The purpose of regular maintenance of the excavator is to reduce the failure of the machine and extend the service life of the machine. Reduce machine downtime; Improve work efficiency and reduce operating costs. As long as fuel, oil, water and air are well managed, failures can be reduced by 70%. In fact, about 70% of failures are due to poor management.
1. Fuel management
Different grades of diesel should be selected according to different ambient temperatures; Diesel oil can not be mixed with impurities, lime soil and water, otherwise it will cause premature wear of the fuel pump; The high content of paraffin and sulfur in inferior fuel will cause damage to the engine. The fuel tank should be filled with fuel after daily operation to prevent water droplets from the inner wall of the tank; Open the water drain valve at the bottom of the fuel tank before daily operation; After the engine fuel is used up or the filter element is replaced, the air in the road must be drained. Minimum ambient temperature 0℃ -10℃ -20℃ -30℃ Diesel grade 0# -10# -20# -35#.
2. Management of other oils
Other oils include engine oil, hydraulic oil, gear oil, etc.; Different grades and grades of oil can not be mixed; The chemical or physical additives added to different varieties of excavator oil in the production process are different; To ensure that the oil is clean, to prevent sundries (water, dust, particles, etc.) mixed; Select the oil label according to the ambient temperature and use. When the ambient temperature is high, oil with large viscosity should be selected, and oil with small viscosity should be selected when the ambient temperature is low. The viscosity of the gear oil is relatively large to adapt to the larger transmission load, and the viscosity of the hydraulic oil is relatively small to reduce the liquid flow resistance. Table 2 Selection of excavator oil Container External temperature ℃ Oil Type Replacement Period h Replacement amount L Engine oil sump -35-20 CD SAE 5W-30 250 24-20-10 CD SAE 10W-20-40 CD SAE 10W-30-15-50 CD SAE 15W-40 0-40 CD SAE 30 Rotary mechanism Case -20-40 CD SAE 30 1000 5.5 Shock Absorber housing CD SAE 30 6.8 Hydraulic Fuel tank CD SAE 10W 5000 PC200 model :239 PC220 Model :246 CD SAE 10W-30 CD SAE 15W-40 Final drive CD SAE90 1000 5.4
3. Lubricating oil management
The use of lubricating oil (butter) can reduce the wear of the moving surface and prevent noise. Grease shall not be mixed with dust, sand, water and other impurities when stored. It is recommended to use lithium grease G2-L1, which has good anti-wear performance and is suitable for heavy-duty working conditions. When filling, try to squeeze out all the old oil and wipe it clean to prevent sand adhesion.
4. Maintenance of filter element
The filter element plays the role of filtering impurities in the oil or gas path to prevent it from intruding into the system and causing failure; Various filter elements should be replaced regularly according to the requirements of the (operation and maintenance manual); When replacing the filter element, check whether there is metal attached to the old filter element, if there are metal particles found in time to diagnose and take improvement measures; Use pure filter element in accordance with the regulations of the machine. The filtration capacity of the fake 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.