东风_4型机车在日常运用中时常发生冷却水系统漏水故障。对于一般水管路的漏泄,查找较为方便,容易判定故障部位。可是,对于有些部位的漏泄(如高低温水泵、缸套、缸盖等)则很难作到准确判断。这是因为有的部位在停机时不漏泄,而在柴油机运转时漏泄。在这种条件下进行检查和判断就比较困难。有时 Dongfeng _4 locomotive in the routine use of cooling water system often leaks fault. For the general leakage of water pipes, find more convenient, easy to determine the fault location. However, some parts of the leak (such as high and low temperature pumps, cylinder liners, cylinder heads, etc.) is difficult to make accurate judgments. This is because some parts do not leak during shutdown and leak during operation of the diesel engine. Under such conditions, inspection and judgment are more difficult. sometimes