混凝土運輸攪拌車發動機大修的條件！
混凝土攪拌運輸車是一種工作強度大，可靠性要求高的工程機械，要保證其高能的工作狀態，日常保養尤為重要。但是在長時間使用過后，發動機可能會損壞，那什么條件下就應該對發動機大修呢？下面就為您詳細介紹一下。
Concrete mixer truck is a kind of construction machinery with high working strength and high reliability requirements. In order to ensure its high-energy working state, daily maintenance is particularly important. But after a long time of use, the engine may be damaged. Under what conditions should the engine be overhauled? Here is a detailed introduction for you.
一、氣缸內徑磨損過甚，其圓度偏差為0.04-0.06毫米，圓柱度偏差為0.08-0.12毫米(一般以缸簡下半部與上半部測量比差)。對于多缸的發動機，圓度和圓柱度偏差以其中磨損較大的一個氣缸為依據。
1、 The inner diameter of the cylinder is worn too much, the roundness deviation is 0.04-0.06mm, and the cylindricity deviation is 0.08-0.12mm (generally, the ratio difference between the lower half and the upper half of the cylinder is measured). For the multi cylinder engine, the roundness and cylindricity deviation is based on the cylinder with larger wear.
二、機油量顯著增加，機油壓力下降，排氣管冒黑藍色濃煙。
2、 The amount of engine oil increases significantly, the pressure of engine oil decreases, and the exhaust pipe emits black and blue smoke.
三、混凝土運輸攪拌車功率顯著下降，其髦大馬力只有額定功率的60%左右(不包括海拔高而導致的功率下降)，其氣缸壓力低于標準壓力的65%以下。
3、 The power of concrete mixer truck decreases significantly, its high power is only about 60% of the rated power (excluding the power decrease caused by high altitude), and its cylinder pressure is less than 65% of the standard pressure.
四、曲軸磨損過多，曲軸各軸頸磨損后的圓度和圓柱度偏差超過使用限度，或失圓、錐度均按0.10毫米為限。五、發動機起動時或停車后，水溫在50^-60℃的情況下不能順利起動。
4、 If the crankshaft is worn too much, the roundness and cylindricity deviation of each journal of the crankshaft after wear exceeds the use limit, or the out of roundness and taper are limited to 0.10 mm. 5、 The engine can not start smoothly when the water temperature is between 50 ^ - 60 ℃ when it is started or stopped.
六、發動機異響或運轉不正常，發動機運轉在熱狀態時氣缸內出現雜聲(活塞敲缸)，主軸承或連桿軸承出現嚴重的振響或敲擊響聲。
6、 The engine makes abnormal noise or runs abnormally. When the engine is running in hot state, there is noise in the cylinder (piston knocking), and the main bearing or connecting rod bearing has serious vibration or knocking noise.
以上就是混凝土運輸攪拌車發動機大修的條件，另外在有結冰可能的環境中使用，供水系統必 須排空存水，防止管路凍裂；經常檢查系統的密封性，關鍵部位涂抹管路用密封膠。
The above are the conditions for the overhaul of the engine of the concrete mixer. In addition, when it is used in the environment with the possibility of freezing, the water supply system must be emptied to prevent the pipeline from frost cracking; the sealing of the system should be checked frequently, and the sealant should be applied to the key parts of the pipeline.
