Excavators often have poor engine cooling and high temperature during the construction process, and the precision parts of the engine also have thorny failures such as thermal expansion damage and cylinder pulling. The occurrence of these problems excludes factors such as the wear of precision parts, and another important reason is that the use and maintenance of the cooling system is not done properly!
1. Regularly clean and maintain the cooling system
Cleaning the cooling system is something that many people ignore.The rust and scale in the cooling system will accumulate for a long time and become clogged. Therefore, qualified operators must purchase special cleaning agents for regular cleaning.
The cleaning agent can completely clean the rust, scale and acidic substances in the entire system. The cleaned scale is a powdery suspended matter and will not block small water channels. It can be cleaned during the operation of the machine without delaying the construction period.
2. Check and adjust the tightness of the fan belt
The climate in winter is relatively cold and dry, and the fan belt is prone to brittle or broken, so it should be checked and adjusted regularly.
The tightness of the belt is also directly related to the working condition of the cooling system. If the belt tightness is too small, it will not only affect the cooling air volume, increase the working load of the engine, but also easily slip and accelerate the wear of the belt. If the belt tightness is too large , It will accelerate the wear of water pump bearings and generator bearings. Therefore, check the tightness of the belt during use and adjust it if necessary.
3. Check the working condition of the thermostat in time
If the thermostat fails, it will cause the engine temperature to rise slowly, and the temperature is lower at low speeds, and this situation is particularly prominent in winter.
Generally check whether the thermostat is normal. We can open the water tank when the engine is started. If the cooling water in the water tank is not moving, it indicates that the thermostat is working properly. In addition, if the water temperature is always at the bottom line when driving at high speed, then it indicates The thermostat valve did not open. At this time, another obvious feature is that the upper water chamber of the water tank is hot and the lower water chamber is very cold, and it needs to be checked as soon as possible.
In addition, attention should be paid to cleaning the scale and dirt on the thermostat in time to ensure that the thermostat works well and prevent the engine water temperature from being too low or too high.
4. Replacement and use of antifreeze
1. When choosing antifreeze, the freezing point of the antifreeze should be 5℃ lower than the lowest temperature in the area of use. Therefore, the coolant should be selected strictly according to the local temperature.
2. The antifreeze is relatively easy to leak, and the tightness of the cooling system should be carefully checked before filling. At the same time, due to the large expansion coefficient of the antifreeze, it is generally added to 95% of the total capacity to avoid overflow and loss after the temperature rises.
3.Finally, it is strictly forbidden to mix different grades of coolant to avoid corrosion of aluminum parts and radiators on the engine.
How to replace the coolant
Before starting the engine, look at the transparent compensation tank. The height of the coolant level should be between the upper limit (FULL) and the lower limit LOW in the tank. The liquid level is closer to the upper limit.
Further observation should be made after filling. If the liquid level drops within a short time, it indicates that there may be a leak in the cooling system. The radiator, water pipe, coolant filling port, radiator cover, drain valve and Water pump.
The radiator also needs to replace the coolant
The sealed radiator uses a long-lasting coolant, so it must be replaced after a certain period of time.
If you need any spare parts of excavator, you can contact us or visit our web https://www.cm-sv.com/excavator-parts/
Post time: Nov-23-2021