During the use of the excavator, high temperature problems may occur from time to time, causing trouble for engineering operations. When the excavator has a high temperature phenomenon, we can solve it from multiple aspects.
First, check the cooling system. The coolant level is a key factor. Insufficient coolant can easily cause high temperature in the excavator. Open the radiator cap and check whether the coolant level is within the specified range. If the level is too low, add coolant in time after the engine cools down. For second-hand dealers, when purchasing a second-hand excavator, be sure to check whether the coolant level is normal. If the level is too low, it may mean that the excavator has problems such as cooling system leakage, which requires further careful inspection and repair. When selling second-hand excavators, customers should be explained in detail how to check and add coolant, as well as the importance of regularly checking the coolant level.
The condition of the radiator should not be ignored. Radiator blockage will affect the heat dissipation effect of the coolant, causing the engine temperature to rise. Check whether there are debris, dust and other blockages on the surface of the radiator. If there are, they should be cleaned in time. You can use a high-pressure water gun or compressed air to clean it, but be careful not to use too much pressure to avoid damaging the radiator. At the same time, check whether the radiator fins are deformed or damaged. If there is a problem, the radiator should be replaced in time. When checking the radiator of a second-hand excavator, second-hand dealers should pay attention to the appearance and heat dissipation effect of the radiator. If there is obvious corrosion or damage on the surface of the radiator, it may affect the heat dissipation performance and need to be repaired or replaced. And you can introduce the maintenance methods of the radiator to customers, such as regular cleaning of the radiator, avoiding long-term operation in a high temperature environment, etc.
The normal operation of the fan plays an important role in the heat dissipation of the excavator. Fan failure can cause high temperature in the excavator. Check whether the fan is operating normally and whether the fan belt is loose or broken. If the fan does not turn or the speed is too low, check whether the fan motor, fan relay and other components are normal. If the fan belt is loose or broken, it should be adjusted or replaced in time. For some large excavators, they may be equipped with hydraulically driven fans. At this time, check whether the hydraulic system is normal and whether the hydraulic oil temperature is too high. If the hydraulic system fails, it will also affect the operation of the fan and cause the engine to be overheated. When checking the fan of a second-hand excavator, second-hand dealers should pay attention to whether the sound of the fan is normal. If there is abnormal noise, it may mean that the fan bearing is damaged or the fan blades are deformed, and they need to be repaired or replaced. At the same time, you can also introduce the maintenance methods of the fan to customers, such as regularly checking the tightness of the fan belt and keeping the fan clean.
In addition, the engine needs to be checked. Insufficient engine oil or poor oil quality will affect the lubrication effect of the engine and cause the engine temperature to rise. Check whether the engine oil level is within the specified range. If the level is too low, add oil in time. At the same time, check whether the quality of the oil meets the requirements. If the oil becomes black, thick or has a peculiar smell, the oil should be replaced in time. When checking the engine oil of a used excavator, second-hand dealers should observe the color and viscosity of the oil. If the oil color becomes black or the viscosity becomes larger, it may mean that there is wear or other problems with the engine, which requires further inspection and repair. When selling second-hand excavators, customers should be informed of the methods for checking and replacing the oil, as well as the importance of changing the oil regularly.
It is also important to check the engine thermostat. A thermostat failure will affect the circulation of the coolant and cause the engine temperature to rise. The thermostat can be placed in hot water to observe whether the opening temperature of the thermostat meets the requirements. If the thermostat cannot be opened or closed normally, the thermostat should be replaced in time.
In short, when the excavator has a high temperature problem, we can find the problem by checking the cooling system and engine, and take corresponding measures to solve it. Second-hand dealers also play an important role in this process. By conducting detailed inspections and maintenance suggestions on excavators during the acquisition and sales process, they can provide customers with more reliable second-hand excavators, and also provide guarantees for the normal use of excavators and the smooth progress of engineering operations.