Stihl MS 390 User Manual

31MS 290, MS 310, MS 390
The cylinder can be removed
without having to take the engine
pan out of the housing.
– Remove the engine, b 6.5
: Lift the crankshaft and pull the
piston out of the cylinder at the
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VA
same time.
: Loosen the clamp (1).
: Pull the manifold (2) off the intake
port.
: Disconnect the impulse hose (3).
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2
3
1
: Remove the oil seals (2).
: Inspect ball bearings (1) and
replace if necessary, b 6.7
– Inspect the cylinder and
crankshaft for damage and
replace if necessary.
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1
2
– Inspect the piston and piston
rings for damage and replace if
necessary, b 6.5.2
If a new cylinder has to be installed,
always fit the matching piston with
piston rings.
– Thoroughly clean all residue of
sealant from the cylinder and
engine pan mating faces.
: Push oil seals (1) into position.
– Apply a thin coating of sealant to
the outer diameters of the oil
seals, b 13.
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1
– Lubricate piston and piston rings
with oil.
: Position the piston rings so that
the radii at the ring gap meet at
the fixing pin in the piston groove
when the rings are compressed.
6.5.1 Cylinder

Stihl MS 390 Specifications

General

Brand	Stihl
Model	MS 390
Category	Chainsaw
Language	English