Piston Rings - Stihl MS 261 User Manual

: Press the installing tool
downwards into the sleeve until
the magnet butts against the end
of the guide slot.
Use a suitable base.
: Remove the sleeve and slip it
onto the other end of the shank –
the inner pin must point towards
the flat face.
1
Fit the snap ring (1) so that its
gap (arrow) is on the piston's
vertical axis (it must point up).
50
: Apply the installing tool
5910 890 2210 with the sleeve's
taper against the piston boss,
hold the piston steady, center the
tool shank exactly and press
home until the snap ring slips into
the groove.
Make sure the tool shank is held
square on the piston pin axis.
– Inspect the piston rings and
replace if necessary, b
– Install the cylinder, b 6.5
– Reassemble all other parts in the
reverse sequence.
6.8

Piston Rings

– Remove the piston, b
– Remove the piston rings from the
piston.
: Use a piece of old piston ring to
scrape the grooves (arrows)
clean.
b 6.8
: Position the new piston rings so
that the radii face
upward (arrows).
b 6.7
MS 261, MS 261 C