In winter, excavators often face difficulty in starting, and there are many reasons behind this. First of all, low temperature is undoubtedly a key factor causing difficulty in starting. When the temperature drops sharply in winter, the fluidity of engine oil, coolant and other liquids will be greatly reduced. The engine oil becomes viscous, making it difficult to quickly reach various lubricating parts in the early stages of engine startup, which greatly increases the friction resistance inside the engine. At this time, the starter motor requires greater torque to drive the engine, and the difficulty can be imagined. At the same time, the fluidity of the coolant becomes worse, the engine warm-up time becomes longer, and starting is naturally more difficult. For used excavators purchased from second-hand dealers, the quality of the oil and coolant may vary due to unclear previous maintenance. Second-hand dealers may check and replace these fluids when selling second-hand excavators, but they cannot fully guarantee their performance in winter.
Secondly, the battery performance decline is particularly obvious in winter. In low temperature environments, the capacity of the battery will be significantly reduced, and the output current will also be reduced. The starter motor does not receive enough electrical support to produce enough torque to start the engine. Moreover, low temperature will also cause the chemical reactions inside the battery to slow down, further affecting its performance. Second-hand dealers may perform a certain degree of testing on the battery when selling a second-hand excavator, but there is no guarantee that it will work stably throughout the winter. Users who purchase second-hand excavators need to pay special attention to the status of the battery when using it in winter, and replace it in time if necessary.
Furthermore, the fuel issue cannot be ignored. When the temperature is low in winter, the volatility of fuel becomes poor and the atomization effect is not good. This makes it difficult for the fuel to be fully burned in the engine, making it difficult to start the engine. In addition, if poor quality fuel is used, or if the fuel contains moisture, wax formation and other phenomena are more likely to occur at low temperatures in winter, blocking the fuel pipeline, affecting the supply of fuel, and further aggravating the problem of difficulty in starting. Second-hand dealers may perform some inspections and cleaning of the fuel system when selling used excavators, but they cannot completely eliminate the risk of fuel problems.
In addition, if the engine's preheating system fails, it will also cause difficulty in starting. Some excavators are equipped with preheating devices such as glow plugs, which can preheat the engine before starting in winter, increase the temperature of the engine, and improve the atomization effect of fuel, thereby reducing the difficulty of starting. If the preheating system fails and fails to work properly, it will become more difficult to start the engine at low temperatures. Second-hand dealers may inspect and repair the preheating system when selling second-hand excavators, but cannot guarantee its long-term stable operation.
For second-hand dealers, when they sell second-hand excavators, they should introduce to users in more detail the difficulties in starting the equipment that may occur in winter and provide some suggestions for countermeasures. At the same time, second-hand dealers can also conduct more comprehensive inspections and maintenance on second-hand excavators before sale to ensure that the equipment can start as smoothly as possible in winter.
In short, the difficulty in starting an excavator in winter is the result of a combination of factors. Whether it is a new excavator or a second-hand excavator purchased from a second-hand dealer, users need to do a good job in the care and maintenance of the equipment before winter comes, such as changing the engine oil suitable for winter use, checking the performance of the battery, and ensuring the quality of the fuel. , Check the preheating system, etc. For users of second-hand excavators, it is more important to strengthen the inspection and maintenance of the equipment, and at the same time maintain good communication with second-hand dealers to jointly deal with the problem of difficult starting in winter.