Do not work under a machine that is jacked up by the boom and arm only.To work under the machine,always put wooden blocks under the crawlers.
To detach any of the cylinder system parts,lower the bucket on the ground,stop the engine,jiggle the control levers to release the pressure in the cylinder system.If this is not done,hydraulic oil,which is heated to high temperature,may gush out during detaching procedure,causing scalding.
參考答案:不得在仅用起重悬臂支撑的机器下面作业。若要在此机器下面作业，必须在履带下面垫木支撑块。
拆卸汽缸零件时，将缸体放在地上，关闭引擎，轻摇控制杆释放汽缸内部压力，否则，拆解过程中高温液压油可能会喷溅出来造成烫伤。