Installing - Stihl MS 270 User Manual

– If a new cylinder has to be
installed, always fit a new
matching piston.
– Before removing the piston,
decide whether or not the
crankshaft has to be removed as
well. The crankshaft has to
blocked to remove the flywheel
and clutch by resting the piston
on the wooden assembly block
with the cylinder removed or
loosened.
– Remove the clutch – see
– Remove the flywheel –
Remove the hookless snap rings
from the piston.
Wear safety glasses to protect
your eyes when working with snap
rings.
MS 270, MS 280
2
Use the assembly drift (2)
1108 893 4700 to push the piston
5.3. pin (1) out of the piston.
see 7.3. If the piston pin is stuck, tap the end
of the drift lightly with a hammer if
necessary.
Hold the piston steady during this
process to ensure that no jolts are
transmitted to the connecting rod.
– Remove the piston from the
connecting rod and take the
needle cage out of the small end.
– Inspect the piston rings and
replace if necessary –
2
Thoroughly clean the gasket
seating surface (1).
Lubricate the needle cage (2)
with oil and fit it in the small end.
6.5.2

Installing

1
1
2
Note installed position of piston:
1 = Arrow
2 = Flywheel
The arrow mark must point towards
the muffler.
see 6.6.
1
1
Push the assembly drift
1108 893 4700, small diameter
first, through the piston and small
end (needle cage) and line up the
piston.
39