If an excavator stalls and you become bald, just learn this trick!
Posted: Mar 4th, '25, 02:45
When you encounter a stalling problem, first don't be anxious, and secondly, check it according to the actual situation. Usually start from the engine, hydraulics, circuit system and component connections.
Engine problem
Hydraulic pump
Stalling is usually caused by a decrease in engine power. It is necessary to reduce the power demand of the hydraulic pump. You can adjust the pump's adjuster nut. After adjustment, the stalling phenomenon will usually improve. But you will find that the excavator's movement will become slower and the force will be weaker, so this method is only a temporary solution.
Engine
You can also increase the power of the engine. Many times, there is a problem with the diesel pump, which causes the engine's power to decrease. Sometimes it is accompanied by the phenomenon that the cold car is easy to start and the hot car cannot start. At this time, as long as the oil pump is calibrated and the plunger nozzle is replaced, the problem can usually be solved.
Supercharger
Of course, insufficient engine intake will also induce stalling. Usually, the reasons for insufficient engine intake are: the air filter is blocked, causing the supercharger to not work completely; the supercharger is worn; the exhaust branch pipe leaks and the exhaust volume is reduced. Special note: if the supercharger needs to be replaced at any time, remember to drip a few drops of engine oil into the supercharger to achieve lubrication, and at the same time check whether the small oil pipe connecting the engine body to the supercharger is unobstructed.
Oil problem
Diesel quality
Many engine friends have mentioned that due to excessive impurities in the oil, the filter is blocked, the oil line is blocked, there are too many impurities in the fuel tank, and the engine power is reduced. Problems. Usually, the oil provided by private gas stations or construction sites and oil trucks are of poor quality, with high water content and many impurities. Long-term use of such oil will not only damage the engine, but is often the biggest cause of engine stalling. Therefore, it is recommended that you must choose a regular oil supply channel. It is recommended to use Sinopec's oil. Although the price is more expensive, the oil quality is guaranteed.
Oil model (diesel & engine oil)
Sometimes stalling occurs in winter. Due to the low outside temperature, if the oil model is not selected properly, the viscosity of the diesel will increase, and the filter at the diesel tank connecting to the engine will be blocked, and the oil supply will be poor, which will eventually lead to stalling. Special reminder: Please carefully choose the appropriate type of diesel according to the local actual situation and temperature in winter.
Some friends also have engine blockage in summer, and the problem also occurs in the oil model. Some enthusiastic friends suggest that 10W-50W engine oil can be used in high temperature seasons. The engine oil problem may be the easiest for many friends to ignore.
Identify fake oil
Be sure to choose genuine and high-quality oil. For example, the common engine oil brands on the market are Mobil, BP, Shell, etc. Fake engine oil is rampant on the market. It is recommended to buy it in a regular store, and you can also identify it by price comparison.
Oil change cycle
Be sure to change the engine oil regularly. Oil deterioration is also one of the causes of engine blockage. Everything has a certain shelf life, and engine oil is no exception. Some friends suggest changing it every 250-300 hours. Some special models may have a slightly longer cycle, such as Komatsu excavators, which are changed about every 500 hours. (The above data is for reference only.)
In addition, the hydraulic oil should be replaced according to the prescribed maintenance cycle. When the crusher is used, the hydraulic oil deteriorates and deteriorates faster, and the replacement cycle should be shortened. After replacing the hydraulic oil or hydraulic components, pay attention to exhausting the air.
Filtering problems
Filter element and filter paper
Wear of machine components, impurities in oil products, and the diesel model problems mentioned above will cause the diesel filter element to be blocked, the suction pipe filter to be blocked, the hand oil pump filter to be blocked, and other filter screens and filter elements to be blocked. Therefore, it is necessary to check whether the filter, filter element and oil circuit connection are unobstructed one by one. If there is blockage, clean it in time and replace it.
In addition, long-term operation in the mine will generate a lot of dust, so the air filter needs to be checked and cleaned regularly. When there is a lot of dust in the outer filter element, use compressed air to blow it from the inside to the outside. The air pressure should not be too high to prevent the filter element from being blown out. The inner filter cannot be cleaned. After cleaning the outer filter 2 or 3 times, replace it with a new one at the same time as the inner filter.
Special reminder: You must buy genuine filter element and filter paper, because genuine filter element and filter paper are fine and can intercept a large amount of impurities, so they are easier to clog and have a shorter replacement cycle than the secondary filter element. Therefore, it is not that the filter element that does not clog for a long time is a good filter element.
Wear and aging of parts
Some places are also the most easily overlooked by many machine friends when checking for stuck cars, such as wear and aging of parts. Many machine friends will first consider whether the power requirements of the engine and diesel pump are met. When you find that there are no problems with these, please check whether the engine cylinder liner piston is worn, and whether there is a possibility of oil leakage and air leakage in other parts of the engine and hydraulic system. If there is any abnormality, it must be repaired in time.
Fuel system problems
Due to the long-term use of inferior oil products, a large amount of impurities are generated at the bottom of the fuel tank, so it is necessary to regularly clean the fuel tank, dredge the oil pipeline and the oil pipeline connection.
In addition, the oil-water separator is also a place that is easily overlooked. It is necessary to regularly check whether the water-oil separation of the oil-water separator is normal. In addition, it is necessary to regularly open the drain valve at the bottom to drain water to avoid the excavator stuck due to excessive water storage.
Engine problem
Hydraulic pump
Stalling is usually caused by a decrease in engine power. It is necessary to reduce the power demand of the hydraulic pump. You can adjust the pump's adjuster nut. After adjustment, the stalling phenomenon will usually improve. But you will find that the excavator's movement will become slower and the force will be weaker, so this method is only a temporary solution.
Engine
You can also increase the power of the engine. Many times, there is a problem with the diesel pump, which causes the engine's power to decrease. Sometimes it is accompanied by the phenomenon that the cold car is easy to start and the hot car cannot start. At this time, as long as the oil pump is calibrated and the plunger nozzle is replaced, the problem can usually be solved.
Supercharger
Of course, insufficient engine intake will also induce stalling. Usually, the reasons for insufficient engine intake are: the air filter is blocked, causing the supercharger to not work completely; the supercharger is worn; the exhaust branch pipe leaks and the exhaust volume is reduced. Special note: if the supercharger needs to be replaced at any time, remember to drip a few drops of engine oil into the supercharger to achieve lubrication, and at the same time check whether the small oil pipe connecting the engine body to the supercharger is unobstructed.
Oil problem
Diesel quality
Many engine friends have mentioned that due to excessive impurities in the oil, the filter is blocked, the oil line is blocked, there are too many impurities in the fuel tank, and the engine power is reduced. Problems. Usually, the oil provided by private gas stations or construction sites and oil trucks are of poor quality, with high water content and many impurities. Long-term use of such oil will not only damage the engine, but is often the biggest cause of engine stalling. Therefore, it is recommended that you must choose a regular oil supply channel. It is recommended to use Sinopec's oil. Although the price is more expensive, the oil quality is guaranteed.
Oil model (diesel & engine oil)
Sometimes stalling occurs in winter. Due to the low outside temperature, if the oil model is not selected properly, the viscosity of the diesel will increase, and the filter at the diesel tank connecting to the engine will be blocked, and the oil supply will be poor, which will eventually lead to stalling. Special reminder: Please carefully choose the appropriate type of diesel according to the local actual situation and temperature in winter.
Some friends also have engine blockage in summer, and the problem also occurs in the oil model. Some enthusiastic friends suggest that 10W-50W engine oil can be used in high temperature seasons. The engine oil problem may be the easiest for many friends to ignore.
Identify fake oil
Be sure to choose genuine and high-quality oil. For example, the common engine oil brands on the market are Mobil, BP, Shell, etc. Fake engine oil is rampant on the market. It is recommended to buy it in a regular store, and you can also identify it by price comparison.
Oil change cycle
Be sure to change the engine oil regularly. Oil deterioration is also one of the causes of engine blockage. Everything has a certain shelf life, and engine oil is no exception. Some friends suggest changing it every 250-300 hours. Some special models may have a slightly longer cycle, such as Komatsu excavators, which are changed about every 500 hours. (The above data is for reference only.)
In addition, the hydraulic oil should be replaced according to the prescribed maintenance cycle. When the crusher is used, the hydraulic oil deteriorates and deteriorates faster, and the replacement cycle should be shortened. After replacing the hydraulic oil or hydraulic components, pay attention to exhausting the air.
Filtering problems
Filter element and filter paper
Wear of machine components, impurities in oil products, and the diesel model problems mentioned above will cause the diesel filter element to be blocked, the suction pipe filter to be blocked, the hand oil pump filter to be blocked, and other filter screens and filter elements to be blocked. Therefore, it is necessary to check whether the filter, filter element and oil circuit connection are unobstructed one by one. If there is blockage, clean it in time and replace it.
In addition, long-term operation in the mine will generate a lot of dust, so the air filter needs to be checked and cleaned regularly. When there is a lot of dust in the outer filter element, use compressed air to blow it from the inside to the outside. The air pressure should not be too high to prevent the filter element from being blown out. The inner filter cannot be cleaned. After cleaning the outer filter 2 or 3 times, replace it with a new one at the same time as the inner filter.
Special reminder: You must buy genuine filter element and filter paper, because genuine filter element and filter paper are fine and can intercept a large amount of impurities, so they are easier to clog and have a shorter replacement cycle than the secondary filter element. Therefore, it is not that the filter element that does not clog for a long time is a good filter element.
Wear and aging of parts
Some places are also the most easily overlooked by many machine friends when checking for stuck cars, such as wear and aging of parts. Many machine friends will first consider whether the power requirements of the engine and diesel pump are met. When you find that there are no problems with these, please check whether the engine cylinder liner piston is worn, and whether there is a possibility of oil leakage and air leakage in other parts of the engine and hydraulic system. If there is any abnormality, it must be repaired in time.
Fuel system problems
Due to the long-term use of inferior oil products, a large amount of impurities are generated at the bottom of the fuel tank, so it is necessary to regularly clean the fuel tank, dredge the oil pipeline and the oil pipeline connection.
In addition, the oil-water separator is also a place that is easily overlooked. It is necessary to regularly check whether the water-oil separation of the oil-water separator is normal. In addition, it is necessary to regularly open the drain valve at the bottom to drain water to avoid the excavator stuck due to excessive water storage.