The small mixer is a kind of machinery commonly used in the construction industry, which reduces the labor force for the construction personnel and also saves the cost. However, we always have various problems in the process of using, which makes the construction personnel suffer from troubles. The following small series is an answer to the problems of the self gravity pressure regulation of the small mixer:

1.查看液压泵是否可以输出液压油。假如是没有输出液压油的新型液压泵，则泵体或许存在铸造缺陷，因此吸入室和液压室相连，油压下降，而且制造商应及时替换。假如不是新的液压泵，而且没有液压油输出，则或许无法正确操作泵，而且零件或许会严峻磨损或损坏。

1. Check whether the hydraulic pump can output hydraulic oil. If it is a new type of hydraulic pump without output hydraulic oil, the pump body may have casting defects, so the suction chamber is connected with the hydraulic chamber, the oil pressure drops, and the manufacturer should replace it in time. If it is not a new hydraulic pump, and there is no hydraulic oil output, the pump may not operate correctly, and the parts may be severely worn or damaged.

2.假如液压泵有油输出，请查看阀是否正常作业。假如反常，则压力油回路中的阀或许由于其他原因被污染或堵塞，而且处于回油方位，导致压力油回路与溢流回路短路，或许管接头或许松动或受压。油路中的某些阀泄漏严峻，或许液压缸和液压马达的密封件损坏，导致严峻泄漏。

2. If the hydraulic pump has oil output, please check whether the safety valve works normally. If it is abnormal, the valve in the pressure oil circuit may be polluted or blocked due to other reasons, and it is in the oil return direction, resulting in a short circuit between the pressure oil circuit and the overflow circuit, or the pipe joint may be loose or pressurized. Some valves in the oil circuit have severe leakage. Maybe the seals of the hydraulic cylinder and hydraulic motor are damaged, leading to severe leakage.

3.假如液压泵的输出流量随压力的增加而明显下降，但压力未到达规定值，则是由于液压泵磨损后间隙的增加所致。

3. If the output flow of the hydraulic pump decreases obviously with the increase of the pressure, but the pressure does not reach the specified value, it is due to the increase of the clearance after the wear of the hydraulic pump.

4.假如小型搅拌机的整个液压体系可以树立正常压力，而且某些管线或液压缸（或液压马达）中没有压力，则或许是由于管线，小孔或节流阀，方向阀等引起的。进行封锁时，应逐个查看压力和机油以找出原因并进行整理。

4. If the whole hydraulic system of the small mixer can establish normal pressure, and there is no pressure in some pipelines or hydraulic cylinders (or hydraulic motors), it may be caused by pipelines, small holes or throttle valves, directional valves, etc. When blocking, check the pressure and oil one by one to find out the cause and sort it out.

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