在常壓常溫下升降貨梯http://www.fnae.cn/液壓油中含有容積比為6～8%的空氣，當壓力降低時空氣會從油中游離出來，氣泡破裂使液壓元件“氣蝕”，產生噪聲。大量的空氣進入油中將使“氣蝕”現象加劇，液壓油壓縮性增大，工作不穩定，降低工作效率，執行元件出現工作“爬行”等不良后果。另外空氣還會使液壓油氧化，加速油的變質。

1、升降貨梯維修和換油后要按規定排除系統中的空氣，才能正常作業。
After the cargo lifter maintenance and oil changes according to the provisions to exclude air from the system in order to work properly.

2、升降貨梯液壓油泵的吸油管口不得露出油面，吸油管路必須密封良好。
Cargo lifter hydraulic pump suction nozzle must not be exposed oil surface, the suction line must be sealed well.

3、升降貨梯http://www.fnae.cn/油泵驅動軸的密封應良好，要注意更換該處油封時應使用正品油封，不能用“單唇”油封代替，因為“單唇”油封只能單向封油，不具備封氣的功能。液壓油泵出現連續“氣蝕”噪聲、油箱油位自動升高等故障，經檢查升降貨梯液壓油泵修理過程，發現即為液壓油泵驅動軸的油封誤用“單唇”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.