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一4115型柴油机工作中突然熄火,经查是烧瓦所致,但曲轴并无损伤。换用新瓦后,发动机试车时根本建立不起油压。进一步检查表明,机油泵工作正常,拿掉机油滤清器后,摇转曲轴,机油从机体油道向外流。于是,我们怀疑是调压阀关闭不严。当拆下调压阀钢球并用圆木堵住钢球对应的油孔时,起动发动机后很快建立了油压。毛病就出在调压阀钢球上。经检查调压阀钢球,发现其上已磨出环状台阶,尤其
A sudden 4115 diesel engine flameout, the investigation is caused by burning tile, but the crankshaft is not damaged. After the switch to new watts, the engine can not afford to test the hydraulic pressure. Further examination showed that the oil pump is working properly, and after removing the oil filter, the crankshaft is cranked, and the oil flows outward from the body oil passage. So, we suspect that the pressure regulator is not tight. When removing the regulator valve ball and the ball with a round hole to block the oil, start the engine quickly established after the oil pressure. Fault on the pressure regulating valve ball. After checking the pressure regulating valve steel ball, it was found that it has worn out ring-shaped steps, especially