Many excavator drivers often encounter a problem that the excavator cannot start. If it is unable to start for a long time, especially in winter, then congratulations, you may have a short holiday, because this is caused by the engine itself. It may be a valve leak or a piston ring gap that is too large. The compression temperature is not enough, or other reasons, in short, it cannot be solved by the excavator driver. And it is not recommended to use engine starting spray in this situation. Although it is effective, it can make the engine addictive like a drug.
If it is a temporary inability to start, for example, it was fine yesterday, but it cannot start today, or it cannot start as soon as it is stopped. In this case, we can check the cause of the problem. In fact, the idea is very simple. This kind of temporary engine failure to start is caused by two reasons. First, the power is not turned on, and second, the oil is not supplied.
When investigating the reasons, you should consider the following aspects:
1. Start the motor. If there is no sound, it means there is no power. It is recommended to check whether the battery pile head is in poor contact or burned out. If you are driving a model such as Komatsu PC56 or Kobelco SK75, it is recommended that you first confirm that the hydraulic main switch is raised and locked, because there are many models that cannot be started when the hydraulic main switch is not turned on. , a very user-friendly design, but some people who are new to it may not be able to adapt to it for a while.
2. The starter motor is running, but the speed is slow and the sound is weak, which means the battery power is insufficient. It is recommended to check whether the generator belt is normal. It is best to measure the power generation. If it is normal, usually you can only Call the excavator boss and tell him two pieces of news, one bad news and one good news. The bad news is that the boss needs to spend money to replace the new battery. The good news is that you can usually save some money by replacing the old battery with a new one. .
3. Start the motor, the speed is normal, and the sound is normal, but the engine just cannot start, indicating that the oil has not arrived. It is recommended that you clean the diesel pipeline to see if it is blocked. The two points that are easily blocked are: the small hole at the bottom of the diesel tank and the hand oil pump. filter. It is also possible that air got in when changing the filter element. Loosen the exhaust screw and pump oil with a hand oil pump to remove the air. It is worth mentioning that many small excavators use a certain Yanmar engine, which eliminates the hand oil pump and adds a small electronic oil pump to the oil pipe entering the diesel filter element, so we will hear the engine after turning on the power. There is a clicking sound everywhere. This small electronic pump and the high-pressure electronic oil pump of the EFI are two completely different concepts. The role of this small electronic pump is to increase the flow of diesel in the oil pipe. But once this pump appears Problems may also cause the engine to fail to start, or stall immediately after starting. Excavator drivers sometimes encounter the opposite problem, that is, the engine cannot be turned off even after the key is pulled out. This situation is usually caused by the flameout cable not being pulled. Open the engine cover yourself and push the cable head into place. It can stall, but the problem of flameout cable will also cause it to fail to start.
4. It is easy to start a cold car, but it is difficult to start a hot car. Different from the usual understanding, the symptoms of this situation are that it is easy to start in the morning or when the temperature is low. After the water temperature of the machine rises to a certain temperature, it will be turned off and started again. , it cannot be started, and it must wait until the machine cools down before it can be started again. This situation is common in old machines. It is generally believed to be caused by the wear and tear of the diesel pump caused by poor diesel oil quality. The oil pump needs to be calibrated. Calibrating the oil pump is a professional technical job, and the professionals and stores who calibrate the oil pump are known as ” “Henan School Oil Pump” is the most popular. According to legend, there used to be an oil pump factory in Henan. Later, the oil pump factory closed down. The masters in the factory opened their own school oil pump stores. Later, relatives and neighbors also followed suit, so now “Henan School Oil Pump” ” stores are everywhere. I think they are probably the only people in China who don’t want the quality of domestic diesel oil to improve!
If you have also encountered such a situation, I hope this article will be of some help to you. If you need to buy a second-hand excavator or excavator accessories, you can contact us or click on the link directly to browse related products.
Post time: Apr-07-2024