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8
MS 780, MS 880
Fastener
Thread size For component
Torque
Nm
Remarks
Screw
M 6x40
Annular buffer, left top/retainer/tank housing
7.0
1), 4)
Screw
P 6x19
Annular buffer, bottom/tank housing
5.5
Screw
M 5x12
Annular buffer plate, left top/crankcase
9.0
1), 4)
Screw
M 4x12
Rewind spring, fan housing
4.0
4)
Screw
M 5
Muffler/collar stud with spring washer (MS
780/new MS 880)
10.0
Screw
M 5x16
Muffler/cylinder (MS 780/new MS 880)
10.0
1), 4), 5)
Screw
M 5x6
Muffler casing, top (MS 780/new MS 880)
6.5
1), 4)
Crankshaft
M 10x1
Flywheel/crankshaft
45.0
6)
Screw
M 4x12
Segment/fan housing
2.0
4)
Screw
M 4x8
Side plate/crankcase
3.0
4)
Screw
M 3x20
Clamp/manifold (MS 780/new MS 880)
0.5
Stud
M 5x8.5
Stud/cylinder
3.5
3)
Screw
M 5x16
Support/crankcase (old MS 880)
10.0
4)
Screw
M 5x16
Support/muffler (old MS 880)
10.0
4)
Screw
P 4x19
Tank housing/handle molding
1.0
Spark plug
M 14x1.25
Spark plug
25.0
Screw
M 5x25
Ignition module/crankcase (old MS 880)
9.0
1), 4)
Screw
M 5x20
Ignition module/crankcase
8.0
5)
Screw
M 6x30
Cylinder/crankcase
15.0
4)
Remarks:
1) Loctite 242 or 243, medium strength
2) Loctite 649, high strength
3) Loctite 270, high strength
4) Screws with binding head
5) Micro-encapsulated screws
6) Degrease joint and mount oil-free
7) Use Hylomar HYL sealant
Use the following procedure when refitting a DG or P screw in an existing thread:
Place the screw in the hole and rotate it counterclockwise until it drops down slightly.
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.
Coat micro-encapsulated screws with medium strength Loctite 242 or 243 before reinstalling.
Power screwdriver setting for polymer: DG and P 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.