搅拌车运行时，后轴有噪音，特别是转速急剧变化时，能听得清清楚楚。当有异常声音时，应注意其特点进行诊断。

When the mixer truck is running, there is noise on the rear axle, especially when the rotating speed changes sharply, you can hear it clearly. When there is abnormal sound, pay attention to its characteristics for diagnosis.

①自动上料搅拌车运行时，后轴连续有异响或节律性冲击噪声，且随着车速的增加，噪声增大。

① When the automatic loading mixer is running, there is continuous abnormal noise or rhythmic impact noise on the rear axle, and the noise increases with the increase of vehicle speed.

②搅拌车运行时，后轴有节律性异响，随车速的增加而增加，特别是燃油门或节气门关闭时，严重时后轴摆动。

② When the mixer truck is running, the rear axle makes a rhythmic abnormal noise, which increases with the increase of vehicle speed, especially when the fuel valve or throttle valve is closed, and the rear axle swings seriously.

③搅拌车高速（接近60km/h）运行，油门缩回时，后轴有异响，后轴有晃动。

③ When the mixer truck runs at high speed (nearly 60km/h) and the accelerator retracts, the rear axle makes abnormal noise and shakes.

后轴的异响故障不仅是噪声侵袭人、齿轮等零件磨损加剧，而且严重影响车辆的正常行驶。因此，行车中应注意检查和倾听，及时排除故障。

The abnormal sound fault of the rear axle is not only the noise attacks people, the wear of gear and other parts is aggravated, but also seriously affects the normal driving of the vehicle. Therefore, pay attention to inspection and listening during driving to eliminate the fault in time.

行驶中如有持续的异响，应停车检查。如果用手触摸后桥壳，如果发热量不大，齿隙过小；如果发热严重，一般是缺油，应检查油位。根据情况调整齿隙或加润滑油。行驶中如有撞击声，齿隙一般过大。

If there is continuous abnormal noise during driving, stop the vehicle for inspection. If the rear axle housing is touched by hand, if the heat is not large, the backlash is too small; If the heating is serious, it is generally lack of oil, and the oil level should be checked. Adjust the backlash or add lubricating oil according to the situation. If there is an impact sound during driving, the backlash is generally too large.

自动上料搅拌车车速越高，声音越大，滑行时声音减小或消失，一般是由于轴承磨损或齿隙异常引起的。急变速或上坡时有异响，说明齿隙过大。更换轴承或根据情况调整齿隙。

The higher the speed of the automatic loading mixer truck is, the louder the sound is. The sound decreases or disappears when sliding. It is generally caused by bearing wear or abnormal backlash. There is abnormal noise during rapid speed change or uphill, which indicates that the backlash is too large. Replace the bearing or adjust the backlash as appropriate.

此外搅拌车有时候会在转弯时会有异响，即使低速直线行驶时也会有异响，但随着车速的提高，异响会消失，主要原因是变速器行星齿轮啮合间隙过大，或半轴齿轮和键槽磨损。如果在行驶过程中后轴突然发出噪音，大部分是轮齿损坏，应立即停车检查，否则会严重损坏齿轮。

In addition, the mixer sometimes makes abnormal noise when turning, even when driving at low speed in a straight line. However, with the increase of vehicle speed, the abnormal noise will disappear. The main reason is that the meshing clearance of the transmission planetary gear is too large, or the half shaft gear and keyway are worn. If the rear axle makes a sudden noise during driving, most of which is tooth damage, stop the vehicle immediately for inspection, otherwise the gear will be seriously damaged.

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