Cooling System - Belarus 3522.5 Operator's Manual

3.1.4 Cooling system

The system of engine cooling is a liquid closed-type, with forced coolant circulation
and a deaerating-compensation circuit. It includes a cooling jacket, a water pump, a radia-
tor with in-built deaeration system, a fan with an automatically controlled viscous clutch, an
expansion tank, connection hoses, clamps, drain plugs, a plug of the expansion tank with
a steam and air valves. The engine thermal mode is controlled by a thermostat and the
viscous clutch of the fan 9. The cooling system radiator is a ribbed tube type.
Coolant temperature is controlled on the coolant temperature indicator and a pilot
lamp of the engine coolant emergency temperature on dashboard. A normal temperature
mode of the engine corresponds to the coolant temperature from 85 to 99° C. The pilot
lamp of the engine coolant emergency temperature goes off when the temperature is
109°C and higher. Information on the parameters mentioned is transmitted to master in-
struments via CAN cable from the electronic unit of engine control, that handles signals
from sensors.
Elements of the engine cooling system are presented in figure 3.1.4.
1 – expansion tank; 2 – deaeration hoses; 3 – feeding hose; 4 – pipe from water
pump to water radiator; 5 – tension elements; 6 – water radiator housing; 7 – seals; 8 –
water radiator; 9 – fan with viscous clutch; 10 – pipe from water radiator to engine; 11 –
rubber shock absorber; 12 – drain plug; 13 – plug of extension tank; 14 – coolant level
sensor.
Figure 3.1.4 – Engine cooling system
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