High water temperature hazards
When the water temperature is high, the water temperature signal will enter the electromechanical control system for data analysis, which will ultimately affect the output of the engine power. When the water temperature is high, due to the protective effect of the engine, the fuel supply of the engine will be reduced and the power will be reduced, which may cause the excavator to slow down after the engine is reduced in power. The heat of the engine cannot be taken away in time. The temperature of the engine oil and the temperature of the exhaust gas will increase. If it is not processed in time, the engine may be damaged.
How to determine the high water temperature
确认 Check whether the water temperature indicator has reached the red line; the normal water temperature is about 90°C, and when the water temperature is high, the alarm will reach about 106°C.
â–Š Check the tank for water.
High water temperature troubleshooting method
æ˜¯å¦ Whether the thermostat is normally open (the temperature of the thermostat is about 78 degrees). The thermostat is removed and placed in water for heating. Observe its opening condition. If the thermostat is damaged, it will cause problems in the engine water circulation process, and it will not be converted to a large cycle for temperature exchange after the small cycle temperature rises.
å˜ Coolant has been used for too long.
å†·å´ Whether the cooling water is genuine antifreeze. The genuine Kobelco coolant contains sulphur-proof components and has anti-corrosion effect. Some friends add directly to pure water, which will cause the boiling point to become lower and the corrosion ability to increase. It will cause serious corrosion to the cylinder wall of the engine. It is recommended to minimize the use. In addition, it should be noted that the cooling water of the auxiliary plants can not be mixed and added, such as mixing will cause the clogging of the water tank, resulting in other water temperature problems and other problems.
气缸 Whether the cylinder head gasket is broken: Open the water cover in case of a cold machine, start the engine for a period of time and observe whether the water tank is turned over. If it is normal, if there are more air bubbles, the cylinder cushion may be damaged. However, if there is no phenomenon, it indicates that the cooling water is not undergoing a large cycle, there may be no opening of the thermostat or a pump failure, and professionals are required to go to the site for further inspection.
â–Š Water tank cooling effect is not good. Make sure that the inside of the tank is clogged or that there is no contamination on the outside. Clean the tank frequently.
â–Š Check if the radiator is clogged. If the radiator is dirty, you can use the air compressor to blow away the dirt. Do not use a high-pressure water gun. Second, check whether the sponge is damaged, causing poor heat dissipation.
â–Š Check the fan belt tension, it may be that the cooling fan belt slips, the belt tension does not meet the requirements, or the cooling blades have a large number of sundries, causing air to inhale poorly.
有 The EGR cooler is damaged.
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