Second-hand Hitachi excavators repair and maintenance guide

In the construction engineering, mining and other industries, excavators are one of the most common heavy machinery. As the equipment is used for a longer time, the demand for second-hand excavators continues to increase, especially the cost effective second-hand Hitachi excavators have become the first choice of many companies. For second-hand Hitachi excavators, good repair and maintenance are essential, which can not only extend the service life of the equipment, but also effectively improve work efficiency.

Check the hydraulic system regularly

The hydraulic system is one of the most critical parts of the excavator, which directly affects the work efficiency and stability of the equipment. Regularly checking the oil level and oil quality of the hydraulic oil is an important task in maintenance. The cleanliness of the hydraulic oil must be guaranteed to prevent impurities and moisture from entering the system. If the color of the hydraulic oil becomes darker or impurities appear, it must be replaced in time. In addition, check whether there is oil leakage in the hydraulic pipeline, and clean all oil seals and seals to prevent hydraulic system failure.

Pay attention to engine maintenance

The engine is the “heart” of the second-hand Hitachi excavator, and regular maintenance can effectively reduce the occurrence of failures. First of all, it is necessary to regularly replace the engine oil, oil filter and air filter to keep the engine in good operating condition. In cold seasons, pay special attention to the inspection of antifreeze to ensure that the liquid will not freeze due to low temperature. Secondly, check whether the cooling system is working properly, especially in high-temperature working environments, it is very important to keep the engine temperature stable.

Check the hydraulic oil and fuel system

Hydraulic oil is a core part of a second-hand Hitachi excavator. Ensure the cleanliness and sufficient oil level of the hydraulic oil to avoid wear of the oil pump and hydraulic valve. In addition, the fuel system also needs to be checked regularly to keep the oil circuit unobstructed to prevent impurities in the fuel from clogging the injector nozzle, causing incomplete combustion and reducing engine efficiency.

Check the track system

The track is also one of the key components of a second-hand Hitachi excavator, which is related to the walking performance of the machine. During use, the track needs to be checked frequently, especially the tension, wear and damage of the track. If the tension of the track is found to be too large or too loose, it should be adjusted immediately. In addition, check the wear of components such as the track chain and gears, and regularly clean the dirt and debris on the track to avoid affecting the walking performance.

Regular cleaning and lubrication

After long-term use, excavators are prone to accumulate dust and dirt, which not only affects the heat dissipation performance of the equipment, but may also cause wear of components. Regularly cleaning external dust and dirt, and lubricating joints and rotating parts with special lubricants can effectively reduce friction and extend the service life of mechanical parts. At the same time, keeping the inside of the equipment clean can also help detect potential faults and problems.

Regularly check the electrical system

The electrical system is an important part of second-hand Hitachi excavators, especially second-hand equipment. Electrical components may age due to long service life. Regularly checking the battery power, whether the wires are aging, and whether the connectors are loose can help avoid the equipment from failing to start or lacking power at critical moments.

Professional maintenance and technical support

Although second-hand Hitachi excavators can extend their service life through regular maintenance, if complex faults or equipment performance declines, it is best to contact professional maintenance personnel for maintenance in a timely manner. Using non-original accessories or unprofessional maintenance may cause more serious equipment damage and even affect work safety.

Conclusion

The maintenance and repair of used Hitachi excavators is the key to ensuring the long-term and stable operation of the equipment. By regularly checking the hydraulic system, engine, track system, electrical components, etc., replacing worn parts in a timely manner, and cleaning and lubricating mechanical parts, you can effectively extend the service life of the equipment and improve work efficiency. Regular professional maintenance not only helps prevent major equipment failures, but also ensures the safety of the construction site. Whether you buy a new or second-hand machine, the correct maintenance and care methods are the basis for ensuring the efficient operation of the excavator.