The Volvo excavator suddenly emitted black smoke, and it couldn t refuel

1. Reasons. 1.The flammable mixture is too thick.

2.There is too much oil in the engine fuel. 3.

Poor piston ring or crankshaft oil seal sealing. 4.There is moisture in the fuel.

5.Bad spark plug 6The air filter is too dirty.

2. Fault diagnosis and elimination.

1.For the inspection and diagnosis of excessive concentration of combustible mixtures, the carburetor and air filter should be checked.

2.The blend does not compare with the blend of the oil, or the wrong grade of oil is used. If the oil mixture contains too much oil or the oil quality is poor, the oil of the flammable mixture cannot be completely burned, resulting in black smoke.

The above phenomenon can also occur in two-stroke engines with separate lubrication and oil pump misalignment and excessive oil supply. At this time, the oil pump should be checked and adjusted according to the regulations to ensure that the lubricating oil is supplied proportionally at different throttle openings.

3.Excessive wear or breakage in a four-stroke engine, as well as too much oil in the crankcase, can cause oil to string into the combustion chamber and cause excessive oil in the mixture. If the crankshaft oil seal of a two-stroke engine is broken, it will also cause the oil from the transmission to string into the crankcase and enter the combustion chamber with the mixture.

4.One of the reasons for the mixing of water in the fuel is that the fuel in the fuel tank itself contains water, so the fuel tank should be cleaned and the fuel should be replaced. Another reason is that the cylinder gasket of the water-cooled engine is broken, and cold water enters the cylinder.

If, in the absence of leakage, the water in the tank is consumed too quickly, and the exhaust smoke from the exhaust pipe is slightly white, this is mostly the reason and the head gasket should be replaced.

Black smoke from gasoline engines is rare, black smoke is mainly not completely burned fuel in the combustion chamber, in the case of high temperature and lack of oxygen, diesel can not be completely and fully combusted, so decomposition and aggregation to form soot, it is a small diameter of the aggregate.

Because this aggregate reacts much slower than gasified fuel, due to the high temperature and anoxic environment of the combustion chamber, it cannot be fully burned again and is discharged through the exhaust pipe, so black smoke is presented.

The direct consequence of this phenomenon is that the fuel consumption of diesel engines is very high, the power is reduced, and at the same time, a large amount of carbon deposits exist in the piston and piston ring valves. In severe cases, the piston rings will be jammed, the valve seal is not tight, and the air leakage will be accelerated, and at the same time, it will also accelerate the wear of parts, thereby reducing the service life of the engine, so this aspect should be paid special attention.

Oil spills. There are usually several reasons for oil leaks:

1. Valve oil leakage, valve oil leakage is generally because the valve is blocked or damaged, and the solution is to replace the valve.

2. The joint is loose, and the solution is to tighten the joint or replace the joint.

3. That is, you have problems with the pump and hydraulic oil pipe.

Summary. Hello, I am your exclusive elite technician, we promise to be attentive, careful, and attentive to answer your car questions. Hello, this Howo 380 direct dump truck, the engine yellow light is on, can not add oil, the reasons for the black smoke are as follows, the first is that your engine intake air flow meter is damaged, resulting in insufficient engine air supply, the second is that your oil pump and oil nozzle are damaged and the engine oil pressure can not be reached.

The third is that the quality of your diesel is too poor, or that there is too much water in the oil-water separator, and the fourth is that the internal parts of your engine are seriously worn, resulting in insufficient engine leakage cylinder pressure, in this case, it is recommended that you first clean up the oil supply system and the gas supply system to see if you can solve the problem, if you can't solve the problem, then you need to overhaul the engine.

Howo 380 direct dump truck, the yellow light of the engine is on, it can't be added to the oil, what is the problem of black smoke.

Hello, I am your search of the world Wang Hong is an elite technician, we promise to be attentive, careful, and dedicated to answering your car questions. Hello, this Howo 380 direct dump truck, the engine yellow light is on, can not add oil, the reasons for the black smoke are as follows, the first is that your engine intake air flow meter is damaged, resulting in insufficient engine air supply, the second is that your oil pump and oil nozzle are damaged and the engine oil pressure can not be reached. The third thing is that the quality of your diesel is too poor, or that there is too much water in the oil-water separator, and the fourth is that the internal parts of your engine are seriously worn, resulting in engine leakage and insufficient cylinder pressure.

Re-ignition is good again.

Since your car has a fault light, there must be a problem.

The ignition was re-ignited, and the faulty lights were gone.

It can only be said that if you have this failure, it has not affected you to continue to drive Xiaohe for the time being, because once your engine lights up, then it must be a part of the engine control system that has a fault with Shan Shenkai, I suggest that you have better go to check it and tease it.

1. The air filter or filial piety cleaner is blocked, the air intake is too small, and the combustion is incomplete. 2. The oil supply time is incorrect. 3. If the intake valve clearance is too small, it will also cause the excavator to emit black smoke failure.

4. Diesel is too dirty. 5. Hydraulic suffocation. 6. The oil supply of the diesel pump is too large, the physicochemical of the grease nozzle is not good, and the oil dripping from the grease nozzle causes the black smoke failure of the digging machine.

7. The quality of the diesel used is too poor. 8. The pressure of the excavator cylinder is insufficient and the combustion is not sufficient, resulting in black smoke from the excavator. Excavator black smoke fault maintenance:

1. First of all, check the diesel used by the excavator after the failure occurs. 2 Secondly, check the oil supply of the excavator diesel pump. 3 Then check the excavator air filter later.

4. Adjust the excavator injector in time, replace the fuel injector with poor atomization, and calibrate the diesel pump. 5. If the above points are done, and the black smoke fault of the excavator cannot be ruled out, then check the hydraulic system of the excavator. Added:

When the excavator is operating, if you step on the accelerator, the excavator will also emit black smoke. At this time, it may be due to the poor sealing of the cylinder of the excavator, or the wear of the cylinder piston and cylinder liner of the excavator.

It can be divided into two situations: one is the excavation is weak, the engine does not hold the car, and the load is very light; The second is digging weakness, when the boom or stick extends to the end, the engine is seriously suffocated, or even stalled.

The digging is weak, but the engine does not hold the car. The size of the digging force is determined by the output pressure of the main pump, and whether the engine holds the car depends on the relationship between the absorbed torque of the oil pump and the output torque of the engine. The engine does not hold the car, which means that the oil pump absorbs less torque and the engine load is light.

If there is no obvious abnormality in the working speed of the excavator, the maximum output pressure of the main pump, that is, the system overflow pressure, should be checked. If the measured value of the overflow pressure is lower than the specified value, it indicates that the overload relief valve setting value of the hydraulic circuit of the mechanism is incorrect, resulting in premature overflow of the mechanism and weak operation. The machine can be adjusted by turning the adjustment screws.

The excavation is weak, and the engine is holding the car. The engine is holding the car, indicating that the absorbed torque of the oil pump is greater than the engine output torque, resulting in overload of the engine. In the case of such a fault, the engine speed sensing system should first be checked for normality, similar to the engine inspection method described above.

After the above detailed inspection and troubleshooting, the engine speed sensing system will return to normal function, the engine suffocation phenomenon will disappear, and the excavation force will return to normal.

Answer: Hello, the excavator engine is weak or the phenomenon of slowing down when working is generally caused by the poor oil supply of the fuel oil circuit, and the reasons for the weakness of the Volvo 210 excavator engine are as follows: 1. The impurities in the fuel block the filter. 2. The water in the fuel is not discharged in time, and the filter paper in the filter element is deteriorated after soaking in water, resulting in poor filtration.

3 The weather is cold, the fuel label used does not meet the ambient temperature requirements, and the paraffin condensation in the fuel blocks the filter and oil circuit. 4 The vent of the fuel tank is blocked. Volvo 210 excavator engine working powerless solution:

1. Clean the fuel circuit; 2 Discharge water and impurities in the fuel tank. 3. Clean the oil-water separator; 4. Replace the fuel filter element and clean the filter screen in the oil inlet bolt of the fuel transfer pump. 5 When replacing a fuel filter, be sure to fill the fuel filter with clean fuel before installing a new one.

6 After the fuel filter is installed, loosen the exhaust bolt on the upper part of the fuel filter, pump the oil with a hand pump, and drain the fuel air. If the inspection confirms that the fuel circuit is normal, the air intake system should be further checked for blockage or other abnormalities.

Causes of failure: 1. Generally, it is possible that the diesel filter is blocked or the air intake in the oil circuit is 2, and it is also possible that the oil pump is broken, which will lead to the inability to work Hu Ming black smoke 3, the intake and exhaust valve clearance is too large, and the work will be unable to emit black smoke 4, the cylinder head piston is worn out, resulting in the inability to work and black smoke 6, and it may be that the main bearing is worn out, and the specific reasons should be checked step by step for fault maintenance: 1. See if the diesel filter is blocked, and it needs to be cleaned. 2. Whether the oil pump is broken, it should be replaced in time, 3. There is too much intake and exhaust valve clearance will lead to weakness, 4. Check whether the cylinder gasket is washed out, 5. Next, look at whether the cylinder head piston, piston ring, and main bearing are worn and damaged, 6. Find out the crux of the problem after the first easy and then difficult, and carry out the corresponding repair treatment.

Hello dear, I'm glad to serve you, and will try to help you answer it!The 18-year-old Lovol 80 excavator emits black smoke and has no energy to emit black smoke, that is, there are the following reasons, when the first engine power is insufficient, when it increases the amount of fuel injected into the cylinder, it does not burn sufficiently, so it emits black smoke. This problem is a normal phenomenon, for example, when you dig in the soil, you dig up a rock, and the engine will emit a puff of black smoke.

Second, the engine maintenance is not enough, due to the excavator plus more diesel impurities, the fuel filter element service cycle becomes shorter, which will also cause the engine to emit black smoke, insufficient power, stuffy car and other situations. The third is that the engine fuel injector is broken, can not atomize the injection into the cylinder, causing black smoke, this situation as long as the cylinder is broken test, find the replacement of the fuel injector, but also can quickly solve the problem I hope I can help you in front of the hall, if you are not clear, you can continue to ask, do not need to end the consultation, I will answer for you as soon as possible, if you feel satisfied pro can help give a 5-star like, your satisfaction is my biggest motivation, thank you!