The hydraulic system is very important for the self loading flat mouth mixer. Loading, unloading, and the rotation of the mixing tank can not be separated from the hydraulic system. Many owners of self loading flat mouth mixers will encounter this problem, that is, the pressure of the hydraulic system is insufficient, which makes the truck owners very anxious. What should we do at this time?

1、如果自上料平口自上料平口搅拌车的液压泵输出流量随压力升高而明显减小，且压力达不到规定值的话，则是由于液压泵磨损后间隙变大导致的。排除方法是测定液压泵的容积效率，即可确定该泵是否可以继续使用，对磨损严重的零件，应该进行修配或更换。

1. If the output flow of the hydraulic pump from the feeding flat port to the feeding flat port mixer truck decreases significantly with the increase of pressure, and the pressure does not reach the specified value, it is due to the larger gap after the wear of the hydraulic pump. The elimination method is to measure the volumetric efficiency of the hydraulic pump, so as to determine whether the pump can continue to be used. Parts with severe wear should be repaired or replaced.

2、若液压泵有油液输出，查看溢流阀工作是否正常。若不正常，则可能是压力油路中的某个阀有污物或其他原因卡住，处于回油位置，致使压力油路与溢流回路短路，也可能是管接头松脱，或处于压力油路中的某些阀泄漏严重，或液压缸、液压马达的密封损坏，严重泄漏。

2. If the hydraulic pump has oil output, check whether the relief valve works normally. If it is abnormal, it may be that a valve in the pressure oil circuit is stuck due to dirt or other reasons and is in the oil return position, causing a short circuit between the pressure oil circuit and the overflow circuit, or it may be that the pipe joint is loose, or some valves in the pressure oil circuit leak seriously, or the seals of the hydraulic cylinder and the hydraulic motor are damaged, causing serious leakage.

3、如果是自上料平口搅拌车的液压系统可以正常建立压力，而某些管路或液压缸(或液压马达)中没有压力的话，则可能是由于管路、小孔或节流阀、换向阀等部位出现堵塞。此时应该逐段检查压力和有无油液通过，找出原因，及时排除。

3. If the hydraulic system of the feeding flat mouth mixer can establish pressure normally, but there is no pressure in some pipelines or hydraulic cylinders (or hydraulic motors), it may be due to the blockage of pipelines, orifices or throttle valves, reversing valves and other parts. At this time, the pressure and whether there is oil passing through should be checked section by section to find out the cause and eliminate it in time.

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