STIHL 064, 066 27
4.3.2 Installation
Top: Top: Top:
Removing snap ring Pushing out piston pin Fitting needle cage
Bottom: Bottom: Bottom:
Assembly drift 1110 893 4700 Piston rings Arrow on piston head points toward muffler
Important: Before removing the - Now use the assembly drift to - Thoroughly clean the gasket seat-
piston, decide whether or not the push the piston pin out of the pis- ing surface on the cylinder. Lubri-
crankshaft has to be removed as ton. If the piston pin is stuck, tap cate the needle cage with oil and
well. To remove the flywheel and the end of the drift lightly with a fit it in the small end.
clutch, block the crankshaft by hammer if necessary. Important:
sliding the wooden assembly block Hold the piston steady during this - Heat the piston on an electric
between the piston and crankcase. process to ensure that no jolts heating plate to approx. 60 °C
are transmitted to the connecting (140 °F) and slip it over the con-
- Use a scriber or similar tool to rod. Remove the piston and take necting rod so that the arrow on
ease the hookless snap rings out the needle cage out of the con- the piston head points toward the
of the grooves in the piston necting rod. exhaust muffler.
bosses.
- Inspect piston rings and replace
if necessary - see 4.4.
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