Stihl MS 500i - Removing the Piston; Installing the Piston

MS 500i 55
N If necessary, remove the antivibration element from
the cylinder, @ 17.2.
N Remove screws (1).
N Remove cylinder (2).
N Remove gasket (3).
27.3 Removing the piston
To remove the compression rings (9 and 10), the piston
(4) does not have to be removed.
N Remove cylinder, @ 27.2.
When removing the piston (4), the scavenging ramp
(arrow) on the crankcase may be damaged. A damaged
scavenging ramp can result in a serious damage to the
engine.
Remove the piston (4) so that the scavenging ramp
(arrow) on the crankcase is not damaged.
N Prize the snap ring (5) out at the recess (arrow).
N Drive the piston pin (7) out of the piston (4) with the
mounting bolt 1108 893 4700.
N If the piston pin (7) cannot be pressed out: Hold piston
(4) against it and knock out piston pin (7) with slight
blows on the mounting bolt 1108 893 4700.
N Remove piston (4).
N Pull needle cage (6) out of connecting rod.
N Remove compression rings (9 and 10).
N If the compression rings (9 and 10) are damaged:
Replace compression rings (9 and 10).
The snap ring (8) does not need to be removed.
27.4 Installing the piston
N Install compression rings (9 and 10).
N Wet the needle cage (6) with oil and push it into the
connecting rod.
N Place the piston (4) on the connecting rod so that the
arrow on the piston crown (arrow) points in the
direction of the bumper spike.
N Push the mounting bolt 1108 893 4700 (12) through
the hole in the piston (4) and the needle cage (6) in
the connecting rod.
N Coat the piston pin (7) with oil.
N Place the piston pin (7) on the pin of the mounting bolt
1108 893 4700 (12) and push it into the piston (4) as
far as it will go (arrow).
4
0000-GXX-5641-A0
4
7
5
0000-GXX-5642-A0
9,10
0000-GXX-5643-A0
7
12
4
0000-GXX-5644-A0