水温过高是工程机械用水冷式柴油机最常见的故障之一。因缸套、活塞摩擦副材料热膨胀系数不同,高温会使间隙变小,润滑状况恶化,久之造成拉缸、活塞环卡死等故障。此外,水温过高会使润滑油黏度下降,破坏油膜,降低润滑效果和动力性能。因此,柴油机水温必须控制在允许值。导致柴油机水温过高的原因主要有9个方面。(1)冷却液选用不当或水量不足。工 Water temperature is too high water-cooled diesel engine construction machinery one of the most common faults. Due to the cylinder liner, piston friction material of different thermal expansion coefficient, high temperature will make the gap smaller, deterioration of lubrication conditions, for a long time caused pull cylinder, piston ring stuck and other failures. In addition, the water temperature is too high will make the viscosity of lubricating oil, oil film damage, reducing lubrication and dynamic performance. Therefore, the diesel engine water temperature must be controlled at the allowable value. The main reason that causes the water temperature of diesel engine is high is 9 aspects. (1) improper use of coolant or insufficient water. work