Cooling system is in charge of reducing the temperature of the engine and other systems such as the braking or hydraulic system, it is also responsible for maintaining the engine at an adequate working temperature, for this purpose coolant is used.

Air was used in older engines, but these engines are no longer very common in modern industry.

These are some of the subsections of the cooling system;

  • Coolers and intercoolers
  • Water pumps
  • Tensioners and belts
  • Indicators and sensors
  • Expansion tanks
  • Organic and inorganic refrigerants
  • Miscellaneous (Hoses, plugs, gaskets, fan motors, etc…)

 

Cooling system operation

When the engine is cold, the components wear out easily, it pollutes more and is less efficient, an overheating of the engine would cause major breakdowns, that is why the main function of the cooling system is to allow the engine to warm up as soon as possible and then to work at a constant temperature.

Here below, we detail some sections of the system and its functions:

 

RADIATOR

Made up of many small-diameter finned tubes, it acts as a heat exchanger between the hot water from the engine and the ambient air blown by the fan.

 

COOLER

It acts as a radiator, it cools the oil to achieve a suitable temperature and viscosity, ensuring good lubrication of the parts.

 

INTERCOOLER

Main in turbocharged engines, it reduces the temperature of the air in the intake, thus avoiding drops in engine performance.

 

THERMOSTAT

It acts as a valve for the coolant, it is in charge of opening and closing its passage to the radiator, thus allowing an optimal and constant operating temperature.

 

 

WATER PUMP

Its function is to maintain a constant flow of refrigerant within the circuit, it is one of the main components that cause leaks and major breakdowns in the cooling system.

 

FAN

Ensures forced air circulation through the engine radiator, in public works machinery there are different types depending on their drive:

 

  • BELT DRIVEN FAN

this type of fan is always running regardless of coolant temperature and its speed depends on engine speed

 

  • FAN WITH CLUTCH

The engine control unit manages the speed of the fan, engaging and disengaging the clutch according to the signal from the various engine temperature sensors.

 

  • FAN DRIVEN BY HYDRAULIC MOTOR

This fan varies its speed according to the temperature of the coolant and other systems, it is the most precise and efficient of all those mentioned above.

 

EXPANSION TANKS

It absorbs variations in the volume of the refrigerant due to changes in temperature and maintains the system pressure within pre-established limits.

 

TENSIONERS AND BELTS

The main functions of belt tensioners are to maintain proper tension, dampen system vibrations, and guide the drive belt. At Blumaq we have ribbed, trapezoidal or toothed belts, and tensioners with the exact design, measurements and specifications of the OEM manufacturer.

 

REFRIGERANTS

The coolant is a compound of deionized water, additives and ethylene glycol, the latter has the ability to regulate the temperature, depending on the place where you work you must take into account the temperature ranges of the coolant to be used, which range from -40ºC to 140ºC, there are 2 types of coolants:

 

  • ORGANIC

It does not use silicates and is therefore more durable, since this compound causes it to degrade earlier, instead it uses protection additives that also reach a higher freezing temperature.

 

  • INORGANIC

They last less than organic due to the use of silicates and are more harmful to the environment.

It is important that the cooling system only uses liquid coolant, otherwise the useful life of the engine components will be shortened and we could have the following problems:

  • Cavitation in the system.
  • Corrosion of cooling system components.
  • Increased system temperature.
  • Shorter useful life of the diesel engine.

 

TEMPERATURE INDICATORS

Recognition of these symbols by the operator allows the maintenance team to take action before these failures become major repairs. In this way we warn that they are informative indicators that give us information on the state of the refrigeration system, indicating through visual or sound alerts, its malfunction.

Blumaq has the most complete line of products for maintenance and repair of the cooling system of your machine, Our products are manufactured under the strictest quality controls, adjusted to the specifications of the OEM manufacturer.