Second-hand excavator in-depth maintenance guide: tricks to extend service life

　　In the use of second-hand excavators, correct maintenance is the key to extend its service life and ensure performance. The following are some tricks for in-depth maintenance, which can make your second-hand excavator continue to create value for you stably.

　　Daily inspection is the basis

　　Before and after each use, the excavator should be carefully inspected. Before starting, check whether the coolant, engine oil, and hydraulic oil levels are within the normal range. Too low a level may cause engine overheating, insufficient lubrication, or hydraulic system failure. At the same time, check whether the fuel filter is blocked. If the fuel filter is found to be darker in color or has impurities, it should be replaced in time.

　　In terms of appearance inspection, pay attention to whether the body of the excavator has cracks, loose bolts, or signs of leakage. Especially at the joints and hydraulic pipe connections, if oil stains are found, further check whether there is a sealing problem. The wear of the tires or tracks cannot be ignored. Excessive wear will affect the walking stability and work efficiency of the excavator. For crawler excavators, check whether the tension of the crawler is appropriate. Too loose or too tight will accelerate the damage of the crawler.

　　Regular maintenance is essential

　　Regularly changing the engine oil and oil filter is an important step to keep the engine running well. Generally speaking, according to the frequency of use and working environment of the excavator, it needs to be replaced after a certain number of working hours. The engine oil will deteriorate after long-term use and lose its lubrication and heat dissipation capabilities, while the oil filter can effectively filter impurities and prevent them from entering the engine.

　　The air filter also needs to be cleaned or replaced regularly. In a dusty working environment, the air filter is prone to blockage, which will cause insufficient engine air intake, incomplete combustion, reduced power and increased fuel consumption. After working for a certain period of time, open the shell of the air filter, gently tap or blow from the inside to the outside with compressed air to remove dust. If the filter is severely blocked or damaged, it needs to be replaced with a new filter in time.

　　Maintenance of the hydraulic system is also crucial. Regularly check the quality of the hydraulic oil to see if there is emulsification, discoloration or odor. If there is a problem with the hydraulic oil, it will affect the working performance of the entire hydraulic system and even damage key components such as the hydraulic pump and cylinder. At the same time, check whether the pressure of the hydraulic system is normal and whether each hydraulic component has leakage or abnormal vibration.

　　Special maintenance of key components

　　For the engine of a second-hand excavator, it is necessary to regularly check the valve clearance, the working condition of the fuel injector, etc. If the valve clearance is too large or too small, it will affect the intake and exhaust efficiency of the engine. If the fuel injector is blocked or the spray is uneven, it will lead to incomplete combustion. Professional testing equipment can be used to ensure that these key components are in the best working condition.

　　The connection of the working device such as the excavator boom, dipper rod and bucket is prone to wear due to long-term huge force. Apply grease regularly and check the wear of parts such as pins and bushings. If severe wear is found, it should be replaced in time to avoid problems such as looseness and abnormal noise, which will affect the excavation accuracy and work efficiency.

　　In terms of the electrical system, check whether the wires are damaged or short-circuited, and whether each electrical component is working properly. Especially in humid or harsh working environments, more attention should be paid to moisture and rust prevention of the electrical system.

　　For the maintenance of second-hand excavators, we recommend choosing a professional maintenance team and high-quality accessories. On the Second-hand Excavator Network, you can find a lot of experience sharing on second-hand excavator maintenance and information about professional maintenance service providers. At the same time, we also have a second-hand excavator parts mall, providing all kinds of original and high-quality accessories to ensure that your maintenance work goes smoothly. Only by doing a good job of in-depth maintenance can your second-hand excavator play the greatest value, extend its service life, and help your engineering career.