In the daily use of excavators, the maintenance and care of excavator accessories are crucial. Choosing high-performance or original excavator accessories is a key measure to effectively avoid failures and reduce the cost of use. However, once an excavator accessory has an abnormal condition, it must be handled in time to prevent more serious losses. Excessive abnormal noise or vibration failure of the excavator main pump is a common excavator failure problem. The following introduces the troubleshooting method of this type of failure.
Suction pipe blockage
Possibility: 70%, extremely harmful, and it is very easy to occur after the excavator has been used for a long time.
Cause: The oil suction filter is blocked due to long-term lack of cleaning and replacement, or dirt enters the oil tank and causes the oil filter to be blocked.
Harmful consequences: Poor oil suction will cause local vacuum phenomenon, and the air originally dissolved in the oil will be separated, causing strong vibration when the equipment is working, accelerating the premature damage of the excavator parts.
Countermeasures: Strictly follow the requirements of the technical manual and replace the filter element regularly; prevent dirt from entering the hydraulic oil tank; check the suction pipe regularly, and solve the problem immediately once it is found.
There is air in the hydraulic pump
Possibility: 60%, extremely harmful. When the oil is mixed with air, cavitation and cavitation will occur, which will not only cause excessive noise in the hydraulic pump, but also accelerate the premature damage of the equipment.
Countermeasures: Carefully check the parts where air may enter, and promptly remove the air mixed in the oil and pipeline.
Excessive oil viscosity
Possibility: 50%, extremely harmful. Excessive oil viscosity is usually caused by excessive use. Once this happens, it will make it difficult to absorb oil, cause a partial vacuum phenomenon, separate the air dissolved in the oil, cause the equipment to vibrate violently when working, and accelerate the premature damage of the excavator parts. In addition, excessive oil viscosity will also cause the filter element to fail prematurely and damage the excavator's oil pump.
Countermeasures: Check and replace the hydraulic oil in time according to the regulations.
The oil level in the hydraulic oil tank is too low
Possibility of insufficient oil: 40%, extremely dangerous. Too low oil level will prevent the pump from sucking in enough oil, and then suck in some air, causing strong vibrations in the working equipment and accelerating the premature damage of the excavator parts. At the same time, excessive oil viscosity will also cause the filter element to fail prematurely and damage the excavator oil pump.
Countermeasures: Regularly check whether the oil level in the hydraulic oil tank is within the normal range.
The bearing of the oil pump is worn too much
Probability: 30%, general harm. Bearing wear mainly occurs on excavators that have been working for a long time, which will produce loud noises, and the various parts of the excavator will show a weak state.
Countermeasures: Overhaul the oil pump.
The speed of the hydraulic pump is too high
Probability: 20%, general harm. Too high speed will not only produce excessive noise, but also cause premature damage to the excavator hydraulic pump. At this time, the performance of each working device of the excavator is normal.
Countermeasures: Adjust the speed of the pump.
keywords：Mini crawler excavator，Mini crawler excavator attachments，Excavator attachments，Crawler excavator，Mini excavator purchase
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