SHAFT 8D2469 - Caterpillar

Cooling Systems
Radiator Or Heat Exchanger
COOLING SYSTEM SCHEMATIC
1 - Aftercooler. 2 - Water temperature regulator housing. 3-Radiator. 4-Cylinder head. 5-Diesel engine cylinder block. 6-Diesel engine water pump. 7-Oil cooler.Coolant is circulated by a gear driven, centrifugal-type water pump. Temperature regulators located at the front of the cylinder head, restrict coolant flow through the radiator or heat exchanger, until the coolant reaches operating temperature.The water pump has two outlets. One outlet directs coolant to the aftercooler. The other outlet directs coolant to the engine oil cooler. Both streams join and are directed to the area around the cylinder liners, into the cylinder head, and then to the water temperature regulator housing.Until the coolant reaches the temperature required to open the temperature regulators, coolant bypasses the radiator or heat exchanger and flows directly back to the water pump.A pressure relief cap assembly is used to control the pressure in the cooling system. The cap allows pressure (and some water if the cooling system is too full) to escape when system pressure exceeds the relief pressure of the cap.Raw Water Aftercooled With Expansion Tank And Heat Exchanger
Jacket water is circulated by a gear-driven, centrifugal-type water pump. Water temperature regulators located at the front of the engine, bypass coolant back to the water pump until the coolant reaches operating temperature.Coolant from the diesel engine water pump is directed through a passage in the flywheel housing to the diesel engine oil cooler. From the diesel engine oil cooler, coolant is directed through the marine gear oil cooler into the cylinder block, around the cylinder liners, and into the cylinder head to cool the area around the precombustion chambers and cylinder head valves. Coolant is then directed to the water temperature regulator housing.
COOLING SYSTEM SCHEMATIC
1-Aftercooler. 2-Cylinder head. 3-Water temperature regulator housing. 4-Expansion tank. 5-Raw water pump. 6-Heat exchanger. 7-Diesel engine oil cooler. 8-Marine gear oil cooler. 9-Diesel engine water pump. 10-Turbocharger heat shield. 11 - Exhaust manifold heat shield. 12 - Diesel engine cylinder block.Coolant is also directed to the turbocharger and exhaust manifold heat shields. The coolant then flows to the water temperature regulator housing where it joins with coolant from the cylinder head. Until the coolant reaches normal operating temperature, it is bypassed back to the water pump.Raw water is circulated by a gear-driven, centrifugal-type water pump. Coolant is directed to the aftercooler, to the heat exchanger and then to waste.A pressure relief cap assembly is used to control the pressure in the cooling system. The cap allows pressure (and some water if the cooling system is too full) to escape when system pressure exceeds the relief pressure of the cap.Keel Cooled (Marine)
Coolant is circulated by a gear-driven centrifugal type water pump. Temperature regulators located at the front of the engine, bypass coolant flow back to the water pump until the coolant reaches normal operating temperature.Coolant flow is divided at the water pump. A portion of the coolant is directed to the aftercooler, and then flows into the cylinder block. The remainder of