液壓扳手是現在的生活中經常需要使用的工具，山東裝載機減壓閥出現故障的原因可能是因為壓力過高或者低于溢流閥，也有可能是因為壓力的不安定。這些故障都有可能導致閥芯的動作不連貫，或者提動閥不安定，也有可能導致油中混進空氣。我們可以打開排油的背壓變動閥芯中央的小孔，排查里面的油量。接著與其他的控制閥的油管分開打開，拍出里面的空氣。
Hydraulic wrench is now often need to use the tool life, because Shandong loader valve failure may be due to high pressure relief valve or below, may also be because of the pressure of instability. These failures are likely to lead to action is not consistent spool or poppet valve is not stable, it could lead to oil entering into the air. We can open the drain valve back pressure changes the central hole, the investigation inside the fuel. Subsequently tubing and other separate control valve opens, the air inside shoot.

山東裝載機http://www.jmkey.cn/流量控制閥出現故障有可能導致壓力補正的裝置不工作，這有可能是因為閥芯中有灰塵或者套筒里的小孔有灰塵造成的，針對這樣的情況只要在流量的出口壓力差分解清洗就可以了。
Shandong loaders flow control valve malfunction could lead to pressure correction device does not work, it may be because there is dust in the spool or sleeve in the holes caused by dust, the outlet pressure for such a situation as long as the flow poor decomposition cleaning it.
　　
山東裝載機流量的調整軸回轉緊，導致這種狀況的原因有可能是因為調整軸上占有灰塵。這里清理起來很費勁，一般的器具根不能不可能清理到那里。我們可以采取量入的方式，讓他在第二次壓力升高的時候啟動六點一下的刻度，一次壓高分解清理。
Cause Shandong loader flow adjustment shaft rotational tight, resulting in this situation may be due to an adjustment shaft possession dust. Here it is very hard to clean up, general clean-up equipment to where the root is not impossible. We can take the amount of the way, let him look at the scale starts at six in the second when the pressure increases, a high pressure decomposition cleanup.
　
山東裝載機http://www.jmkey.cn/液壓扳手還應該注意方向控制閥的保養和維修，人工操作的時候發現閥桿的油封漏油，這有可能是油封破損造成的，這種情況只要打開缸蓋，更換油封就可以了。
Shandong loader hydraulic wrench should also note that the directional control valve maintenance and repair, when the manually operated valve stem oil seal leak found, which may be caused by the seal broken, this simply open the cylinder head, replace the seal on it .