工程机械工作的场所往往是环境较为恶劣的施工现场，经使用一段时间的工程机械，应对其进行必要的维护和保养，以保持设备良好的技术状态。在设备的使用说明书中，一般对于各个润滑部位均有加注润滑油的详细要求，密封圈磨损后需及时更换。但在实际使用状况的调查中发现，有些 Construction machinery work place is often a harsh environment of the construction site, the use of construction machinery for some time, should be the necessary maintenance and repair to maintain a good technical condition of the equipment. In the manual of the equipment, generally for each lubrication site have the detailed requirements of filling oil, sealing ring wear after the need to be replaced. However, the actual use of the survey found that some