4.
GENERAL DESCRIPTION
OF
ENGINE
CONST
4-1
CYLINDER
AND
CRANKCASE
The cylinder and crankcase are single piece
aluminum die casting. The cylinder liner,
made of special cast iron, is built into
the alminum casting.
The crankcase is separable
on
the output
shaft side, where the main bearing cover
is
attached to
it.
(See
Fig.
1.)
4-2
MAIN
BEARING COVER
The main bearing cover made
of
aluminum
die casting is built onto the output shaft
side of the crankcase
so
that the inside
of the engine can readily be checked by
simply removing the cover. It is provided
with a flange and
boss
for directly
mounting machines, such
as
generators
and pumps.
Two oil gauges also serving
as
oil filler
caps can be mounted.
(See Fig.
2)
4-
3
CRANKSHAFT
Crankshaft is made from forged carbon
steel and its crankpin and journal are
induct ion
-
hardened.
Crankshaft
is
supported
by
a ball bearing
at flywheel side and a kelmet bearing at
P.T.0:
side.
A
passage for lubricating oil is provided
through the journal and crankpin to
lubricate the large end bearing of
connecting rod.
The crank gear is pressure-fitted
on
the
P.T.O. side of the crankshaft.
A
balancer gear is also pressure-fitted
for the engines with optional balancer.
(See Fig.
3.)
~~
FIG.
2
FIG.
3
-5-
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