange / crankcase
M 4x12 Generator / crankcase
P 6x21.5 Handlebar, top / tank housing
P 6x32.5 Handlebar, top / tank housing
P 6x19 Handlebar, bottom / tank housing
P 4x19 Handle Molding
M 5x35x22 Hand guard, left
M 5x23 Shroud / crankcase
M 5 Shroud / cylinder
M 5 Chain catcher / spiked bumper
M 5x20 Chain catcher / spiked bumper / crankcase,
bottom
Torque Remarks
Nm
3.0
3.0 4), 5)
23.0 2)
3.0 4), 6)
3.0 4), 6)
14.0
1.0
3.5
2.5 5)
3.0 4), 5), VW
8.0 3)
8.0 3), R
8.0 3)
1.6
7.0 4), 6)
6.0
3.5
6.0 R
8.0 5)
MS 461, MS 461-R