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, and regular cleaning is essential. However, in some areas, there may be no access to an air compressor or water gun, leading operators to overlook this critical task. Over time, these blockages can worsen, reducing the radiator's cooling efficiency and even causing it to lose its ability to dissipate heat completely.
To address this, it's important to remove any blockages in the air channels between the heat sinks promptly. Normally, compressed air can be used for this purpose. If the blockage is stubborn, a water gun combined with a thin wire can help clear it. However, the radiator must be completely dry before being put back into service to avoid damage.
Second, overloading the machine can lead to serious problems. When the harvester runs for extended periods without proper adjustments, it consumes too much power, which can cause the engine speed and fan speed to drop. This results in insufficient airflow, leading to overheating of the engine.
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 the crop's yield, height, and maturity. Avoiding long-term overload operations is crucial for maintaining optimal performance and preventing overheating.
Third, failing to cover the cooling core plug when the water tank is open is another common mistake. Many operators leave the tank uncovered so they can quickly add water when the temperature rises. However, this allows crop debris and dust to enter the tank, mixing with the cooling water and gradually settling on the engine body and cylinder head. This can severely reduce heat dissipation and, in extreme cases, cause the cooling core to become blocked, leading to engine overheating.
The solution is to use a multi-layer gauze to cover the water tank when it's open. Secure it with a piece of wire to prevent leaves and dust from entering. This helps maintain the quality of the cooling water and ensures efficient heat dissipation.
Fourth, improper cooling water management is another issue. Some operators add water only to wet the radiator or, worse, spill excess water onto it. This can cause dust to stick to the heat sink, creating blockages and reducing cooling efficiency.
To fix this, operators should avoid getting the radiator wet when adding cooling water. Water should not be splashed directly onto the radiator. It's important to correct this incorrect practice to ensure the radiator functions properly and maintains optimal cooling performance.
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