1.檢查液壓泵是否可以輸出液壓油。如果是沒有輸出液壓油的新型液壓泵，則泵體可能存在鑄造缺陷，因此吸入室和液壓室相連，油壓降低，并且制造商應及時更換。如果不是新的液壓泵，并且沒有液壓油輸出，則可能無法正確操作泵，并且零件可能會嚴重磨損或損壞。
1. Check whether the hydraulic pump can output hydraulic oil. If it is a new hydraulic pump that does not output hydraulic oil, the pump body may have casting defects. Therefore, the suction chamber is connected with the hydraulic chamber, the oil pressure is reduced, and the manufacturer shall 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 parts may be severely worn or damaged.
2.如果液壓泵有油輸出，請檢查安全閥是否正常工作。如果異常，則壓力油回路中的閥可能由于其他原因被污染或阻塞，并且處于回油位置，導致壓力油回路與溢流回路短路，或者管接頭可能松動或受壓。油路中的某些閥泄漏嚴重，或者液壓缸和液壓馬達的密封件損壞，導致嚴重泄漏。
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 contaminated or blocked due to other reasons and be in the oil return position, 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 leak seriously, or the seals of the hydraulic cylinder and hydraulic motor are damaged, resulting in serious leakage.
3.如果液壓泵的輸出流量隨壓力的增加而顯著下降，但壓力未達到規定值，則是由于液壓泵磨損后間隙的增加所致。
3. If the output flow of the hydraulic pump decreases significantly with the increase of pressure, but the pressure does not reach the specified value, it is due to the increase of clearance after the hydraulic pump is worn.
4.如果混凝土攪拌車的整個液壓系統能夠建立正常壓力，并且某些管線或液壓缸（或液壓馬達）中沒有壓力，則可能是由于管線，小孔或節流閥，方向閥等引起的。進行封鎖時，應逐一檢查壓力和機油以找出原因并進行清理。
4. If the whole hydraulic system of the concrete 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 clean it up.
混凝土攪拌車壓力調節介紹就是這些，希望對你有幫助。
This is the introduction of pressure regulation of concrete mixer truck. I hope it will be helpful to you.
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