对立式拉床CS-5061的动力部件-径向柱塞泵CJT13-300BEA的工作原理、结构进行了说明。并对立式拉床CS-5061的工进、快进速度慢、液压电机启动后偏心机构不回零,返回速度慢的故障现象的原因进行了分析、诊断,得出阀体与阀芯的卡死、间隙增大、滚动轴承的损坏影响了机床的可靠运行,在此基础上,对故障设备进行修复。总结了柱塞泵修复的原则和步骤。 On the vertical broaching machine CS-5061 power components - radial piston pump CJT13-300BEA the working principle and structure are described. And the vertical broaching machine CS-5061’s work, fast forward speed is slow, the hydraulic motor starts after the eccentric body does not return to zero, return to the cause of the phenomenon of slow failure were analyzed and diagnosed, and the valve body Stuck, the gap increases, the loss of rolling bearings affect the reliable operation of machine tools, on this basis, the repair of faulty equipment. Summarized the principles and steps of piston pump repair.