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Four key points for maintenance of second-hand excavators

13 Views Feb 21,2024

How to maintain a second-hand excavator? The purpose of implementing regular maintenance is to reduce machine malfunctions and extend the service life of the machine; Shorten the downtime of the machine; Improve work efficiency and reduce homework costs. By managing fuel, lubricating oil, water, and air well, problems can be greatly reduced.


1. The management of fuel should choose different grades of diesel based on different environmental temperatures; Diesel fuel should not be mixed with impurities, ash, soil, and water, otherwise it will cause premature wear of the fuel pump; The high content of paraffin and sulfur in inferior fuel can cause damage to the engine; After completing daily homework, the fuel tank should be filled with fuel to avoid water droplets on the inner wall of the fuel tank; Open the drain valve at the bottom of the fuel tank before daily homework to drain water; After the excavator has run out of fuel or replaced the filter element, the air in the circuit must be discharged. The minimum ambient temperature is 0 ℃ -10 ℃ -20 ℃ -30 ℃ for diesel grades 0 #, 10 #, 20 #, and 35 #.

2. Management of Other Oils Other oils include engine oil, hydraulic oil, gear oil, etc; Different grades and grades of oil cannot be mixed together; Different types of excavator oils have different chemical or physical additives added during the consumption process; Ensure cleanliness with oil and avoid mixing impurities (water, dust, particles, etc.); Select the oil grade based on environmental temperature and usage. When the ambient temperature is high, high viscosity engine oil should be used, and when the ambient temperature is low, low viscosity engine oil should be used; The viscosity of gear oil is relatively high to accommodate larger transmission loads, while the viscosity of hydraulic oil is relatively low to reduce liquid movement resistance.

3. Smooth oil management using smooth oil (butter) can reduce wear and tear on the surface of sports and avoid noise. When storing and storing smooth grease, dust, sand, water, and other impurities should not be mixed in; Recommend using lithium based smooth grease g2-l1, which has good anti-wear performance and is suitable for heavy-duty working conditions; When adding, try to squeeze out all the old oil and wipe it clean to avoid sand adhesion.

4. The maintenance of the excavator filter element plays a role in filtering impurities in the oil or gas circuit, preventing them from entering the system and causing problems; Various filter elements should be regularly replaced according to the requirements of the operation and maintenance manual; When replacing the filter element, it is necessary to check if there are any metal particles attached to the old filter element. If any metal particles are found, timely diagnosis and improvement measures should be taken; Use pure filter elements that conform to machine rules. The filtering ability of fake and inferior filter elements is poor, and the quality of the filtering layer and data do not meet the requirements, which will seriously affect the normal operation of the machine.

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