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Machine Translated by Google
MP3 530 hpe
circuit diagram
The cooling system is a pressurized water circuit with a coolant pump and constant ventilation.
Cooling takes place via a centrifugal pump that is driven by the countershaft.
The coolant is routed from the pump to the thermal unit.
The bracket for the 2-way thermostat is attached to the outlet of the cylinder head, one of which
to the pump, the other to the cooler (with horizontal circulation).
The cooler output is connected directly to the pump.
The expansion tank is connected in parallel to the radiator.
The hot radiator housing is connected to the upper part of the expansion tank (air).
The cold radiator housing is connected to the lower part of the expansion tank (liquid).
When the engine is cold, the thermostat output to the radiator is closed, even if a small flow to the
ventilation is ensured through the opening on the closing plate.
In this case, the internal circulation in the thermal unit is activated to ensure a uniform
Ensure warming.
After reaching the operating temperature, the main circulation is at the cooler and at the expansion joint
barrel activated.
When the thermostat opens, there is a flow overlap (recirculation and main flow).
At higher temperatures, circulation via the thermostat is excluded in order to
To promote main circulation.
In this case there is also a considerable flow in the expansion tank, which ensures the constant
Self-venting ensures.
Cooling system
COOL - 259
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