升降货梯作为货物垂直升降的运输设备，现如今已经普及到社会生活的各个角落，使用越来越广泛，不管是建筑，土木工程，还是日常生活中安装和维修都离不开货梯的使用。 液压系统是升降货梯机械重要组成部分，液压油进入液压系统运行之时，清洁就是首要问题。应阻止脏物和其它杂质进入系统。正如你已知道的，微小粒子会擦伤阀门，卡住泵，阻塞孔口，从而造成耗费财力的修理。 维护好液压系统是关系到升降货梯机械的安全使用和长久使用的关键，如何正确掌握液压系统维护的方法呢？ 如何保持液压系统清洁？
一、 液压升降货梯要保持液压油清洁
The hydraulic elevator should keep the hydraulic oil clean
将油储存在清洁位置，换油或加油时必须小心谨慎。只能使用配备细格滤网的清洁漏斗将油从容器倒入油箱。当然，你使用的油必须应该是设备生产商推荐的类型。
Store oil in a clean place, and be careful when changing oil or refueling. The oil can only be poured from the container into the tank using a clean funnel equipped with a fine mesh filter. Of course, the oil you use must be the type recommended by the device manufacturer.
二、货梯要保持系统清洁
The elevator should keep the system clean
定期更换油和过滤器。好的液压油含有多种添加剂，这些添加剂可防止油变质或堵塞系统零件。但是，这些添加剂在一段时间以后会丧失效用。因此油应该定期更换，确保添加剂发挥作用。过滤器只能从油中吸收有限数量的污垢粒子和其它杂质。按建议的周期更换过滤器，以便保持系统清洁。
Change oil and filter regularly. Good hydraulic oil contains a variety of additives that prevent oil deterioration or block system parts. However, these additives will be ineffective over time. The oil should be replaced periodically to ensure that the additives are used. Filters can only absorb a limited amount of dirt and other impurities from oil. Replace the filter with recommended cycles to keep the system clean.
三、货梯要定期放油和重新加油
Third, the ladder should be oil and refuel regularly
定期放出油箱中的水和沉淀物，对于清除油中杂质十分重要，但是定期放空整个液压系统也十分重要。这是完全清除系统杂质、被氧化的液压油和其它有害物质的唯一可靠的方法。然后，应该将推荐的清洁的液压油重新加入系统之中。
Regularly releasing water and sediment in the tank is important for removing impurities in the oil, but it is also important to regularly empty the entire hydraulic system. This is the only reliable way to completely remove the impurities of the system, the hydraulic oil and other harmful substances that are oxidized. The recommended clean hydraulic oil should then be added to the system.
如果导轨升降货梯的液压油已完全污染，特别当泵受到损坏时，必须清洗油箱中的油。通过油清洗装置使油流动，直至油污染指标显示，油已处于令人满意的状态。
If the hydraulic oil of the guide elevator is completely polluted, especially when the pump is damaged, the oil in the tank must be cleaned. The oil is flowing through the oil cleaning device until the oil pollution indicator shows that the oil is in satisfactory condition.
