CLIP 0676928 - Caterpillar

The Caterpillar C4.4 (Mech) marine generator sets are available in the following types of aspiration:
Naturally aspirated
Turbocharged
Turbocharged aftercooledEngine Specifications
Note: The front end of the engine is opposite the flywheel end of the engine. The left and the right sides of the engine are determined from the flywheel end. The number 1 cylinder is the front cylinder.
Illustration 1 g00984281
A typical example of the layout of the valves
(A) Inlet valves
(B) Exhaust valves
Table 1
C4.4 (Mech) Marine Generator Set Specifications
Number of Cylinders 4 In-Line
Bore 105 mm (4.134 inch)
Stroke 127 mm (5.0 inch)
Aspiration Naturally aspirated
Turbocharged
Turbocharged aftercooled
Compression Ratio NA 19.3:1
T, TA 18.2:1
Displacement 4.4 L (268 in 3)
Firing Order 1 3 4 2
Rotation (flywheel end) Counterclockwise
Valve Lash Setting (Inlet) 0.20 mm (0.008 inch)
Valve Lash Setting (Exhaust) 0.45 mm (0.018 inch) Engine Cooling and Lubrication
The cooling system consists of the following components:
Gear-driven centrifugal water pump
Water temperature regulator which regulates the engine coolant temperature
Auxiliary water pump
Sea water cooled
Keel cooled system
Radiator cooled
Gear-driven oil pump (gear type)
Oil coolerThe engine lubricating oil is supplied by a gear type pump. The engine lubricating oil is cooled and the engine lubricating oil is filtered. Bypass valves provide unrestricted flow of lubrication oil to the engine parts when oil viscosity is high. Bypass valves can also provide unrestricted flow of lubrication oil to the engine parts if the oil cooler should become plugged or if the oil filter element should become plugged.Engine efficiency, efficiency of emission controls, and engine performance depend on adherence to proper operation and maintenance recommendations. Engine performance and efficiency also depend on the use of recommended fuels, lubrication oils, and coolants. Refer to the Operation and Maintenance Manual, "Maintenance Interval Schedule" for more information on maintenance items.Engine Service Life
Engine efficiency and maximum utilization of engine performance depend on the adherence to proper operation and maintenance recommendations. In addition, use recommended fuels, coolants, and lubricants. Use the Operation and Maintenance Manual as a guide for required engine maintenance.Expected engine life is predicted by the average power that is demanded. The average power that is demanded is based on fuel consumption of the engine over a time period. Reduced hours of operation at the full throttle and/or operating at reduced throttle settings result in a lower average power demand. Reduced hours of operation will increase the length of operating time before an engine overhaul is required.