Stihl FR 450 - Page 17

•
Use installing tool (1)
5910 890 2208 to fit the snap
rings.
Note: For instructions on how to
use the installing tool see
"Standard Repairs, Trouble-
shooting" handbook.
•
Fit new cylinder gasket on the
crankcase.
•
Lubricate piston and piston rings
with oil. Rest piston (1) on
wooden assembly block (2)
1108 893 4800.
•
Position the piston rings so that
the radii at the ring gap meet at
thefixingpininthepistongroove
when the rings are compressed.
•
Use the clamping strap (1)
0000 893 2600 to compress the
piston rings around the piston
and check that the piston rings
are correctly positioned.
- Lubricate the inside of the
cylinder with oil and line it up so
that it is positioned as it will be in
the installed condition. It is im-
portant to observe this point as
the piston rings might otherwise
break.
•
Slide the cylinder over the piston
- the clamping strap is pushed
downward as the piston rings
slip into the cylinder.
- Remove the clamping strap
and wooden assembly block.
- Line up the cylinder and gasket.
•
Use socket (1) 0812 542 2104
to tighten down cylinder base
screws to 8.5 Nm (6.3 lbf.ft).
Assemble all other parts in the
reverse sequence.
250RA042
VA
250RA041
1
2
VA
250RA040
VA
250RA036
1
VA
250RA043
1
VA
250RA044
VA
250RA045
1
VA
16 FS 120, 200, 300, 350, 400, 450, FR 350, 450