Stihl MS 311 Manual page 35

– Lubricate the piston, piston rings
and cylinder wall with oil.
: Position the piston rings so that
the radii at the ring gap meet at
the fixing pin in the piston groove
(arrows) – there is otherwise a
risk of ring breakage.
– Line up the piston with crankshaft
before fitting them in the cylinder.
Viewed from the exhaust
port (arrow), the long crankshaft
stub (1) must be on the right.
34
1
When properly aligned, the piston
rings are compressed by the
cylinder's taper.
: Carefully push the piston with
crankshaft (1) into the cylinder.
1
– Place the crankshaft with
bearings and oil seals in the
bearing seats, making sure the oil
seals are firmly against their
stops (arrows) in the cylinder.
– Inspect and clean the sealing
face on the engine housing and
remove any gasket residue,
b 14
The sealing faces must be in perfect
condition. Always replace
components with damaged sealing
faces.
: Apply sealant to the groove in the
sealing face, b 14
2
1
– Hold the crankshaft (1) steady.
: Fit the cylinder (2) with
crankshaft (1) in the engine
housing.
MS 311, MS 391