Piston Rings - Stihl SR 430 Manual

– Inspect the piston rings and
replace if necessary, b 4.8.1
– Install the crankshaft, b 4.6
– Install the engine, b 4.5
– Reassemble all other parts in the
reverse sequence.
SR 430, SR 450
4.8.1

Piston Rings

– Remove the piston, b 4.8
– Remove the piston rings from the
piston.
: Use a piece of old piston ring to
scrape the grooves (arrows)
clean.
: Position the new piston rings in
the groove so that the
radii (arrows) at the ring gaps
face upwards.
: Position the piston rings so that
the radii at the ring gap meet at
the fixing pin in the piston
groove (arrows).
– Check correct installed position
of the piston rings (arrows).
– Install the piston, b 4.8
– Reassemble all other parts in the
reverse sequence.
29