1.圆柱体的内径磨损，圆度偏差为0.04至0.06 mm，圆柱度偏差为0.08至0.12 mm（通常圆柱体下半部分与圆柱体上半部分之间的差为测量）..对于多缸发动机，圆度和圆柱度之间的偏差基于磨损最高的气缸。
For multi cylinder engine, the deviation between roundness and cylindricity is based on the cylinder with the highest wear.
2. The amount of oil increases significantly, the oil pressure decreases, and the exhaust pipe emits dark black and blue smoke.
3. The output of concrete mixer truck decreased greatly. High horsepower is about 60% of rated output (excluding power reduction due to high altitude), and cylinder pressure is less than 65% of standard pressure
4. The crankshaft is worn too much, and the deviation between the roundness and cylindricity of the worn crankshaft journal exceeds the maximum limit, or the roundness and taper are limited to 0.10 mm.
5. When the engine starts or stops, if the water temperature is 50-60 ° C. The water temperature will not start smoothly.
6. Engine noise or abnormal operation when the engine is running at high temperature, cylinder noise (piston knock), violent vibration or knock noise of main bearing or connecting rod bearing.
The above are the conditions for overhauling the self loading multifunctional mixer. If you understand these conditions again, you will know that the engine needs to be repaired.