本文对资阳内燃机车工厂生产的12V180ZJ型柴油机的喷油泵上体裂,凸轮轴、滚轮体定位螺钉、出油阀弹簧等零件经常折断,凸轮和滚轮偏磨、剥离,齿条移动时阻力不稳定,各分泵油量不均匀等问题产生的原因进行了分析并提出改进措施。通过这些改进,不仅提高了喷油泵的可靠性,而且对柴油机和机车的可靠性及性能稳定性均有相应的提高。 This article on Ziyang diesel locomotive factory 12V180ZJ diesel engine injection pump body crack, camshaft, roller body positioning screws, valve springs and other parts often broken, cam and roller partial wear, peeling, the resistance of the rack movement instability , The uneven distribution of the amount of sub-pump and other issues were analyzed and proposed improvements. Through these improvements, not only improve the fuel pump reliability, but also on the reliability of diesel engines and locomotives and performance stability has been increased accordingly.