First of all, according to the specific wear of the concrete mixer, we should observe whether there are problems in the color and quality of the oil, observe whether there are iron chips on the surface, and check the oil viscosity. If there are a lot of iron chips in the engine oil, it means that the crankshaft bearing bush and connecting rod bush are seriously worn. If the oil is viscous, it means that the oil has not been replaced for a long time.

在拆开连杆活塞的曲轴时，观察连杆瓦、曲轴瓦具体状况，整机均不可使用。若磨损情况不严重，可让其经过磨轴加工后，混凝土搅拌车方可使用。

When the crankshaft of connecting rod piston is disassembled, observe the specific conditions of connecting rod bush and crankshaft bush. The whole machine can not be used. If the abrasion is not serious, the concrete mixer can be used after grinding the shaft.
        

观察气缸套的具体磨损情况，在拆开缸套时，禁止打到发动机机体，避免出现严重损坏情况。

Observe the specific wear of the cylinder liner. When the cylinder liner is disassembled, do not hit the engine block to avoid serious damage.

对于混凝土自动搅拌车来说，在整个维修期间，每个动作都应谨慎小心，任何一个细节的错误都会致使发动机不能达到正常工作状态，因此在对混凝土搅拌车维修时，应请专门的技术人员进行，避免出现更大失误。

For the automatic concrete mixer, during the whole maintenance period, every action should be cautious and careful, any detail error will cause the engine can not reach the normal working state, so in the maintenance of the concrete mixer, special technicians should be asked to avoid greater mistakes.

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