Stihl MS 240 Instruction Manual page 43

2
: The crankshaft (1), connecting
rod (2) and needle bearing form
an inseparable unit. Always
replace as a complete unit.
– Check the two halves of the
crankcase and ball bearings and
replace if necessary, b 8.6.2
Before installing, clean the
crankshaft with a standard
commercial, solvent-based
degreasant containing no
chlorinated or halogenated
hydrocarbons.
Installing – ignition side
Take care not to damage the
crankshaft stub.
Inspect and clean the sealing faces
on the ignition side of the crankcase
(including the cylinder sealing face)
– the sealing faces must not be
damaged in any way.
42
1
– Position the tapered stub of the
crankshaft (arrow) above the ball
bearing at the ignition side.
Wear protective gloves to reduce
the risk of burn injury.
– Heat the inner bearing race to
about 150°C (300°F).
: Push the crankshaft into the ball
bearing at the ignition side as far
a stop.
This operation must be carried out
very quickly because heat is
absorbed by the crankshaft, and the
inner bearing race shrinks.
1
If it is not possible to heat the inner
bearing ring, use the drilled plate
5910 893 2102 to install the
crankshaft.
: Screw the screw sleeve (1)
5910 893 2421 as far as stop
onto the fully extended spindle of
service tool (2) 5910 893 2101.
Coat tapered stub of crankshaft
with oil.
: Position the tapered stub of the
crankshaft (arrow) above the ball
bearing at the ignition side and
push it home.
MS 240, MS 260, MS 260 C
2
.