DCE80-100E
Technical Handbook
Engine TAD720VE
Description
22
P.Group 30
TDCE01
04GB
Cooling system
The engine is liquid-cooled and equipped with a closed cooling
system consisting of the following main components:
z Coolant pump
z Radiator with integrated intercooler and gearbox oil cooler
z Expansion tank
z Thermostat
z Radiator fan
z Coolant passages
z Engine oil cooler
The coolant flows through a longitudinal passage into the engine
block. The opening into the cooling jacket of each cylinder is in-
dividually sized to ensure that each cylinder will be supplied with
the same rate of coolant flow.
The coolant flows in the separate return lines converge into a
common pipe in the thermostat housing. The coolant then flows
to the coolant pump and then into the engine and to the oil cooler.
When the engine has reached its normal operating temperature,
the thermostat will open the circuit to the radiator.
The piston-type thermostat is capable of passing a high coolant
flow rate at a minimum of pressure drop, thus contributing to fa-
vourable coolant circulation in the engine.
.
1. Coolant connection, inlet
2. Thermostat housing
3. Coolant pump
4. Oil cooler
5. Cylinder cooling
6. Cylinder head cooling
7. Coolant connection, outlet
1
2
3
1. Charge air cooler
air-to-air
2. Radiator,
air-coolant
3. Oil cooler gearbox,
air-oil
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