The solution of common faults of excavator turbocharger

[BONOVO]

The turbocharger of the excavatormainly increases the oxygen concentration into the combustion chamber by compressing the air to help the fuel burn fully and provide sufficient power. When the turbocharger is damaged, the excavatoris not powered enough, and the force will become smaller. Turbocharger common failure damage has the following aspects.

Turbocharger shaft broken

1. Insufficient oil lubrication, resulting in bearing wear

▸ oil is the lubricating oil of the turbocharger. When the speed of the turbocharger and the load of the diesel engine increase, the oil supply of the turbocharger will also increase accordingly. In this case, insufficient oil supply will cause damage to the bearing of the turbocharger, and even break the shaft.

▸ Lack of oil, oil level is too low or inhaled air, oil pressure is reduced, may also make the supercharger due to lack of oil damage;

▸ Whether the oil is replaced on time every 500 hours, if the oil is dirty, the oil fluidity is poor, the shaft of the supercharger will be correspondingly worn.

2. Seal damage, supercharger oil leakage

Troubleshooting method

➤ The turbine sealing ring and turbine blade sealing ring are damaged, the oil cannot be sealed, and the sealing ring needs to be replaced.

➤ The wear gap between shaft, bearing and bearing hole is too large, oil leakage;

➤ High oil pressure;

The supercharger blade is damaged

Foreign matter entering the turbocharger may cause damage to the blades of the turbocharger, which should be considered from the following aspects: investigation method

3.

▸ Is the air filter element original? If yes, confirm whether there are foreign bodies entering the replacement; In addition, confirm

Whether there are small parts entering when replacing the supercharger. If you do not replace the filter element or do not clean the foreign matter in the intake pipe and intercooler, even if you replace the new turbocharger, it will cause damage;

▸ Is the turbocharger an original part and has the quality guarantee? In the case of original parts, the possibility of damage should be considered and confirmed by the following factors:

a, whether the oil is original;

b, whether the oil is replaced on time every 500 hours, if the oil is dirty, the fluidity is poor, the shaft of the supercharger will be correspondingly worn, resulting in blade wear;

c, whether the oil deteriorates.

▸ If the exhaust gas temperature is too high, the middle shell of the turbocharger will overheat, and the turbocharger material will be deformed or corroded. Under the action of high load, there will be cracking and breakage of turbine blades.

‍ Turbocharger maintenance methods

1 Use authentic air filter and oil to replace and maintain the excavatoron time;

2 When starting the excavator, it should be ensured that there is a long enough time to idle until the oil pressure is stable before accelerating, so as to ensure that the bearings of the turbocharger are fully lubricated. Similarly, it is also necessary to idle for five minutes before stopping to prevent the supercharger from wearing out;

3 If the working environment is harsh and the dust is relatively large, the air filter element needs to be cleaned frequently to avoid debris deposition;

4 Buy genuine turbocharger replacement, such as non-genuine, the intake pressure is too large, in the long run will wear the supercharger.

The auxiliary factory or unlabeled outside looks the same as the original turbocharger, but the quality of the blade inside is not the same, and it cannot reach the air pressure that the blade inside the original turbocharger can compress.

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