Installation - Stihl FS 120 Manual

5/20/2018
1
Now use the assembly drift (2)
•
1110 893 4700 to push the pi-
ston 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 connec-
ting rod.
Inspect piston rings and replace
•
if necessary - see 4.6.
FS 120, 200, 300, 350, 400, 450, FR 350, 450
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4.5.2
2
3
A
V
3
3
0
A
R
0
5
2
Thoroughly clean the gasket
•
seating surface (1).
Check that adapter sleeves (2)
•
are in place. Fit them if necessa-
ry.
Lubricate the needle cage (3)
•
with oil and fit it in the connecting
rod.
A
V
4
3
0
A
R
0
5
2
To simplify assembly, heat the pi-
•
ston and slip it over the connec-
ting rod.
Installed position of piston:
•
1 = Marking
2 = Flywheel

Installation

1 2
2
1 2
A
V
5
3
0
A
R
0
5
2
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).
a
b
A
V
7
3
0
A
R
0
5
2
Modify sleeve of installing tool
•
5910 890 2210 as shown in dra-
wing.
a = 30 degrees
b = Ø 10 mm
A
V
8
3
0
A
R
0
5
2
2
A
V
9
3
0
A
R
0
5
2
A
V
7
5
0
A
R
0
5
2
15
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