First, poor radiator maintenance is a common issue. During the operation of the harvester, blockages often occur in the lower air passage of the radiator, making regular cleaning and maintenance essential. However, in some areas, there may be a lack of necessary tools like air compressors or water guns, and operators tend to overlook this critical task. Over time, these blockages can worsen, leading to reduced cooling efficiency and even engine overheating.
To address this, it's important to clear any obstructions in the air channels between the heat sinks as soon as possible. Normally, compressed air can be used for this purpose. If the blockage is stubborn, a water gun combined with a thin wire can help. However, the radiator must be completely dry before being put back into use to avoid damage from moisture.
Second, overloading the machine can lead to serious problems. Prolonged operation under heavy load increases power consumption, which may cause the engine speed to drop, the fan speed to decrease, and the airflow to become insufficient. This can result in engine overheating and potential mechanical failure.
To prevent this, operators should try to work in dry fields whenever possible. They should also adjust the harvester’s forward gear, cutting width, and height based on crop conditions such as yield, height, and maturity. Avoiding long periods of continuous heavy workload will significantly reduce the risk of overheating.
Third, failing to cover the water tank properly is another common mistake. Many operators leave the tank open, thinking it makes it easier to add water when temperatures rise. Unfortunately, this allows crop debris and dust to enter the tank, mixing with the cooling water and eventually settling on the engine components. This can severely impair heat dissipation and, in severe cases, cause the cooling core to clog, leading to overheating.
A proper solution is to use a multi-layer gauze to cover the open water tank when needed, securing it with wire to prevent leaves and dust from entering. This not only helps maintain clean cooling water but also saves time during refilling.
Fourth, improper cooling water management can also cause issues. Some operators simply wet the radiator with water or even spill excess coolant onto it, thinking it helps with cooling. However, this practice can cause dust to stick more easily to the heat sink, leading to blockages and reduced heat dissipation.
The correct approach is to add cooling water carefully without wetting the radiator itself. Operators should be trained to avoid splashing water on the radiator and ensure that the cooling system is maintained properly. Correcting this habit can greatly improve the efficiency and longevity of the machine.
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