The engine failure of automatic concrete mixer is a common situation, so how to judge whether the engine needs to be overhauled?

1，气缸内径过度磨损。圆度偏差为0.04-0.06mm，圆柱度偏差为0.08-0.12mm（通常，测量圆柱体的下半部分和上半部分之间的差值）。对于多缸发动机，圆度和圆柱度偏差基于具有大磨损的一个汽缸。

1. The inner diameter of the cylinder is excessively worn. The roundness deviation is 0.04-0.06mm, and the cylindricity deviation is 0.08-0.12mm (generally, the difference between the lower half and the upper half of the cylinder is measured). For multi cylinder engines, roundness and cylindricity deviations are based on one cylinder with large wear.

2，油量显着增加，油压下降，排气管发出黑色和蓝色烟雾。

2. The oil volume increases significantly, the oil pressure decreases, and the exhaust pipe emits black and blue smoke.

3，混凝土全自动搅拌车的功率大幅下降。其高马力仅为功率的60％左右（不包括高海拔引起的功率下降），其气缸压力低于标准压力的65％。

3. The power of the full-automatic concrete mixer is greatly reduced. Its high horsepower is only about 60% of the rated power (excluding the power drop caused by high altitude), and its cylinder pressure is less than 65% of the standard pressure.

4，曲轴磨损过多，曲轴磨损后曲轴的圆度和圆柱度偏差超过大使用限，或圆度和锥度限 制在0.10mm。

4. The crankshaft is worn too much, and the deviation of roundness and cylindricity of the worn crankshaft exceeds the service limit, or the roundness and taper are limited to 0.10 mm.

5，当发动机启动或停止时，如果温度为50^-60°C，水温将无法平稳启动。

5. When the engine starts or stops, if the temperature is 50 ^ - 60 ℃ ° C. The water temperature will not start smoothly.

6，发动机异常或操作不正常。当发动机在高温状态下运转时，气缸内有噪音（活塞爆震），主轴承或连杆轴承发出严重的振动或敲击声。

6. Engine abnormal or abnormal operation. When the engine is running at high temperature, there is noise in the cylinder (piston knock), and the main bearing or connecting rod bearing makes serious vibration or knocking sound.

混凝土全自动搅拌车的售后维护工作

After sale maintenance of automatic concrete mixer

一、合理确定保护期：自拌混凝土车保护周期是指汽车保护的距离或时间。在实际应用过程中，车主应参考汽车制造商介绍的保护周期，联系汽车自身的技术和应用前提，并对保护周期进行适当调整。一般而言，新车在优越的道路条件下使用，不需要过于频繁地保护它们，并且制造商的常规保护期可以用作上限。如果汽车技能差，或前提不好，应适当缩短保护周期。

1、 Reasonable determination of protection period: the protection period of self mixing concrete truck refers to the distance or time of vehicle protection. In the process of practical application, the vehicle owner should refer to the protection cycle introduced by the automobile manufacturer, contact the vehicle's own technology and application premise, and adjust the protection cycle appropriately. Generally speaking, new cars are used in superior road conditions, they do not need to be protected too frequently, and the manufacturer's regular protection period can be used as the upper limit. If the vehicle skill is poor or the premise is not good, the protection cycle should be appropriately shortened.

二，测试的全 面应用：自给式搅拌机制造商的自 由检测运动往往有利于车主的长度，车主可以应用这些测试活动进行特定的体检，识别并消 除一些潜力实时出现问题，节约需求可能会在未来带来高昂的维护和保护成本。

2、 Comprehensive application of testing: the free testing movement of self-contained mixer manufacturers is often conducive to the length of car owners. Car owners can use these testing activities to conduct specific physical examination, identify and eliminate some potential real-time problems, and save demand, which may bring high maintenance and protection costs in the future.

三，修 复尽可能坍塌的部件：许多自行式搅拌机的拥有者都有这种感觉，就像坍塌后汽车部件的维护不可阻挡一样，因此车辆过早进入维修期。这种情况的原因是要了解修理工的装配技巧和质量。因此，它是一种防碰撞修 复部件，它使用各种的技能保护设备和技术来保护自拌混凝土车免于拆卸，防止损坏汽车部件和部件，提高保护质量，从而降低总维护成本。

3、 Repair parts that collapse as much as possible: many owners of self-propelled mixers have this feeling, just like the unstoppable maintenance of automobile parts after collapse, so the vehicle enters the repair period too early. The reason for this situation is to understand the assembly skills and quality of the repairman first. Therefore, it is a kind of anti-collision repair parts, it uses a variety of advanced technical protection equipment and technology to protect the self mixing concrete truck from disassembly, prevent damage to automobile parts and components, improve the quality of protection, so as to reduce the total maintenance cost.

混凝土全自动搅拌车发动机大修问题和售后维护工作介绍就是这样了，希望对你有帮助。

This is the introduction of the overhaul and after-sales maintenance of the engine of the automatic concrete mixer. I hope it can help you.