Application of hydraulic excavator system mainly pilot control hydraulic system, hydraulic system, hydraulic system, hydraulic system, it has the advantages of compact structure, flexible operation, stable operation, convenient operation, the hydraulic system is a hydraulic oil as power transmission medium, because the internal components wear after leakage, accompanied by overheating, inability to work breakdown.
Failure of hydraulic transmission is sudden and concealment, but also relates to the components more, for troubleshooting is difficult, so the maintenance of the hydraulic system, the foundation must understand its working principle and fault analysis of the right to ensure maintenance quality。
The failure of the hydraulic system is mainly in two aspects: the slow lifting of the large arm and the slow and feeble rotation。 The main cause of the two failures is that the oil pressure is low, and the main cause of the low pressure is the clogging and leakage。 The smooth and sealed oil well is a guarantee for the normal operation of the system。 Blockage and leakage are the most common hydraulic transmission failures。 Therefore, checking hydraulic transmission failures generally starts with hydraulic oil circuits。
In view of the surface phenomenon, the long arm excavator is mostly caused by the failure, damage, extrusion or sealing surface of the seal. The main reasons are: oil contamination, improper sealing surface roughness, unqualified sealing grooves, loosening of pipe joints, enlargement of mating parts, excessive oil temperature, deterioration of sealing rings or improper assembly. Leakage is divided into internal leakage and external leakage, usually due to internal leakage.
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