At first, the excavator is manual. It has been more than one hundred and thirty years since the invention. During the period, it has experienced the gradual development process of the steam-driven bucket rotary excavator to the electric drive and the internal combustion engine driven rotary excavator, and the automatic hydraulic excavator with the integration of electromechanical and hydraulic technology. Maintenance excavator The first hydraulic excavator was invented successfully by the French Poclane factory. Because of the application of hydraulic technology, in the 1940s there was a hydraulic backhoe mounted on the tractor suspension type excavator. The three most important parameters of excavator maintenance are operating weight (mass), engine power and bucket capacity. The purpose of regular maintenance of excavator is to reduce the failure of enterprise machine and prolong the service life of machine learning network. Reduce the downtime of production machines; Improve the efficiency of students' working environment and reduce the cost of logistics operation design. With good management of fuel, lubricants, water and air, you can reduce failures by 70%. In fact, about 70 percent of failures are due to poor management of information.

1.Fuel management

According to different ambient temperature to choose different brands of diesel; Diesel fuel not mixed with impurities, dust and water will keep the fuel pump premature wear; High levels of poor quality fuel neutralize sulfur in paraffin wax, resulting in engine damage; Daily operation to fill the fuel tank to prevent water droplets from the inner wall behind the fuel tank; Routine work before opening the fuel drain bottom discharge valve; The engine runs out of fuel or after the filter is replaced, although the air discharge channel is in. Minimum ambient temperature 0℃-10℃-20℃-30℃ diesel, 0 # -10 # -20 # -35 # grade.

2. other system oil management

Other oils include oil, hydraulic oil, gear oil, etc. Different grades and different grades of oil can not be mixed and put;

Different varieties of mining oil in the production process to add chemical or physical additives;

Clean the oil to prevent sundries (water, dust, particles, etc.) from mixing.); Choose oil labels according to ambient temperature and usage. Should choose high ambient temperature oil, low ambient temperature oil should choose low viscosity oil; The viscosity of gear oil is relatively large to adapt to the larger transmission load, and the viscosity of hydraulic oil is relatively small to reduce the flow resistance of the liquid. 

Table 2 Excavator oil tank external temperature ℃ oil type replacement cycle H replacement volume L type engine oil pan -35-20CDSAE5W-30250CDSAE10W-20-40CDSAE10W-30-15-50CDSAE15W-4024-20-100-40CDSAE30 rotary box 20-40CDSAE3010005.5CDSAE30 type shock absorber shell CDSAE10W5000PC200 type hydraulic tank: 239PC220:

246CDSAE10W-30CDSAE15W-40 Final drive CDSAE90:10005.4

3. lubrication grease management

The use of lubricating oil (butter) can reduce the movement of the surface, wear, to prevent the appearance of noise.

When the grease is stored, it cannot be mixed with dust, sand, water and other impurities.

It is recommended to choose G2-L1 type lithium grease, which has good wear resistance and is suitable for heavy load conditions. When filling, try to squeeze out all the old oil and clean it to prevent sand sticking.

4. Maintenance of filter element

The filter element plays the role of filtering impurities in the oil circuit or gas circuit to prevent it from entering the system and causing failure; various filter elements should be replaced regularly in accordance with the requirements of the (operation and maintenance manual); when replacing the filter element, check whether there is metal attached to the old On the filter element, if any metal particles are found, timely diagnose and take improvement measures; use the pure filter element that meets the machine regulations. The filtering capacity of the fake and inferior filter element is poor, and the surface of the filter layer and the quality of the material do not meet the requirements, which will seriously affect the normal use of the machine.