Installation - Stihl 064 Service Manual

STIHL 064, 066
Top:
Removing snap ring
Bottom:
Assembly drift 1110 893 4700
Important: Before removing the
piston, decide whether or not the
crankshaft has to be removed as
well. To remove the flywheel and
clutch, block the crankshaft by
sliding the wooden assembly block
between the piston and crankcase.
- Use a scriber or similar tool to
ease the hookless snap rings out
of the grooves in the piston
bosses.
Top:
Pushing out piston pin
Bottom:
Piston rings
- Now use the assembly drift to
push the piston pin out of the pis-
ton. If the piston pin is stuck, tap
the end of the drift lightly with a
hammer if necessary. Important:
Hold the piston steady during this
process to ensure that no jolts
are transmitted to the connecting
rod. Remove the piston and take
the needle cage out of the con-
necting rod.
- Inspect piston rings and replace
if necessary - see 4.4.

Installation

4.3.2
Top:
Fitting needle cage
Bottom:
Arrow on piston head points toward muffler
- Thoroughly clean the gasket seat-
ing surface on the cylinder. Lubri-
cate the needle cage with oil and
fit it in the small end.
- Heat the piston on an electric
heating plate to approx. 60 °C
(140 °F) and slip it over the con-
necting rod so that the arrow on
the piston head points toward the
exhaust muffler.
27