我公司的DLQ2 5型轮胎起重机支腿液压缸普遍存在导向套碎裂和支腿液压缸严重漏油的现象 ,导致支腿下沉 ,使吊机失去平衡 ,产生机损等事故。主要问题及其原因是 :　　 ( 1)故障率高 ,支腿液压缸导向套与缸体间常漏油 ,更换O形圈后 ,问题仍未解决。在原设计中 ,为方便拆卸 ,挡圈 My company’s DLQ2 5 Tire Crane hydraulic cylinder leg widely prevalence of cracked sleeve and leg cylinder serious oil leakage phenomenon, leading to legs sinking, so that the crane out of balance, resulting in machine damage and other accidents. The main problems and their causes are as follows: (1) The failure rate is high, the oil leakage often occurs between the guide cylinder of the leg cylinder and the cylinder body, and the problem has not been solved after replacing the O-ring. In the original design, to facilitate the demolition, retaining ring