1.檢查自上料攪拌車的液壓泵是否可以輸出液壓油。如果是新的液壓泵，則沒有液壓油輸出，泵體可能有鑄造缺陷（收縮，沙孔等）。使吸油腔和油壓腔相互連通，從而失去油壓能力，應(yīng)由制造商及時(shí)更換泵體。如果不是新的液壓泵并且沒有液壓油輸出，則可能是泵的轉(zhuǎn)向錯(cuò)誤，零件嚴(yán)重磨損或損壞，應(yīng)及時(shí)更換。

1. Check whether the hydraulic pump of self feeding mixer can output hydraulic oil. If it is a new hydraulic pump, there is no hydraulic oil output, and the pump body may have casting defects (shrinkage, sand hole, etc.). The pump cavity and the oil pressure should be connected to each other by the manufacturer, so that the oil pressure can not be replaced in time. If it is not a new hydraulic pump and there is no hydraulic oil output, it may be the wrong steering of the pump, and the parts are seriously worn or damaged, so it should be replaced in time.

2.如果自上料攪拌車的液壓泵有油輸出，請(qǐng)檢查溢流閥是否正常工作。如果不正常，則可能是壓力油回路中的閥門由于灰塵或其他原因而卡住并且處于回油位置，從而導(dǎo)致壓力油回路與溢流管線或管路之間發(fā)生短路。接頭松動(dòng)，或壓力油回路中有一個(gè)接頭。某些閥嚴(yán)重泄漏，或者液壓缸和液壓馬達(dá)的密封件損壞，從而導(dǎo)致嚴(yán)重泄漏。的方法是拆卸相關(guān)的閥門進(jìn)行清洗，檢查密封間隙和各種密封裝置的尺寸，如有損壞，請(qǐng)更換密封裝置。

2. If the hydraulic pump of self feeding mixer has oil output, please check whether the relief valve works normally. If the pressure between the oil return circuit and the oil return circuit is not in the normal position, it may be caused by dust or other reasons. The connector is loose or there is a connector in the pressure oil circuit. Some valves have serious leakage, or the seals of hydraulic cylinder and hydraulic motor are damaged, resulting in serious leakage. The elimination method is to dismantle the relevant valve for cleaning, check the sealing clearance and the size of various sealing devices, if there is damage, please replace the sealing device.

3.如果自上料攪拌車的液壓泵的輸出流量隨壓力的增加而顯著下降，而壓力未達(dá)到指定值，則是由于液壓泵磨損后的間隙增大所致。方法是測(cè)量液壓泵的容積效率，以確定該泵是否可以繼續(xù)使用。嚴(yán)重磨損的零件應(yīng)修理或更換。

3. If the output flow of the hydraulic pump of the self feeding mixer decreases significantly with the increase of the pressure, and the pressure does not reach the specified value, it is due to the increase of the gap after the wear of the hydraulic pump. The elimination method is to measure the volumetric efficiency of the hydraulic pump to determine whether the pump can continue to be used. Severely worn parts should be repaired or replaced.

4.自上料攪拌車的液壓系統(tǒng)可以建立常壓，某些管路或液壓缸（或液壓馬達(dá)）沒有壓力，這可能是由于管路，小孔或節(jié)流閥，換向閥等部件堵塞造成的。此時(shí)，應(yīng)逐步檢查壓力和是否有油，以找出原因并。

4. The hydraulic system of self feeding mixer can establish normal pressure, and some pipelines or hydraulic cylinders (or hydraulic motors) have no pressure, which may be caused by blockage of pipelines, orifices or throttle valves, reversing valves and other parts. At this time, the pressure and oil should be checked step by step to find out the cause and eliminate it.