Engine Description
The four engine cylinders are arranged in-line. The engines are controlled by a mechanically governed fuel injection pump.
The cylinder head assembly has one inlet valve and one exhaust valve for each cylinder. Each valve has one valve spring. The pistons have two compression rings and an oil control ring.
It is important to ensure the correct piston height so that the piston does not contact the cylinder head. The correct piston height also ensures the efficient combustion of fuel.
The crankshaft has five main journals. End play is controlled by thrust washers that are located on both sides of the center main bearing.
The timing case has a hole that corresponds with a hole in the crankshaft. Use an alignment pin to find TC. The camshaft gear has a timing hole that corresponds with a timing hole in the timing case. The timing holes ensure that the camshaft and the crankshaft are in time with each other.
The crankshaft gear rotates the idler gear. The idler gear rotates the camshaft gear and the fuel injection pump gear. The idler gear for the engine oil pump is rotated by the crankshaft gear. This idler rotates the engine oil pump.
The fuel injection pump is a gear-driven pump that is mounted to the back of the front housing. The fuel transfer pump is electrically operated. The fuel transfer pump has an integral fuel filter. The fuel transfer pump is usually located on the left hand side of the cylinder block. Some applications may require the fuel transfer pump to be relocated.
The engine oil pump is a gerotor. The oil pump is driven by an idler gear. The engine oil pump sends lubricating oil to the main oil gallery. The oil relief valve is internal to the oil pump.
Coolant from the bottom of the radiator passes through the centrifugal water pump. The pump is rotated by a gear. The gear of the pump is rotated by the gear from the fuel injection pump.
Lifting the Generator Set
For more information on how to lift the generator set, refer to Operation and Maintenance Manual, "Product Lifting".
Marine Generator Set Model Views
Sea Water Cooled
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| Illustration 1 | g02319954 |
Typical example (1) Expansion tank (2) Filler for engine coolant (3) Aftercooler (4) Air cleaner (5) Indicator for the air cleaner (6) Rain cap for air cleaner (7) MCS control panel (8) Generator terminal box (9) Crankcase breather (10) Duplex fuel filters (11) Fuel priming pump (12) Duplex oil filters (13) Water inlet for auxiliary water pump | |
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| Illustration 2 | g02163145 |
Typical example (14) Engine alternator (15) Exhaust manifold (16) Aftercooler | |
A Keel Cooled System
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| Illustration 3 | g02319956 |
Typical example (1) Cover for belts (2) Top oil filler cap (3) Aftercooler (4) Air cleaner (5) Indicator for the air cleaner (6) Rain cap for air cleaner (7) MCS control panel (8) Generator terminal box (9) Crankcase breather (10) Duplex fuel filters (11) Fuel priming pump (12) Duplex oil filters (13) Water pump | |
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| Illustration 4 | g02163146 |
Typical example (14) Engine alternator (15) Exhaust manifold (16) Aftercooler (17) Electric starting motor | |
Radiator Cooled System
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| Illustration 5 | g02168837 |
Typical example (1) Water temperature regulator (2) Low coolant level alarm (3) Filler cap for radiator (4) Air to air aftercooler (5) Tube from aftercooler to the inlet manifold | |
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| Illustration 6 | g02168874 |
Typical example (6) Tube from turbocharger to the aftercooler | |