冬季天气寒冷,冷却水易结冰,润滑油粘度增大,机车起动困难,行车安全性差。因此,要使拖拉机在冬季使用好,过好冬,应把好“五关”: 一、用油关拖拉机使用的柴油,一般分为:+10、0、10、20、30号,号数是表示凝固点的温度。如+10号凝固点是10℃;10号的凝固点是-10℃,以此类推。柴油中含有蜡质,一般在高于凝固点7℃左右,就有蜡 Cold weather in winter, easy to freeze the cooling water, oil viscosity increases, locomotive start difficult, poor driving safety. Therefore, to make good use of the tractor in winter, good winter, should be good “five off ”: First, the oil off the tractor used diesel, generally divided into: +10,0,10,20,30, Number is the freezing point temperature. Such as +10 freezing point is 10 ℃; 10 freezing point is -10 ℃, and so on. Diesel contains wax, usually above the freezing point of about 7 ℃, there is wax