However, for many users, the understanding of small concrete mixer is only one-sided. There is no way to distinguish the "good or bad" of a small concrete mixer, but only through the simplest price problem.

首先小型混凝土搅拌车的整体外观尺寸应该符合国家标准的规定，搅拌车上装质量不得超过底盘的载重总值，罐体焊缝应做到均匀、光滑平直，无漏焊、夹渣、裂纹、包砂等现象，上装整体做好防锈处理。

Firstly, the overall appearance dimension of the small concrete mixer truck shall comply with the provisions of national standards. The loading quality of the mixer truck shall not exceed the total load value of the chassis. The tank weld shall be uniform, smooth and straight without missing welding, slag inclusion, crack, sand wrapping and other phenomena. The overall loading shall be subject to anti rust treatment.

然后要看上装搅拌罐的进出料口要符合标准，罐体内部螺旋设计合理，使经过运输的能混凝土能达到标准使用要求，整体密封性能良好，各部件密封接口及液压油管接口不得有渗油漏气等现象出现。上装部分和底盘连接安装牢固，卸料速度不低于0.7m³/min，卸料残余率小于2%，进料速度不小于2.7m³/min。

Then, it should be noted that the inlet and outlet of the mixing tank should meet the standards, the internal screw design of the tank body should be reasonable, so that the transported concrete can meet the standard use requirements, the overall sealing performance is good, and the sealing interfaces of various components and hydraulic oil pipe interfaces should be free of oil and air leakage. The upper part shall be firmly connected with the chassis, and the unloading speed shall not be less than 0.7m ³/ Min, the unloading residual rate is less than 2%, and the feeding speed is not less than 2.7m ³/ min。

那么减速机在长时间的工作使用后，难免会出现一些小的故障问题。基本上最常见的分为漏油和出现异响两类问题。

Then, after the reducer is used for a long time, some small faults will inevitably occur. Basically, the most common problems are oil leakage and abnormal noise.

首选是漏油的问题，我们要根据不同的漏油位置，来处理问题:1、油封处漏油，这种情况最容易造成的就是异物划伤或缠绕所致，排除异物并更换油封；2、端盖和壳体处漏油，这个地方漏油多是端盖紧固螺丝松动造成，检查并上紧螺丝一般就可解决；3、与液压马达连接处漏油，此时应检查连接处O型圈是否完好，同时检查固定螺丝是否松动。

The first choice is oil leakage. We should deal with the problem according to different oil leakage positions: 1. Oil leakage at the oil seal. This situation is most likely caused by foreign matter scratch or winding. Remove foreign matters and replace the oil seal; 2. The oil leakage at the end cover and shell is mostly caused by the loose fastening screws of the end cover. Generally, it can be solved by checking and tightening the screws; 3. If there is oil leakage at the connection with the hydraulic motor, check whether the O-ring at the connection is intact and whether the fixing screw is loose.

减速机异响我们首先要检查齿轮油是否正常，齿轮油缺少或杂质过多，应及时更换齿轮油；重车的时候才出现异响，检查罐体拖轮和跑带是否磨损严重，如果出现磨损严重，就会造成载重的时候罐体角度过大使减速机出现异响；出现异响并且车身抖动，多是由液压系统问题造成，检查液压油是否出现问题，如未发现异常就需要检查油泵和液压马达。

If the reducer makes abnormal noise, we should first check whether the gear oil is normal. If the gear oil is missing or there are too many impurities, we should replace the gear oil in time; The abnormal noise only occurs when the vehicle is loaded. Check whether the tank tug and running belt are seriously worn. If the wear is serious, the tank angle will be too large when the load is loaded, and the reducer will make abnormal noise; Abnormal noise and body shaking are mostly caused by hydraulic system problems. Check whether there is a problem with the hydraulic oil. If no abnormality is found, check the oil pump and hydraulic motor.

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