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4-
3
CRANKSHAFT
The crankshaft
is
forged carbon steel, and the
crank pin
is
induction-hardened. The output end
of the shaft has a crankshaft gear and balancer
gear that are pressed into position.
(See
Fig.
3.)
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 carries two compression rings and
one
oil ring.(See
Fig.
4.)
4-5
PISTON RINGS
The
Piston rings are made
of
special cast
iron.
The
profile
of
the
top
ring
is
barrel
face
and
tile
SWOJI~
ring
has
a
tapered
face
with
an
mder
-
CUT:.
'l'he
oil
ring
consists
of
a
cutter
ring
and
a
coil expander
far
better
sealing
and
less
oil
(xmsumption.
B
TYPE
/
D
TYPE
Fig.
3
Fig.
4
.TOP
RING
SECOND
RING
OIL RING
Fig.
5
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