挖掘机转向迟缓故障的排除方法（Troubleshooting method for steering slow fault of excavator）.docVIP

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挖掘机转向迟缓故障的排除方法（Troubleshooting method for steering slow fault of excavator）.doc

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挖掘机转向迟缓故障的排除方法（Troubleshooting method for steering slow fault of excavator）

挖掘机转向迟缓故障的排除方法（Troubleshooting method for steering slow fault of excavator） Troubleshooting method for steering slow fault of excavator 2009-3-23 A WY4-60 excavator often causes the slow steering of the front wheel to malfunction during cornering. According to the working principle of the steering system, it can be determined that the failure is caused by the decrease of the volumetric efficiency of the hydraulic steering system and the low system pressure. The reasons are mainly caused by serious leakage and leakage in the hydraulic system. In general, the following methods can be used for examination and removal. (1) check whether the hydraulic steering system is leaking outside. The main symptoms of the external oil leakage are: the hydraulic oil loss is greater, the system pressure drops, the steering cylinder and motor movement is not smooth, resulting in rotation, slow, unable, and even unable to turn. The main reasons for the external leakage include improper matching of tubing fittings, bad sealing and pipeline rupture, improper sealing, wear, aging or damage, and excessive oil temperature, thus increasing leakage. When the external oil leakage is found, the maintenance should be carried out in time. (2) check the hydraulic oil The quality and quantity of hydraulic oil will directly affect the working state of the steering system. The hydraulic oil is too small, will turn to the slow movement of the hydraulic pump machine due to insufficient fuel, it should be added to the specified level of hydraulic oil; when the hydraulic oil tank is not clean or a foreign body, impurities into the hydraulic system will cause damage to the seal or the components with side damage, the internal leakage increases thus, by turning slowly. To this end, the hydraulic oil must be carefully examined. If the oil impurities, should promptly replace the hydraulic oil, and cleaning the entire hydraulic system. (3) check whether the hydraulic steering system has entered the air Even a