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　　在混凝土攪拌一體車(chē)使用過(guò)程中，如果液壓系統(tǒng)出現(xiàn)故障會(huì)使攪拌一體車(chē)的工作性能大大降低，車(chē)主朋友們只有了解了液壓系統(tǒng)的故障原因并及時(shí)排出故障才能使攪拌一體車(chē)恢復(fù)正常，今天收集了有關(guān)攪拌一體車(chē)液壓系統(tǒng)壓力不足或完全無(wú)壓力的原因、診斷和排除，供車(chē)主朋友們參考學(xué)習(xí)。

　　In the process of using the concrete mixer truck, if the hydraulic system fails, the working performance of the truck will be greatly reduced. Only when the owners understand the fault causes of the hydraulic system and timely eliminate and solve the fault, can the truck return to normal. Today, we collected the causes, diagnosis and treatment of insufficient or no pressure in the hydraulic system of the truck mixer Exclude, for car owners friends reference learning.

　　如果混凝土攪拌一體車(chē)出現(xiàn)液壓系統(tǒng)壓力不足或完全無(wú)壓力時(shí)，我們可以根據(jù)以下幾個(gè)方面依次進(jìn)行排查：

　　If there is insufficient or no pressure in the hydraulic system of the concrete mixer truck, we can check it according to the following aspects:

　　查看液壓泵是否能輸出液壓油。如果是新的液壓泵，無(wú)液壓油輸出，可能是泵體有鑄造缺陷（縮孔、砂眼等），使吸油腔和壓油腔相通，失去壓油能力，應(yīng)及時(shí)找廠家更換。若不是新的液壓泵，無(wú)液壓油輸出，則可能是泵的轉(zhuǎn)向不對(duì)，零件磨損嚴(yán)重或損壞，及時(shí)更換。

　　Check whether the hydraulic pump can output hydraulic oil. If it is a new hydraulic pump without hydraulic oil output, it may be that the pump body has casting defects (shrinkage cavity, sand hole, etc.), so that the oil suction chamber and the pressure oil chamber are connected, and the oil pressure capacity is lost, it should be replaced by the manufacturer in time. If it is not a new hydraulic pump and there is no hydraulic oil output, it may be that the steering direction of the pump is not correct and the parts are seriously worn or damaged. Replace them in time.
         

　　若液壓泵有油液輸出，查看溢流閥工作是否正常。若不正常，則可能是壓力油路中的某個(gè)閥有污物或其他原因卡住，處于回油位置，致使壓力油路與溢流回路短路，也可能是管接頭松脫，或處于壓力油路中的某些閥泄漏嚴(yán)重，或液壓缸、液壓馬達(dá)的密封損壞，嚴(yán)重泄漏。

　　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 it is in the oil return position, resulting in a short circuit between the pressure oil circuit and the overflow circuit, or the loose pipe joint, or serious leakage of some valves in the pressure oil circuit, or the seal damage of the hydraulic cylinder and hydraulic horse.

　　排除方法：拆開(kāi)有關(guān)閥進(jìn)行清洗，檢查密封間隙的大小及各種密封裝置，密封裝置損壞應(yīng)更換。

　　Troubleshooting: remove the relevant valve for cleaning, check the size of sealing clearance and various sealing devices, and replace the damaged sealing device.

　　若液壓泵輸出流量隨壓力升高而顯著減小，且壓力達(dá)不到規(guī)定值，則是由于液壓泵磨損后間隙增大所致。

　　If the output flow of the hydraulic pump decreases significantly with the increase of the pressure, and the pressure can not reach the specified value, it is due to the increase of the clearance after the wear of the hydraulic pump.

　　排除方法：測(cè)定液壓泵的容積效率，即可確定該泵是否能繼續(xù)使用，對(duì)磨損嚴(yán)重的零件，應(yīng)進(jìn)行修配或更換。

　　Exclusion method: determine the volume efficiency of the hydraulic pump, you can determine whether the pump can continue to use, the parts seriously worn should be repaired or replaced.

　　若整個(gè)液壓系統(tǒng)能建立正常壓力，而某些管路或液壓缸（或液壓馬達(dá)）中無(wú)壓力，則可能是由于管路、小孔或節(jié)流閥、換向閥等部位堵塞。此時(shí)，應(yīng)逐段檢查壓力和有無(wú)油液通過(guò)，找出原因，加以排除。

　　If the whole hydraulic system can establish normal pressure, but there is no pressure in some pipelines or hydraulic cylinders (or hydraulic motors), it may be due to blockage of pipelines, orifices, throttle valves and directional valves. At this time, check the pressure and whether there is oil passing through section by section, find out the reason and eliminate it.

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　　This article is provided by the concrete mixer truck, hope to help you, if you want to know more, welcome to click our http://www.fxsgujg.cn Website.