轮胎式龙门起重机经过10多年使用，其吊具防摇系统油缸头频繁脱落，影响生产。经研究，找出了故障原因。采用增加耳板的办法加以改进，取得了良好的效果。%After more than 10 year＇s usage, the oil cylinder head of spread＇s swing-against system of RTG drops frequently; which influences production. The trouble reason has been found out by research. Then a method of adding ear board has been adopted so as to improve it, which has got fine effect.
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