When the excavator is used for a long time, it will produce natural wear, fatigue and loosening. The bad working environment is an important factor to aggravate the wear. Therefore, regular inspection and maintenance of the excavator can reduce the failure of the excavator, prolong the life of the excavator, shorten the time of the machine downtime, improve the working efficiency, and greatly reduce the operating cost and make the machine greatly reduced. The device reaches the best state.
Precautions for the maintenance of excavator
1 management of lubricating oil, hydraulic oil and gear oil
1) under the bad conditions (high temperature and high pressure), the oil of the engine and the working device will deteriorate. Therefore, the new oil should be replaced at the required time, even if the oil is not dirty.
2) oil to the machine is equivalent to the body of the human body of blood, the use must be careful, in order to prevent impurities (such as water, metal particles, dust, etc.) into which. The excavator in the operation of the fault, most of which are caused by mixing impurities in the oil.
3) it is strictly forbidden to mix oil with different grades and grades.
4) oil should be supplied according to the prescribed quantity.
5) when changing the oil, it is necessary to replace the oil filter at the same time.
6) in order to check the working state of the excavator, the quality of the oil should be analyzed regularly.
2 management of diesel oil
1) the fuel pump is a particularly precise component. If a diesel oil containing water or impurities is used, the fuel pump will be damaged and not work properly. Therefore, when the diesel is stored or added to the diesel, it should be particularly careful not to mix with water or sundries.
2) the diesel oil should be selected to meet the requirements of the brand. The diesel oil may be solidified at low temperature (especially at low temperature below -15 C), and suitable diesel oil should be selected according to the temperature.
3) to prevent moisture in the air from condensing into the fuel tank, the diesel should be filled with fuel tank after completion of the work.
4) before launching the engine or adding the diesel 10min, the sediment and water in the tank should be discharged.
5) after exhausting diesel oil or replacing diesel filters, air must be exhausted from the pipeline.
Management of 3 coolant
1) there is a lot of calcium and other sundries in the river, so if the machine uses the river, the scale will adhere to the inner wall of the engine and radiator, causing heat exchange and overheating. Do not use water that can not be used as a coolant.
2) the new machine's engine radiator is equipped with the original antifreeze of the excavator manufacturer. This antifreeze can effectively prevent the cooling system from being corroded, and can be used continuously for 2 years or 4000 H., so it can be used even in hot weather areas.
3) antifreeze is flammable, must pay attention to fireworks.
4) the proportion of antifreeze and water should be determined according to the ambient temperature.
5) the coolant should be added after the engine is cooled.
6) if the coolant level is low, the engine will overheat, and the air in the coolant will also corrode the cooling system.
4 management of oil and fat
1) adding grease can reduce wear on hinged joints and prevent distortion at hinged joints.
2) whenever any lubrication point is abnormal or the parts are not moving smoothly, grease should be added promptly, regardless of whether the lubrication cycle is reached or not.
3) when the grease is added, wipe out the old grease. The sand or dirt adhered to the grease will increase the wear of the rotating parts, so we must pay attention to it.
Maintenance of 5 oil filter
1) the oil filter is a very important element. It can prevent impurities from entering the oil road and gas road, thus reducing the occurrence of the fault. The filter oil filter should be replaced regularly according to the requirements. When the excavator is used under the bad conditions, the replacement period should be shortened according to the quality of the diesel (sulfur content).
2) do not clean the oil filter (cylindrical) and reuse it. New oil filters should be replaced.
3) when replacing the old filter, it should be checked whether there are metal particles, rubber residue and so on on the old filter core. If there are metal or rubber particles, the professional maintenance personnel should be asked to further examine and treat.
4) before using the oil filter, do not open the package too early.
6 selection of diesel, coolant and lubricating oil
(1) selection of diesel oil
Different brands of diesel should be selected according to different ambient temperatures.
(2) selection of other oil
Suitable oil is selected according to the environment and use. When the ambient temperature is high, the oil with large viscosity should be selected. When the ambient temperature is low, the viscosity of the oil should be small. The viscosity of the gear oil is relatively large to suit the larger transmission load. The viscosity of the hydraulic oil is relatively small, so as to reduce the flow resistance of the liquid.
(3) the selection of antifreeze
Try to choose permanent antifreeze. The antifreeze containing ethylene glycol should be used for a certain reason. It is best to underestimate the temperature by about 10 degrees centigrade when determining the mixing ratio.
