BUSHING 3792769 - Caterpillar

Keel Cooling System
Naturally Aspirated 3054B Marine Engine and Turbocharged 3054 Marine Engine
Illustration 3 g00786736
Typical connections for the keel cooling system for the naturally aspirated 3054B and the turbocharged 3054 Marine enginesThe arrows indicate the direction of flow. (1) The diameter for the outlet for the keel cooling system is 45.0 mm (1.75 inch). (2) The diameter for the inlet for the keel cooling system is 45.0 mm (1.75 inch). (3) Jacket water pumpBoth the naturally aspirated 3054B Marine engine and the turbocharged 3054 Marine engine are suitable for a keel cooling system.
Table 1
Requirements for Keel Cooling Systems for the Naturally Aspirated 3054B Marine Engine and Turbocharged 3054 Marine Engine    
Circuit for the Engine Coolant    
Heat rejection    
60 kW (3400 Btu/min) for the 3054 naturally aspirated engine
74 kW (4200 Btu/min) for the 3054 turbocharged engine    
Coolant temperature at the exit of the keel cooler    
60 °C (140 °F)    
Coolant flow through the keel cooler    
45 to 70 L/min (12 to 19 US gpm)    
Piping     Refer to Illustration 3.    The length of the piping between the engine and the keel cooler must be as short as possible. To achieve a short distance, the piping must be as direct as possible. The piping must also be flexible so that the engine is allowed to move on the flexible engine mounts. Venting points should be installed so that air can be removed from the system.The keel cooling system should use the correct mixture of water and antifreeze. Refer to the Operation and Maintenance Manual, "Cooling