Installation - Stihl FS 120 Service Manual

1 2
•
Now use the assembly drift (2)
1110 893 4700 to push the pis-
ton pin (1) out of the piston.
Note: 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 trans-
mitted to the connecting rod.
 Remove piston and take the
needle cage out of the connect-
ing rod.
•
Inspect piston rings and replace
if necessary - see 4.6.
)6       )5  
4.5.2

Installation

1 2
3
2
•
Thoroughly clean the gasket
seating surface (1).
•
Check that adapter sleeves (2)
are in place. Fit them if necess-
ary.
•
Lubricate the needle cage (3)
with oil and fit it in the connecting
rod.
1
•
To simplify assembly, heat the
piston and slip it over the con-
necting rod.
•
Installed position of piston:
1 = Marking
2 = Flywheel
•
Push the assembly drift, small
diameter first, through the piston
and small end (needle cage) and
line up the piston.
1
•
Fit the piston pin (1) on the
assembly drift (2) and slide it
into the piston (the pin slides
home easily if the piston is hot).
2
a
b
•
Modify sleeve of installing tool
5910 890 2210 as shown in
drawing.
a = 30 degrees
b = Ø 10 mm
2