一台日本神钢7150型150t履带起重机,已使用了15年,使用中出现主钩只能下降不能上升的故障,而力矩限制器并无过卷报警故障代码显示,因此可排除该装置故障。考虑到该机常在沿海一带作业,潮湿的气候环境易导致设备电路部分接线口腐蚀,加之近期该机又连续出现烧保险的现象,于是怀疑故障原因可能在电路部分。 A Kobelco 7150 150t crawler crane has been in use for 15 years. During use, the main hook can only decline and fail to rise. The torque limiter does not display the over-curb alarm fault code, so it can be ruled out. Taking into account the aircraft often operate in the coastal areas, the humid climate and environment easily lead to corrosion of the wiring part of the equipment circuit, combined with the recent continuous burning of the aircraft and the phenomenon of the machine, so I suspect the cause of the malfunction may be part of the circuit.