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Forklifts cooling system

Reading time: 4 min 8 sec

Our team knows how frustrating it can get when you're looking for a specific part and end up getting the wrong one. Let's help you to find a suitable forklift cooling system part according to your requirements and specifications.Buy new parts at low prices with quality guaranteed for the Forklift cooling system at lift parts warehouse.

Summary

The following technical information allows the reader to know more about the Forklift cooling system of an internal combustion engine and the functioning of each component. Besides, you will find some tips about the common problems presented in the mentioned system.

Table of content

  1. What is a cooling system?

  2. Cooling system main parts

  3. How a forklift cooling system works

  4. Signs of a forklift cooling system problem

What is a cooling system?

It is the system that dissipates the heat from the engine body by circulating fluid around it. Some forklifts work with internal combustion. The reasons why the engine of these types of trucks needs a cooling system are:

  1. To control its temperature.

  2. To avoid overheating.

  3. To get the engine in good condition.


The cooling systems types are:

  1. Air cooling.

  2. Water cooling.

Most forklifts use a water cooling system.

Cooling system main parts


Figure 1. Cooling system diagram

How a forklift cooling system works

Combustion converts chemical energy into heat-It happens inside a forklift engine. A big part of heat escapes with exhaust gases. The engine body absorbs the heat that remains. So, the machine temperature increases.

The following video explains the functioning of an engine cooling system:

When the engine starts running, the water pump does too. This pump inserts coolant into the passages around the machine (block and cylinder heads). The coolant could be:

  • Water

  • Coolant


The temperature of this fluid goes high while it recirculates around the engine. The thermostat ( figure 2) is a valve that measures the temperature of the recirculating coolant.

Once the coolant reaches a high temperature, the thermostat opens and do two things:

  1. Stop the recirculation of the hot coolant.

  2. Address the coolant to the radiator.


Figure 2. Thermostat used in forklift cooling system


A cold coolant is inserted into the system to continue the engine cooling process when the hot coolant leaves the engine passages. To understand the functioning of the thermostat in forklifts,
click here.
The hot coolant goes through a hose from the engine body to the upper radiator tank. In this section, the hot coolant creates a high-pressure environment that a radiator cap controls. To keep the tank at a suitable pressure, a quantity of hot coolant passes to an overflow tank through the radiator cap, shown in figure 3.

radiator cap
Figure 3. Example of a radiator cap


On the other hand, the fan starts running once the hot coolant arrives at the upper radiator tank. The fan blades running makes more air current pass through the radiator, as is shown in figure 4. To know more about fans in Forklift cooling systems,
click here.

fan blade
Figure 4. Flan blade


The air passing through the radiator takes the heat from the coolant that goes down to the bottom radiator tank. Once the fluid arrives at the bottom, it has a suitable temperature to recirculate again to the engine body.

Forklift oil cooling system

Forklifts also have an oil cooler to ensure the lubricating oil has suitable viscosity. The excellent lubrication of internal parts protects the engine pieces from wear when they continuously move over each other.

An oil cooler works as a smaller radiator to cool the lubricating oil. The oil that comes from the sump tank of the engine with a high temperature circulates through pipes located inside the oil cooler.

oil cooler
Figure 5. Forklift oil cooler


The oil cooler looks like a small radiator (figure 5), with pipes that have fins to make the oil temperature decrease easier. Finally, the oil comes out from this heat exchanger with a suitable temperature to recirculate the engine lubricating system. Depending on the system setting, the cooling of the oil could be performed by circulating air or coolant around oil pipes to decrease the oil temperature. To get more information about this part of the cooling system,
click here.

Signs of a forklift cooling system problem

  1. The temperature of the forklift engine is higher than the usual parameters. This sign is the most common to know that something is wrong with the cooling system. If the forklift engine works well, be sure about the functioning of the forklift thermometer.

  2. Low coolant levels. The cooling system is a closed-circuit system. Thus, a low coolant level means that there is a leakage. The cooling system checking is essential to identify where the leakage is (at some point in their connections or internal). When there is an internal leakage, the system exhausts white smoke. It means the coolant leaks into the combustion chamber, and the smoke comes from the burning of the coolant. In this case, the problem is located in the engine and not in the cooling system.

  3. Smoke coming from the cooling system. Overheating occurs when one of the components of the system does not work correctly. A damaged part and the absence of coolant are the common reasons.

  4. Oil leakage. When the oil cooler works as a heat exchanger between coolant and oil, internal damage of the oil cooler causes these two fluids to mix. In other cases, an oil puddle can be a sign of damage in the oil cooler, especially if leakage intensifies during engine running.

Takeaways

  • The cooling system dissipates the heat from the engine body by circulating fluid around it.

  • The system is composed of a water pump, a radiator, a radiator cap, a radiator hoses, a fan blade, a fan belt, and a thermostat.

  • The oil transmission cooling is performed through an oil cooler.

  • High temperatures, low coolant levels, smoke coming from the cooling system, and oil leakage indicate a problem with the cooling system.

Most of the time, the solution for the failures related to this system is by replacing any parts. Identifying the problem and choosing the correct spare part is essential to ensure the issue is solved.

Lift Parts Warehouse offers a great selection of forklift cooling system parts, all at low prices. Our team understands the different forklifts and their spare parts. We count on quick shipping and delivery service for you to receive your spare promptly.

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