要注意液压升降机气蚀和溢流噪声，液压升降机作业中要时刻注意液压泵和溢流阀的声音，如果液压泵出现“气蚀”噪声，经排气后不能消除，应查明原因排除故障后才能使用。如果液压升降机某执行元件在没有负荷时动作缓慢，并伴有溢流阀溢流声响，应立即停机检修。操作手要保持稳定，因为每台设备操纵系统的自由间隙都有一定差异，连接部位的磨损程度不同因而其间隙也不同，发动机及液压系统出力的大小也不尽相同。
Attention should be paid to the hydraulic lift and overflow cavitation noise, hydraulic lift operation should always pay attention to the hydraulic pump and overflow valve sound, if the hydraulic pump "cavitation" noise, the exhaust can not be eliminated, should be identified to cause after troubleshooting. If a hydraulic lift actuator does not move slowly when there is no load, accompanied by overflow valve overflow sound, should immediately stop maintenance. The operator should remain stable, because the free clearance per device control system there are some differences in the degree of wear, the connecting parts of the different so the gap is different, the size of the output of the engine and hydraulic system are not the same. 

只有使用液压升降机的操作手认真摸索，修正自己的操纵动作以适应设备的个性，经过长期作业后，才能养成符合设备个性的良好操作习惯。一般机械行业坚持定人定机制度，这也是因素之一。
Only the use of hydraulic lift operator carefully explore, modify their manipulation to adapt to the personality of the device, after long-term operations, in order to develop a good personality in line with the operating habits of

equipment. General machinery industry adhere to the fixed machine system, which is one of the factors.