1.防冻关每年冬季,冻坏拖拉机的事故时有发生。拖拉机冷却系统里的水到0℃以下就要结冰并体积膨胀,把散热器、水箱、水套、气缸盖胀裂。其原因:一是入冬后,天气虽冷,但水还不到结冰的温度,因此停车后往往忽略放掉冷却水。此时气候如果骤变,夜间降温到0℃以下,冷却水就会结冻而 1. Antifreeze off winter every year, frozen tractor accident occurred from time to time. Tractor cooling system to the water below 0 ℃ will freeze and volume expansion, the radiator, water tank, water jacket, cylinder head burst. The reason: First, after the winter, the weather is cold, but the water is not frozen to the temperature, it is often neglected to let go after the cooling water cooling. At this time if the climate changes suddenly, at night cooling to below 0 ℃, the cooling water will freeze