What should I do if the Cummins diesel generator set is flooded?

When it is found that the Cummins generator set used is flooded, check whether the oil cooler is leaking, conduct pressure test treatment, and find out the leakage point for treatment or replacement.

Secondly, the most direct and effective way to deal with the external water ingress of the generator is to make a simple shed to protect the generator set and check the drainage system regularly.

If the water pump is leaking, check the water seal, and replace the water pump directly if necessary.

If the cylinder liner is leaking, replace the rubber ring of the cylinder liner.

If the cylinder block of the diesel engine is broken, the problem is relatively large, and it is generally better to replace it directly.

In addition, the cylinder gasket of the diesel generator is damaged, and the cooling water of the cylinder block enters the oil duct and then flows into the oil pan. The water blocking ring of the wet cylinder liner is damaged, and due to the high water level of the radiator of the water tank, the water seeps into the oil circuit along the outer wall of the cylinder liner. If the oil cooler is damaged, the oil cooler is circulated with water or coolant, or after the oil cooler is broken, the water inside will enter the oil path, and the oil will also enter the water tank and mix together.

1. When it is found that the diesel generator is flooded, if the generator set is running, it will be shut down immediately, and it is not allowed to be turned on in the shutdown state.

2. Then one side of the diesel generator is supported and raised with a hard object, so that the oil drain part of the engine oil pan is in the lowest position, the oil drain plug is unscrewed, and the oil ruler is pulled out to make the water in the oil pan flow out by itself. When the oil is just about to be released, a part of the oil and water should be released slightly, and then the oil drain plug should be screwed on.

3. Remove the air filter, replace the new filter element and soak it in oil.

4. Disassemble the lower intake, exhaust pipe and muffler below to remove the water in the pipe. Turn on the decompression, shake the diesel engine to generate electricity, observe whether there is water discharged from the inlet and exhaust ports, and continue to shake the crankshaft until the water in the cylinder is completely discharged. Install the intake and exhaust pipes and muffler, add a little oil to the air intake, shake the crankshaft a few times, and then install the air filter.

5. Remove the fuel tank, drain all the oil and water in it, check whether there is water in the fuel system, and drain it.

6. Release the sewage in the water tank and the waterway, clean the waterway, add clean river water or boiled well water until the water float rises. Turn on the throttle switch and start the diesel engine. After the diesel engine starts, pay attention to the rise of the oil indicator and listen to the abnormal sound of the diesel engine.

After checking whether all parts are normal, run in the diesel engine, idle first, then medium speed, and then high speed in the run-in sequence, and the running time is 5min each. After running-in, stop the machine to release the oil. Re-add new engine oil, start the diesel engine, and run at medium speed for 5min, and then it can be used normally.

7. Disassemble the development motor, check the stator and rotor inside the generator, and then dry it before assembly.

Hello, 1. The water tank leaks or the lack of antifreeze causes the engine heat to be dissipated and the temperature to be lowered in time. 2. The antifreeze deteriorates, the boiling point parameter decreases, and the cooling effect is affected by the ridge; Or the potato is anti-rust quality is reduced, forming a blockage in the circulating pipe of the water tank. 3. The temperature is high, the air conditioner is overloaded, and the radiator components are faulty, resulting in high engine temperature.

4. The electronic fan is faulty, resulting in insufficient fan speed, or the fan air ring is damaged, and the air leakage is serious.

1. The decline of the working performance of the injector.

The injection pressure of the syringe is too low, and the phenomenon of nebulization malnutrition and dropping, such as insufficient combustion causes the oil, along the cylinder wall into the oil pan excess diesel.

2. The compression ratio of the cylinder is too small. The piston ring opens a large gap, the piston, the piston and the cylinder wall with the large clearance, resulting in a compression ratio that is too small, the cylinder causes incomplete combustion, down into the oil pan, the cylinder wall of additional fuel. Common failures are:

The low pressure of oil, the temperature of oil and water, the weakness of the diesel engine and the lower crankcase have serious gases.

3. The number of cylinders entering the cylinder is reduced. When the blockage caused by the air filter increases, the resistance will lead to the amount of air entering the cylinder to reduce the amount of air entering the cylinder wall, resulting in incomplete combustion and excess diesel boilers; When the intake pipe leaks or stamps are damaged, it will lead to the reduction of entering the cylinder wall, resulting in incomplete combustion and excess diesel boilers; When the supercharger is damaged, the amount of air entering the cylinder is reduced, resulting in incomplete combustion and excess diesel boiler entering the cylinder wall. The above problems can cause the oil pan oil level to rise.

4. There is leakage in the fuel injection pump. Fuel injection pump leakage in the form of p, poor sealing of the contact ring, channel piston sleeve and fuel injection pump casing; The piston accident, one wears too big, is a bad oil injection pump valve sealing gasket; The piston oil pump follows too much.

5. Perforation. If the gear chamber (fuel injection pump and timing gear chamber installed through the fixing plate) is driven directly by the diesel engine fuel injection pump at the time, either by forced lubrication by oil pressure or causing a sensation, the fuel injection pump lubrication leaks diesel oil through the camshaft timing gear chamber and again enters the seal of the oil pan. However, leaking fuel splash lubrication is minimal, and the forced-lubricated fuel injection pump can also pass through the oil lubrication line into the oil pan.

If the diesel engine drives the fuel injection pump through the coupling (the fuel injection pump is installed on the cylinder side, away from the timing gear room,) only the oil pressure required to lubricate the leaking diesel fuel through the fuel injection pump, the timing gear can pass through the word (oil leakage, low pressure diesel pressure).

Water generation: 1. The lubricating oil itself has moisture--- please carefully add the lubricating oil that meets the manufacturer's recommended requirements; 2. The unit is in a non-working and humid environment for a long time - please turn on the machine regularly to keep the unit on standby, and at the same time, please keep the environment in a reasonable and dry working state to facilitate the service life of the unit;

3. Please check the cooling water system for leakage, especially at the water pump;

4. Check the condition of the cylinder block to see if there is overheating and cracks;

It should be where there is a leak in the cooling water circuit, perhaps at the head gasket.

In reality, in addition to water leakage, the phenomenon of high water consumption of diesel engines is extremely rare.

If you want to list the reasons, you can have the following aspects:

The lower sealing ring of the cylinder liner is damaged, and the cooling water leaks into the oil pan. (The problem is that the oil level is checked every day, and the oil level rises and is easy to spot.) ）

The cylinder gasket is broken, the water channel is connected to the cylinder, and part of the cooling water is discharged from the exhaust pipe and part of it enters the oil pan. (You can see white smoke exhausting and the oil level rising.) ）

leaking water pipes; Leaking water pump packing seal; water leakage in the body; The cylinder head has trachoma. (This can be found.) ）

The engine temperature is high, and the cooling water evaporates a lot. There are many reasons why the engine temperature is high, such as excessive load; ignition too early or too late; The amount of oil is too large, the atomization is not good, and the combustion is poor; Poor heat dissipation; large internal resistance of the engine; or the wear of the parts is too large, and the impact generates heat; inaccurate timing; poor environmental ventilation; ......

It is necessary to carefully find the cause and carry out maintenance.

Third, the regulator or generator is faulty.