在常压常温下升降货梯http://m.iyunsun.com/液压油中含有容积比为6～8%的空气，当压力降低时空气会从油中游离出来，气泡破裂使液压元件“气蚀”，产生噪声。大量的空气进入油中将使“气蚀”现象加剧，液压油压缩性增大，工作不稳定，降低工作效率，执行元件出现工作“爬行”等不良后果。另外空气还会使液压油氧化，加速油的变质。

1、升降货梯维修和换油后要按规定排除系统中的空气，才能正常作业。
After the cargo lifter maintenance and oil changes according to the provisions to exclude air from the system in order to work properly.

2、升降货梯液压油泵的吸油管口不得露出油面，吸油管路必须密封良好。
Cargo lifter hydraulic pump suction nozzle must not be exposed oil surface, the suction line must be sealed well.

3、升降货梯http://m.iyunsun.com/油泵驱动轴的密封应良好，要注意更换该处油封时应使用正品油封，不能用“单唇”油封代替，因为“单唇”油封只能单向封油，不具备封气的功能。液压油泵出现连续“气蚀”噪声、油箱油位自动升高等故障，经检查升降货梯液压油泵修理过程，发现即为液压油泵驱动轴的油封误用“单唇”油封所致。
Cargo lifter oil pump drive shaft seal should be good, pay attention to where the seals should be used to replace the authentic seal, can not use the "single lip" seal in place, because the "single lip" seal oil seal in only one direction, do not have a sealing function . Hydraulic pump consecutive "cavitation" noise, such as elevated oil tank automatic fault, the check cargo lifter hydraulic pump repair process, found hydraulic pump drive shaft seal is misuse "single lip" seal due.