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通化石油化工机械厂生产的ＸＪ－５０Ｃ型车载式修井机在全国各大油田应用较广，这种修井机采用奔驰汽车作为载车，取力装置ＺＦ－ＰＴＯ直接从汽车取力作为修井机的动力。因此作为动力联接枢纽的ＺＦ－ＰＴＯ动力输出装置的正常运转至关重要。而实际使用中该装置故障频繁。针对这一情况，作者对该装置的结构原理进行了研究，并分析总结了使用中出现的问题，进行了大量的修复实践工作，得出了一套较为完整的使用维护技术和修复经验。
XJ-50C vehicle-mounted workover machine produced by Tonghua Petrochemical Machinery Factory is widely used in the major oil fields across the country. The workover rig adopts Mercedes-Benz as the vehicle and the power take-off ZF-PTO takes the power directly from the vehicle as a repair Well machine power. Therefore, the normal operation of the ZF-PTO power output device as a power connection hub is of crucial importance. The actual use of the device failure frequently. In view of this situation, the author studied the structure and principle of the device, analyzed and summarized the problems in use, carried out a large number of repair practices, and obtained a complete set of using and maintaining techniques and repairing experiences.