Concrete mixer as a large construction equipment, regular high-intensity work, so sometimes there will be a variety of problems, need to be repaired. So when will the concrete mixer engine be overhauled?
Cylinder inner diameter wear is too large, the roundness deviation is 0.04-0.06mm, cylindricity deviation is 0.08-0.12mm （generally measured by the ratio of the difference between the lower part and the upper part of the cylinder）。 For multi-cylinder engines, the difference in roundness and cylindricity is based on the significant increase in cylinder oil volume, decrease in oil pressure, and exhaust pipe emission of black and blue smoke
The power of concrete mixer truck is significantly reduced, its peak high horsepower is only about 60% of the rated power （excluding the power drop caused by high altitude）， the cylinder pressure is less than 65% of the standard pressure, and the crankshaft is excessively worn. After the crankshaft is worn, the roundness and cylindricity difference of each journal exceeds the service limit, or the roundness and taper are limited to 0.10mm. When the water temperature is 50^-60℃， the engine cannot start smoothly when starting or stopping
Concrete mixer truck manufacturers think that the engine is abnormal noise or abnormal operation of the time to carry out overhaul. When the engine is running in hot state, the cylinder （piston knocking cylinder） has noise, and the main bearing or connecting rod bearing has serious vibration or knocking sound. In addition, the water supply system must be emptied and stored in the environment where ice may be used to prevent pipeline frostbite; Check the tightness of the system regularly and apply sealant for pipeline in key parts.
Therefore, in order to ensure the efficient working state of concrete mixer, daily maintenance is particularly important, and the inspection work before and after use is essential. More content will come to our website www.bangping.net for consultation!