(1)故障现象为发动机起动后,机油压力逐渐下降,甚至降到零。故障原因有两个,一是由于限压阀或回油阀磨损,密封不严而造成漏油,或者弹簧弹力减弱,调整螺钉松动导致漏油;二是曲轴主轴瓦、连杆轴瓦磨损严重,配合间隙过大,当机油温度升高后,粘度下降,机油便从间隙处泄漏,造成机油压力逐渐下降。 (1) Fault phenomenon After the engine starts, the oil pressure gradually decreased, or even down to zero. There are two reasons for the failure, one is due to pressure-limiting valve or return valve wear and tear, tightness and leakage caused by leakage, or spring stretch weakened, adjusting screw loose lead to oil leakage; Second crankshaft main bearing, connecting rod bearing wear serious, With the gap is too large, when the oil temperature increases, the viscosity drops, the oil leaks from the gap, resulting in a gradual decline in oil pressure.