Excavator with the increase in the use of time, some parts will occur wear and tear, rust or aging phenomenon, and the emergence of these phenomena will bring this or that kind of failure to the excavator, thus making the excavator can not work properly.

　　First look at the fuel system to see if the engine lacks diesel fuel, to see if the filter needs to be drained, etc.; and then look at whether the battery power is sufficient, whether the electric line is burnt, blackened, broken, etc.; to see whether the starter motor speed is too low or does not turn at all; to see whether there are problems in the cooling system, such as damage to the cooling fan, the fan belt is slack.

　　In addition, we should also pay attention to check whether the air filter is clogged, whether the oil is missing, etc..

　　When looking at the hydraulic system, we should generally look at the following aspects: see whether the size of the arm is shaking, whether there is rupture; see whether there is a rupture of the cylinder leakage phenomenon; see whether there is contamination of the hydraulic oil phenomenon; see whether there is a broken pipe, oil leakage phenomenon.

　　Look at the walking system, look at the walking system mainly to see whether there is a running phenomenon, if there is a running phenomenon need to check the following aspects: look at the support wheel whether there is wear and tear; to see whether there is a loosening of the bolts; look at the tracks, sprockets, guide wheel whether wear and tear is serious; look at the chassis whether there is a crack phenomenon.

　　We also need to check the hydraulic pump and travel motor to see if they have any problems.

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