机车在夏季作业中 ,由于外界气温高以及冷却水循环不良或不足、未清理水垢、高负荷作业等原因 ,易造成发动机水箱“开锅”。从而使发动机温度过高 ,功率下降 ;同时 ,相互配合的零部件膨胀增大 ,配合间隙改变 ,造成零部件磨损或损坏 ;机油变稀、粘度下降、变质 ,润滑性能变差 ,? Locomotives in the summer operations, due to high outside temperatures and poor cooling water circulation or inadequate, uncaarded scale, high load operation and other reasons, easy to cause the engine water tank “boil.” So that the engine temperature is too high, the power down; the same time, the expansion of the cooperation of parts increases, with the gap changes, resulting in wear or damage parts; oil thinning, viscosity decline, deterioration, deterioration of lubrication performance,