胀缸是液压机械中时有出现的故障现象，它会导致机器工作失常，必须及时加以修复。因胀缸后的液压缸中间大、两头小，修复很困难，修理成本高，故危害性较大。本文对胀缸原因进行了分析，并提供了行之有效的避免胀缸的方法。WYL６０型轮式挖掘机，第一次发现支腿撑不起来时，换 Expansion cylinder is a hydraulic machinery in the phenomenon of failure, it will lead to malfunction of the machine, you must promptly be repaired. Due to expansion of the cylinder after the middle of the hydraulic cylinder, two small, very difficult to repair, repair costs are high, it is more harmful. This article analyzes the reasons for the expansion cylinder and provides an effective way to avoid the expansion cylinder. WYL60 wheeled excavator, for the first time found the leg can not stand up, change