DCE80-100E
Technical Handbook
Engine TWD731VE
Description
5
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
z Expansion tank
z Thermostat
z Radiator fan
z Coolant passages
z Engine oil cooler
z Gearbox 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.
The coolant pump is fitted on the transmission cover and is driven
by a gear wheel from the transmission wheel.
The intercooler is connected to the cooling system by a pipe from
the coolant pump. The outlet from the intercooler is connected to
the oil cooler.
1. Filler cap
2. Pipe thermostat housing- upper expansion tank
3. Piston thermostat
4. Distribution channel
5. Cylinder head
6. Oil cooler
7. Cylinder lining
8. Coolant pump
9. Pipe to the suction side of the pump
10. Radiator
11. Intercooler
To Next Page
Loading...
