我站一台东方红—75拖拉机,多年未更换喷油器总成。工作中发现发动机转速不稳,马力下降,排气管冒黑焖,通过断缸试验发现,在松开第四缸高压油管螺母时,冒出泡沫状的柴油,且发动机声音不变,但排气管黑烟消失。卸下该缸喷油器检查,针阀已卡死在开启位置。开始我们认为是燃油不干净和使用时间过长、积炭增多而致。经清洗油路并换用干净燃油和新偶件,谁知工作不到1小时,上述故障现象又出现。 I am a station East Red -75 tractor, injector replacement for many years without replacement. Found in the work of the engine speed instability, horsepower decline, the exhaust pipe run black stew, broken cylinder test found that in the release of the fourth cylinder high-pressure tubing nut, emerge foamy diesel, and the engine sound the same, but the row Tracheal black smoke disappears. Remove the cylinder injector check, the needle has been stuck in the open position. At first we think it is fuel is not clean and the use of time is too long, caused by coke deposition. After cleaning the oil circuit and switch to clean fuel and new parts, who knows less than 1 hour of work, the above symptoms appear again.