Stihl MS 280 - Page 7

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7MS 270, MS 280
Fastener Thread For component Torque Remarks
size Nm
Spline screw IS-DG5x24 Fan housing/crankcase 9.0
Spline screw IS-DG5x24 Fan housing/bearing plug 4.0
Clutch carrier M12x1L Carrier/crankshaft 50.0
Spline screw IS-DG5x18 Muffler/cylinder 9.0
Nut M8x1 Flywheel/crankshaft 28.0
Pan head screw M4x8 Inner side plate 3.0
1)
Collar screw M8SK6 Dihedral sleeve/crankcase/bar guide 30.0
1) 6)
Spline screw IS-M5x28 Cylinder/crankcase 9.0
Spark plug M14x1.25 Spark plug 25.0
Spline screw IS-DG4x20 Ignition module/cylinder 4.0
Spline screw IS-DG4x16 Oil pump/crankcase 3.0
Remarks:
1) Only machines with quick chain adjuster
6) Secure screw with Loctite 270
Screws secured with adhesive are easier to loosen if the adhesive is heated first with a hot air blower.
Exercise caution on polymer components.
Use the following procedure to fit a P (Plastoform) screw in an existing thread:
– Place the P screw in the hole and rotate it counterclockwise until 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,
which would weaken the assembly.
Power screwdriver speed setting for polymer:
– P screws: max. 500 rpm