A．按上表维修及更换各部件时必须确定：压缩机系统内的压力都已释放，与其它压力源已隔开，主电路上的开关已经断开，且已做好不准合闸的安全标识。

A. When repairing and replacing the components according to the above table, it must be determined that the pressure in the compressor system has been released, separated from other pressure sources, the switch on the main circuit has been disconnected, and the safety mark of no closing has been made.

B．压缩机冷却润滑油的更换时间取决于使用环境、湿度、尘埃和空气中是否有酸碱性气体。a.使用普通冷却油的机器：新压缩机第一次运行500小时后要更换新油，以后按正常换油周期每2500小时或每年更换一次。b.使用超级冷却油的机器：每8000小时或每两年更换一次。非连续运转的空气压缩机应适时换油。封存的压缩机应每2年换油一次。

B. The replacement time of compressor cooling lubricant depends on the use environment, humidity, dust and whether there is acid-base gas in the air. A. Machines using ordinary cooling oil: after the first 500 hours of operation of the new compressor, the new oil should be replaced, and then every 2500 hours or every year according to the normal oil change cycle. B. Machines using super cooling oil: replaced every 8,000 hours or every two years. Discontinuous operation of air compressors should be timely oil change. Sealed compressors should be replaced every two years.

C．油过滤器在第一次开机在使用500小时后必须更换，第二次在使用1000小时后更换，以后则按正常时间每2500小时更换。

C. Oil filters must be replaced after 500 hours of first start-up, 1000 hours of second use, and every 2500 hours of normal time.