VALVE GROUP 2U3013 - Caterpillar

Jacket Water Circuit
3054 Marine Generator Set Engine
Illustration 1 g00839148
Typical jacket water circuit for the 3054 Marine Generator Set engine The solid arrows indicate the direction of flow. (1) Expansion tank (2) Vent lines (3) Water cooled exhaust manifold (4) Water temperature regulator (thermostat) (5) Cylinder head (6) Vent lines (7) Engine oil cooler (8) Bypass line (9) Jacket water pump (10) Cylinder block (11) Bypass line (12) Heat exchangerCoolant is pulled from the heat exchanger (12) into the jacket water pump (9) by impeller action. The jacket water pump is located on the front left side of the engine. The jacket water pump is gear-driven.The coolant is pumped through the cylinder block (10). The coolant is distributed around each cylinder. At each cylinder, coolant enters the cylinder head (5). The coolant then enters the water outlet manifold. The coolant then enters the water cooled exhaust manifold (3). The coolant then flows to the water temperature regulator (4). With the water temperature regulator in the closed position, the coolant bypasses the heat exchanger (12) and flows back to the jacket water pump (9) for recirculation. With the water temperature regulator in the open position, the coolant is directed through the heat exchanger (12) and back to the water pump inlet. 3056 Marine Generator Set Engine
Illustration 2 g00839508
Typical jacket water circuit for the 3056 Marine Generator Set engineThe solid arrows indicate the direction of flow. The dashed arrows indicate the direction of flow in piping for the expansion of the coolant in the vent passage. The dashed arrows indicate bypass lines or vent lines. (13) Exhaust manifold (14) Cylinder head (15) Cylinder block (16) Vent lines (17) Expansion tank (18) Bypass for the water temperature regulator (19) Water temperature regulator (thermostat) (20) Jacket water pump (21) Heat exchangerCoolant is pulled from the heat exchanger (21) into the jacket water pump (20) by impeller action. The jacket water pump is located on the front left side of the engine. The jacket water pump is gear-driven.The coolant is pumped through the cylinder block (15). The coolant is distributed around each cylinder. At each cylinder, coolant enters the cylinder head (14). The coolant then enters the water outlet manifold. The coolant then enters the exhaust manifold (13). The coolant then flows to the water temperature regulator (19). With the water temperature regulator in the closed position, the coolant flows through the water temperature regulator. The coolant bypasses the heat exchanger (21) and flows back to the jacket water pump for recirculation. With the water temperature regulator in the open position, the coolant is directed through the heat exchanger (21) and back to the water pump inlet.Sea Water Circuit
Two types of external cooling systems can be used on the 3054 Marine Generator Set engine and the 3056 Marine Generator Set engine. The sea water circuit and a keel cooling system are two types of external cooling systems. Both systems are separate from the jacket water circuit. The sea water circuit is necessary in order to cool