Volvo Penta D7A T Operator's Manual page 51

Cooling system D7A T HE
The system includes two circuits. The freshwater system is cooling the cylinder liners and the cylinder heads. An
engine driven cooling water pump circulate the coolant through the heat exchanger and through the engine. The
rawwater system is cooling the coolant in the freshwater cooling system. The rawwater system is connected to a
seawater inlet or a central cooling system.
Drain points freshwater system
Drain points rawwater system
Maintenance: Cooling system general
1. Engine
2. Freshwater pump
3. Thermostat valve
4. Expansion tank
5. Heat exchanger
6. Rawwater pump
7. Freshwater circuit
8. Rawwater circuit
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