RING-SEAL 7G4822 - Caterpillar

Intended Use
This Power Generator is used to generate electrical power.Engine Description
The 3412C Generator Set engine is a 12 cylinder engine. The direct injection engine has a four stroke cycle. Each cylinder head has two inlet valves and two exhaust valves. The rocker arms and the valves are actuated by the camshaft. Mechanical lifters and pushrods perform the function.A hydramechanical governor or an electronic control, controls the output of the fuel injection pump. The operator maintains the engine rpm. The fuel injection pump meters and injects the fuel. The high-pressure gaseous fuel is pumped to the fuel injection nozzles. The mechanical timing advance provides the best fuel injection timing over the full range of engine speeds.Inlet air is filtered by the air cleaner. The air is compressed by the turbocharger before the air enters the cylinders. The turbocharger is driven by the engine exhaust. The standard engine is turbocharged, available with aftercooling or no aftercooling.The cooling system consists of the following components:
A gear-driven centrifugal pump
One water temperature regulator which regulates the engine coolant temperature
An oil cooler
A radiator which incorporates a shunt systemThe engine lubricating oil is cooled and the engine lubricating oil is filtered. The engine lubricating oil is supplied by a gear-driven pump. If the oil viscosity is high or if the oil cooler and oil filter elements become plugged, bypass valves provide unrestricted flow of lubrication oil to the engine.Engine efficiency and engine performance depend on adherence to proper operation and maintenance recommendations. Use the recommended fuel, lubrication oil, and coolant. Special attention should be given to the air cleaner, to the fuel system, to the lubrication system, and to the cooling system maintenance. Refer to the Operation and Maintenance Manual, "Maintenance Interval Schedule" for more information on maintenance items.Engine Specifications
Note: The front end of the engine is opposite the flywheel end of the engine. The left and the right side of the engine are determined from the flywheel end.
Illustration 1 g00291566
Cylinder and valve locations
(A) Inlet valves
(B) Exhaust valves
Table 1
3412C Engine Specifications
Cylinders and Arrangement 12 cylinder vee block
Bore 137 mm (5.4 inch)
Stroke 152.4 mm (6.00 inch)
Aspiration Turbocharged (T), Twin Turbocharged (TT), Twin Turbocharged Aftercooled (TTA), Series Turbocharged Aftercooled (STA)
Displacement 27 L (1648 cu in)
Firing Order 1-4-9-8-5-2-11-10-3-6-7-12
Rotation (flywheel end) Counterclockwise
Valve Lash (inlet) 0.38 mm (0.0150 inch)
Valve Lash (exhaust) 0.76 mm (0.030 inch) Generator Description
The SR4B brushless generator and SR500 generator are used with the following loads: mixed loads of motors and lights, SCR-controlled equipment, computer centers, installations of communications and petroleum drilling applications. The elimination of the brushes in the field circuit reduces maintenance. The elimination of the brushes in the field circuit increases reliability. The elimination of brushes provides a higher degree of protection in potentially hazardous atmospheres.The generator set packages can be utilized for prime power generation or standby power generation. The generator set packages can be used in land-based applications or marine applications.SR4B generators are utilized in three-phase full-wave excitation and regulation. The generators are either four pole or six pole