Robin EH09D, Service Manual, Page: 12 / 84

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4-4 CONNECTING ROD AND PISTON
The connecting rod is an aluminum alloy die-cast-
ing and its large and small ends function as bear-
ings.
The piston is an aluminum alloy casting, and car-
ries two compression rings and one oil ring.
4-5 PISTON RINGS
The piston rings are made of special cast iron.
The profile of the top ring and the second ring are
shown in the illustration.
The oil ring is designed for better sealing and less
oil consumption.
4-6 CAMSHAFT
The camshaft is made of special cast iron, and
camshaft and gear are cast together in one piece.
Both sides of the shaft fit into the plain bearings
on the crankcase and main bearing cover.
Fig. 4-4
Fig. 4-6
Model: EH09D
Model: EH12-2D
Fig. 4-5
TOP
RING
OIL
RING
1
3
BARREL
EH09D
EH12-2D
EH09D
EH12-2D
EH09D
EH12-2D
TAPER
CUTTER RING WITH
COIL EXPANDER
CUTTER RING
SECOND
RING
2
TAPER
UNDER CUT
①
②
③