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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 is a barrel face and the
second ring has a tapered face.
The oil ring is designed for better sealing and less
Fig.
4-4
oil consumption, in combination with
3
pieces.
TOP
BARREL
@
RING
TAPER
@
RING
OIL
COMBINATION
@
RING
RING
4-6
CAMSHAFT
The camshaft for the D-type engine is made of
special cast iron and camshaft gears are casted
together in one piece.
Both sides
of
the shaft fit into the plane bearings
on the crankcase and main bearing cover.
The camshaft for B-type engine is made of forged
carbon steel and also functions as
PTO
shaft.
Cam gear
is
press fitted on the shaft and ball bear-
ings are employed on the both sides for support-
ing the shaft.
I
I
Fig.
4-5
Fig.
4-6
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8-