水平液压缸是汽车起重机进行吊载作业前、后完成支腿水平伸缩的执行元件，在使用中因其承受载荷不大且不经常动作，故出现漏油现象时不易被引起重视。１．漏油部位的确定液压缸的外泄漏一般有３种情况：一是沿活塞杆与导向套内密封间的漏油；二是沿缸筒与导向套外密封间的漏油 The horizontal hydraulic cylinder is the executive component that the horizontal and vertical expansion and contraction of the outriggers are completed before and after the crane operation of the truck. It is not easy to be paid attention to because of its small load and infrequent movements during use. 1. Leakage site to determine the external leakage of the cylinder are generally three kinds of situations: First, along the piston rod and guide sleeve seal between the oil leakage; Second, along the outer sleeve and the guide sleeve between the oil seal leakage