In addition to mastering the mechanical driving skills, a qualified engineer should also understand some simple maintenance and maintenance of the machine, but not every master or teacher will teach these. Gear oil, do not know how long to need to change? I can't tell which is the oil filter element and which one is the diesel filter element. I don't know how to air the air. Do not know how many hydraulic filter core? If there is a little trouble, it is even more difficult to understand. The picture used in this article is only an example, not an exact picture of the specific location in the article.
Like people will have a fever and cold, machinery also often has some small problems, some people say that the excavator apprenticeship should start learning from the rotten machine, because the small problems will appear more, long medical treatment, and when the driving skill is skilled, the mechanical maintenance is also understood, from this point of view, I am lucky. We have been dealing with the rotten machines for many years, so we have met a lot of failures of the excavators.
Many excavator drivers often encounter a problem that the excavator can not start. If it is a long-term failure, especially in winter, congratulate you, you may have a small holiday, because this is a problem caused by the engine itself, it may be the leakage of gas or the gap between the piston ring too large, the compression temperature is not enough, or other reasons, in short, not the excavator driver can solve the problem. By the way. And it's not recommended to use an engine to start the spray, which works well but can be addictive to the engine like a drug.
If it is a temporary inability to start, such as yesterday is still good, today will not move, or just stop to start, this situation we can look up the reasons for investigation and investigation, in fact, the idea is also very simple, this temporary engine can not start to be caused by two reasons, the first, the electricity does not pass. Second, the oil is not.
Check the reasons to consider these aspects, 1, start the motor, no sound, indicating no power, it is recommended to check whether the battery pile contact or burned out. If you are driving a PC56 or a Kobelco SK75 type, it is suggested that you first confirm that the hydraulic switch is locked, because there are many models, when the hydraulic switch is not opened, it is impossible to start, and the very humanized design will not adapt to some people who have just begun to contact.
2, start the motor moving, but the speed is slow, the sound is weak, indicating that the battery power is insufficient, it is recommended to check the generator belt is normal, it is best to measure the power quantity, if all normal, normally, you can only call the excavator boss, tell him two news, a bad news, one bad news, one bad news, one bad news, one bad news, one bad news, one bad news, one bad news, one bad news The good news, the bad news, is that the boss needs to pay for new batteries, and the good news is that it usually saves money by replacing old batteries with new ones.
3, start the motor, the speed is normal, the sound is normal, but the engine can't start. It shows that the oil has not arrived. It is suggested that you clean up the pipe of the diesel oil. The two easy to be blocked points are the small filter net at the bottom of the diesel oil box and the hand oil pump. It is also possible to enter the air when changing the filter element, unscrew the exhaust screw, and use the hand oil pump to pump the oil, so that the air can be excluded. It is worth mentioning that many small excavators use a certain Yanmar engine, cancel the hand oil pump, and add a small electronic oil pump to the oil pipe that enters the diesel filter core, so we will hear the sound of the engine at the engine after opening the power supply. The small electronic pump and the high pressure electronic pump of the electric spray machine are two. Completely different concepts, this small electronic pump is to increase the function of diesel flow in the tubing, but once the pump has problems, it will also cause the engine to be unable to start, or immediately after the start of the fire.
The driver of a excavator sometimes meets the opposite problem, that is, it can't be extinguished, the key is pulled out, and it does not flameout. This is usually the case that the flameout line does not pull. It opens the hood of the engine, pushes the wire head in place, and can extinguish the fire, and the questions of the flameout line will also cause the impossible to start.
4, the cold car is easy to start, the hot car is difficult to start, and the usual understanding is different. The symptoms of this situation are, in the morning or when the temperature is low, it is easy to start. After the temperature of the machine is raised to a certain temperature, the extinguishing starts again, and it is impossible to start. It is necessary to wait until the machine is cooled to start again. This kind of situation is common in the old machine. It is usually considered that the oil quality of the diesel oil does not cause the wear of the diesel oil pump, the oil pump is needed, the oil pump is a professional technology, and the professional and storefront of the oil pump and the "Henan oil pump" are the most. In the past, there is an oil pump factory in Henan and later oil. When the pump factory went bankrupt, the master in the factory opened the store of the oil pump, and the relatives and neighbors followed. So now the "Henan oil pump" store is everywhere. I think they are the only people in China who do not want to improve the oil quality of the domestic diesel.
If you have been working hard and starting the engine, it is found that the excavator has no action, that is to say that you are an unlucky excavator driver. This symptom is like a bulldozer torque converter. No matter how large you put the accelerator, the excavator doesn't have any action. If the hydraulic problem is eliminated, there are two reasons for this phenomenon. First, the engine and the hydraulic pump are broken at the glue block, causing the engine spindle to rotate. Pass to the hydraulic pump, but I think the probability of such a horrible thing is very low. There is no movement symptoms, more situations may be another cause, that is, your hydraulic total switch has failed, the hydraulic total switch of the excavator usually has two kinds of design, one is the direct control of the hydraulic components, and the other is the electronic component control. Now the electronic components are controlled mostly, but it is also easier. Failure caused by failure.
There are some unusual situations, such as when you are driving an excavator in the mud, when suddenly there is a noise coming from the hydraulic pump. It is suggested that you put out the fire right away. Because you are likely to meet the worst situation in the history of a excavator driving, it is that the running oil pipe is detonating in the silt, and all the hydraulic oil has been leaked into the walking bracket. This is a very troublesome matter. Fortunately, I am driving my own excavator without listening to the growling complaints of my boss. But the price I pay is: one dress, including shoes, one day, and ten barrels of 18 liters of hydraulic oil.
There is also a very terrible and dangerous situation. There must be few people. Unless you are as bad as me, it is the excavator's action. Everyone knows that the handle of the excavator is an action in each direction, the handle is in the middle, and the excavator is not moving, but if the handle is on the handle, but if the handle is handled. In the middle position, the excavator continues to move. Can you imagine what a horrible thing it is? And why does this happen?
The reason I met was because a large amount of iron powder appeared in the hydraulic oil of the entire hydraulic system, causing a pilot switch (commonly known as a bullet head), or a small filter block at the pilot's switch. A large quantity of iron powder in hydraulic oil is connected to the hydraulic system from the walking gearbox.
There are all kinds of "cold" symptoms, such as the high temperature of the engine, the powerlessness of the machine, and the bubble of the auxiliary tank, that is, the cushion of the cylinder bed, which is a small problem, but there will be a big trouble immediately. Therefore, we usually need to observe more when we work, aiming at all kinds of symptoms and prescribe the right medicine.
For our engineering robot, machinery is an investment, a production tool, but also a working partner, you are good to him, he will naturally be good for you!
