Wear or corrosion deformation of cooling fan is a common phenomenon. Once this phenomenon occurs, the cooling fan cannot reach the maximum cooling air volume, which will lead to insufficient cooling of the cooling system of the excavator.
Improper belt tightness of engine-driven cooling fan and failure of coolant circulating pump are also common reasons.
2. The maintenance of the cooling system of the excavator can't keep up.
The working environment of excavator is harsh and generally dusty, which easily leads to the surface of excavator radiator covered with dust and sediment, blocking the heat dissipation channel. If it is not cleaned in time, it will cause the problem of insufficient heat dissipation capacity of the excavator.
3. Insufficient coolant
Insufficient coolant will also reduce the cooling capacity of the cooling system.
4. Unreasonable coolant was used
It is common that many excavators use water instead of coolant in order to save costs. After long-term use, a lot of scale will be produced, and the pipeline will be corroded to produce impurities and iron filings. , will block the radiator, resulting in insufficient heat dissipation capacity.
5. The cooling structure of the excavator cooling system is unreasonable.
Extended data:
Six skills to solve the high water temperature of excavators:
1. In order to save money, some owners directly use water as coolant for water tanks. These water tanks will scale after being used for a period of time, which will affect the cooling capacity of the whole cooling system and thus produce high temperature. Therefore, cleaning the scale in the water tank can cool the equipment.
Chemical methods are mainly used to remove the scale in the water tank, that is, through the interaction between acidic or alkaline substances, the scale is converted into water-soluble substances and removed. When choosing acidic or alkaline solution, we should consider the nature of scale, scale removal effect and whether it has corrosive effect on cleaning parts. In order to avoid the generation of scale, it is recommended to use professional coolant.
2. Clean the hydraulic oil radiator, filter screen, water radiator blades and filter screen, and blow off the sundries on the radiator of the water tank with high-pressure water or compressed air.
3. When replacing the coolant, park the machine in a flat place, open the radiator cover after the engine cools down, then unscrew the drain valve at the bottom of the radiator assembly to drain the original coolant, then clean the water tank with water, close the drain valve, and then fill with new coolant.
4. In addition, you can install a watering can. The electric water supply system needs a manual button. If you install a car sprinkler system, it's easy to do it yourself. If the water temperature is high, it will drop in a few minutes. The water tank can be installed in an inconspicuous place. It is both beautiful and practical.
5. Pay more attention to cleaning at ordinary times. After the high temperature alarm, check whether the filter screen outside the water tank is blocked. If it is blocked, clean it up and rinse it with a water gun. Remind you later, don't add water when the water quality in the working environment is not good, try to add antifreeze to avoid the high temperature of the excavator.
6, frequently replace the air filter, air conditioning filter, and radiator water tank, and frequently blow with an air hammer, it will not be hot.
Three emergency measures after high water temperature of excavator;
1. Open the hood. Although it is not a good idea, it is very effective in an emergency. )
2. Now, the water tank is washed. To remove it, first separate the top of the water tank, and then insert the steel bar into the water tank. Now clean the water channel with a high-pressure water gun, and then clean the radiator of the water tank.
3. After adding antifreeze, it is better than water, and it is not easy to have scale.