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4.
GENERAL DESCRIPTION
OF
ENGINE COMPONENTS
4-1
CYLINDER AND CRANKCASE
The cylinder and crankcase is a single piece alu-
minum die-casting.
The cylinder liner, made of special cast iron, is
molded into the aluminum casting.
The crankcase has a mounting surface on the out-
put shaft side, where the main bearing cover is
attached.
I
Fig.
4-
1
4-2
MAIN BEARING
COVER
The main bearing cover is an aluminum die-cast-
ing, which is mounted on the output shaft side of
the crankcase.
Remove the main bearing cover to inspect inside
e
of
the engine.
Pilots and bosses are machined
on
the cover for
direct mounting
of
the engine onto such machines
as generators and pumps.
Oil gauges (fillers) are on both sides of the cover
for easy maintenance.
I
OilGAUGE
-
Fig.
4-2
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.
Fig.
4-3
-
7-