Filter
Top Products
4.
GENERAL
DESCRIPTION
of
ENGINE CONSTRUCTION
4-1
CYLINDER, CRANKCASE
The cylinder and crankcase are single piece alumi-
num die casting. The cylinder liner, made of special
cast iron, is built into the alminum casting. The in-
take and exhaust ports are located on one side of
the cylinder, and are also inserted into the casting.
The
crankcase is separable on the output shaft side,
where the main bearing cover is attached
to
it.
(See Fig.
I
.)
4-2
MAIN BEARING COVER
Fig.
1
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 on the machines.
Two
oil drains are also available. (See Fig.
2
and Fig.
3.)
Oil
Fig.
2
4-3
CRANKSHAFT
The crankshaft
is
forged
of
carbon steel, and the
crankpin
is
induction-hardened. It has a crank gear
and
a
oil
scraper press-fitted
on
the output end.
(See Fig.
4.)
r
Governor Gear
Fig.
3
Induction Hardening
/(Portion
of
Crankpin)
Crank
Gear
/
\
O;I
Scraper
(Press-fit)
(Press-fit)
Fig.
4
-4
-