5-2-2 ENGINE
(1) CYLINDER and CRANKCASE
The cylinder and the crankcase of the engine are of a one-piece aluminum die-cast design. The cast iron cyl-
inder liner is molded inside the cylinder. Both the intake and exhaust ports are positioned at the lateral side
of the cylinder and these parts are formed by using a mold with die-cast cores. The crankcase has its joint
face located on the generator side.
(2) MAIN BEARING COVER
The main bearing cover is aluminum die-cast and is mounted on the generator side. By removing the main
bearing cover, the interior of the engine can be inspected.
(3) CRANKSHAFT
The crankshaft is constructed of forged carbon steel. The crankpin is induction-hardened and has a press-
fitted crank gear located on the generator side of the engine.
(4) CONNECTING ROD and PISTON
The connecting rod is constructed of forged aluminum alloy with both the large and small ends utilized as
bearings. The oil scraper and large end cap are molded together. The aluminum alloy casting piston has two
compression rings and one oil ring.
(5) CAMSHAFT
The camshaft is constructed of special cast iron and has intake and exhaust valve drive cams, each of which
engages with the cam gear. An exclusive aluminum alloy is used on each end of the camshaft in the place of
bearings.
(6) VALVE ARRANGEMENT
The intake valve is installed at the oil port side and the exhaust valve at the generator side.
(7) CYLINDER HEAD
The cylinder head is die-cast aluminum and has Ricardo type combustion chamber featuring greater volume
capacity for improved combustion efficiency. For easier spark plug maintenance, the cylinder head is posi-
tioned at an angle to allow greater access.
(8) GOVERNOR
The centrifugal weight type governor ensures constant engine speed, regardless of load fluctuations (the
governor is mechanically linked to the governor drive gear).
(9) EXHAUST FAN COOLING SYSTEM (See Fig. 5-5.)
Instead of blowing outside air on the engine, the Exhaust Fan Cooling System of this generator intakes the
cool air and forces the hot air outside from one outlet.
This keeps the body temperature lower for greater safety and extends service life.
(10) LUBRICATION SYSTEM
The moving and sliding parts inside the engine are lubricated with the oil scraper fitted on the connecting
rod. As the crankshaft rotates, the connecting rod moves up and down and the oil scraper moves in conjunc-
tion with the connecting rod movements to scrape up oil in the crankcase and splash it over the surfaces of
the moving and sliding parts.
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