液压扳手是现在的生活中经常需要使用的工具，山东装载机减压阀出现故障的原因可能是因为压力过高或者低于溢流阀，也有可能是因为压力的不安定。这些故障都有可能导致阀芯的动作不连贯，或者提动阀不安定，也有可能导致油中混进空气。我们可以打开排油的背压变动阀芯中央的小孔，排查里面的油量。接着与其他的控制阀的油管分开打开，拍出里面的空气。
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.

山东装载机http://www.132p.cn/流量控制阀出现故障有可能导致压力补正的装置不工作，这有可能是因为阀芯中有灰尘或者套筒里的小孔有灰尘造成的，针对这样的情况只要在流量的出口压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.
　　
山东装载机流量的调整轴回转紧，导致这种状况的原因有可能是因为调整轴上占有灰尘。这里清理起来很费劲，一般的器具根不能不可能清理到那里。我们可以采取量入的方式，让他在第二次压力升高的时候启动六点一下的刻度，一次压高分解清理。
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.
　
山东装载机http://www.132p.cn/液压扳手还应该注意方向控制阀的保养和维修，人工操作的时候发现阀杆的油封漏油，这有可能是油封破损造成的，这种情况只要打开缸盖，更换油封就可以了。
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 .