Caterpillar 3406 Engine Specifications

by Chester Rockwell

Caterpillar is a United States-based manufacturer of industrial and heavy equipment vehicles, engines and parts. The 3406 line of engines is designed for use in heavy boats and can be used alone as a single engine, or in groups to generate mass amounts of power. It can be commonly found in large yachts, cruise ships and freight transportation vessels.

Engine Specifications

At the core of the 3406's power generation is an inline six-cylinder, four-stroke diesel engine. With an overall displacement of 893 cubic inches, it is engineered with a 5.4-inch bore and 6.5-inch stroke. An onboard turbocharger helps deliver continuous power at the engine's maximum engine speed of 1,500 RPM. Caterpillar recommends changing the oil at every 250-hour interval.

Power Generation Specifications

Attached to the turbo-diesel engine is the power generator, which uses a permanent magnet with four poles and a single bearing. A three-phase voltage regulator is installed onboard that senses both volts and hertz. The generator is mounted next to the engine in a large metal frame with meta cross-supports. Under 92-percent engine load, the generator outputs the equivalent of 313.8 horsepower.

Standard Equipment

The engine and generator set include a number of standard features, including a cooling system, exhaust system, lube system and instrument panel. The engine's air intake is plated with a corrosion-resistant coating and has a built-in air filter. A gear-drive sea water pump, expansion tank, and oil coolers for the transmission and engine serve as the core components for the engine's cooling system. Engine operators can check operating parameters, such as oil pressure and engine temperature, and manipulate some settings using the instrument panel.

Size and Weight

The 3406 has a total dry weight of 6,819 pounds without any engine accessories installed. Measuring from the end of the engine to the end of the flywheel housing, the length of the engine is 117.28 inches while the overall width is 39.22 inches. It has a total height that measures out to 58.04 inches. The addition of engine accessories available from Caterpillar, such as a different transmission, can slightly add to the size and weight of the generator set.

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