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发动机温度在80℃～90℃之间时,才会产生最大功率且能耗比最大。因此,在启动前,如果周围气温低于8℃,必须加1～2次热水,直到能从各放水阀流出热水,水泵壳体暖热为止;注入曲轴箱的润滑油需加热至80℃～100℃,才允许启动。当缸体在冷凉状态下,不能用延长预热塞预热时间强行启动,也不能用其他车辆拖拉启动。当发动机启动后,如果水温不到70℃,不能投入作业。发动机在低温下启动或工作有以下危害:
When the engine temperature is between 80 ℃ ~ 90 ℃, it will produce the maximum power and the maximum energy consumption ratio. Therefore, before the start, if the ambient temperature is below 8 ℃, you must add 1 or 2 times hot water until it can flow out from the hot water valve, the pump housing warm and hot; injected into the crankcase oil to be heated to 80 ℃ ~ 100 ℃, only allowed to start. When the cylinder is in a cool state, it can not be started by prolonging the warm-up time of the glow plug, nor can it be started by dragging by other vehicles. When the engine starts, if the water temperature is less than 70 ℃, can not put into operation. Engine start or work at low temperatures have the following hazards: