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4-4
CONNECTING
ROD
AND PISTON
The connecting rod is forged aluminum alloy, and
its large and small ends function as bearings.
The piston is an aluminum alloy casting, and car-
ries
two
compression rings and one oil ring.
Fig.
4-4
4-5
PISTON
RINGS
The piston rings are made of special cast iron.
The profile of the top ring is barrel face and the second ring has a tapered face.
The oil ring is designed for better sealing and less oil consumption, in combination with
3
pieces.
TOP
@
RING
BARREL
@
TAPER
RING
@
RING
RING
OIL
COMBINATION
Fig.
4-5
4-6
CAMSHAFT
The camshaft is made of special cast iron and
camshaft
gears are casted together in one piece.
Each
2
cam robs are provided for intake and ex-
haust valves correspondingly.
Both sides of the shaft
fit
into the plane bearings
on the crankcase and main bearing cover.
Fig.
4-6
-
7-