长臂挖掘机

省时 省力 省财富

挖掘机的加长臂改装可以帮助原本的机械有更加强劲的动力，长臂挖掘机在施工场地愈加独领风骚，挖掘机加长臂的需求也水涨船高。长臂挖掘机厂家针对挖掘机改装加长臂后出现的各类故障的问题现把几个普遍的问题与大家分享。

The modification of the extended arm of the excavator can help the original machinery to have more powerful power. The long arm excavator is becoming more and more dominant in the construction site, and the demand for the extended arm of the excavator is also rising. The manufacturer of long arm excavator will share with you a few common problems about various failures after the excavator is refitted and extended.

1、挖机右行走和铲斗无动作，动臂和斗杆动作慢

1. There is no movement of the excavator's right travel and bucket, and the boom and stick move slowly

在更换完控制阀总成的密封后即出现此故障。测后泵收铲斗时的压力为1.5Mpa，远小于正常值的28.5Mpa。在准备交换两路的安全阀时，发现故障一侧的安全阀位置上为一堵头而原堵头的位置却安装了安全阀。交换正确位置后机器正常。原来维修人员更换完控制阀总成的密封后，将该组阀的安全阀与堵头位置装反。

This failure occurred after the seal of the control valve assembly was replaced. The measured pressure when pumping the bucket is 1.5Mpa, which is far less than the normal value of 28.5Mpa. When preparing to exchange two safety valves, it was found that there was a plug at the safety valve position on the fault side, but a safety valve was installed at the original plug position. The machine is normal after exchanging the correct position. After the original maintenance personnel replaced the seal of the control valve assembly, the safety valve and plug of the group of valves were installed reversely.

2、改装成挖掘机加长臂后，全车慢、无力

2. The whole vehicle is slow and weak after being refitted into an excavator extension arm

机主反映刚更换了先导泵油封，但更换后工作了十几分钟一直很正常，然后突然就不行了。根据此情况，首先怀疑先导压力不足。

The owner said that the pilot pump oil seal had just been replaced, but it worked normally for more than ten minutes after the replacement, and then suddenly it stopped working. Based on this situation, first suspect that the pilot pressure is insufficient.

经测试先导压力低，决定分解先导泵。

After testing the pilot pressure is low, it is decided to disassemble the pilot pump.

发现先导泵输入轴的骨架油封已挤出，此原因有两种：一是安装问题，二是该处压力过高。继续分解发现先导泵的油封方向装反。此处才是故障的真正原因，当刚开始工作时，骨架油封没有完全损坏，仍可正常工作，因骨架油封只能承受低压，故油封很快损坏，导致先导压力油从损坏处泄出。

It is found that the skeleton oil seal of the pilot pump input shaft has been squeezed out. There are two reasons for this: one is the installation problem, and the other is that the pressure here is too high. Continue to disassemble and find that the oil seal direction of the pilot pump is reversed. This is the real cause of the failure. When the skeleton oil seal was just started to work, it was not completely damaged and could still work normally. Because the skeleton oil seal can only withstand low pressure, the oil seal was quickly damaged, causing pilot pressure oil to leak out from the damaged part.

3、改装成挖掘机加长臂后，发动机起动后斗杆油缸的活塞杆自动缩回，其它动作正常。

3. After being refitted into an excavator extension arm, the piston rod of the stick cylinder automatically retracts after the engine starts, and other actions are normal.

经检查，一其余动作正常；二提起动臂后斗杆下沉较快。交换斗杆先导管后故障依旧，说明故障在控制阀或斗杆油缸，本着先易后难的原则。拆检控制阀杆，发现阀杆卡在活塞杆缩回位置，用橡胶螂头和铜棒震动后取出阀杆。可见有闪亮铁末，联系斗杆下沉较快。判断故障根源为加长臂斗杆缸筒拉伤，拆检斗杆油缸后证实。

After inspection, one of the other actions is normal; II. The stick sinks rapidly after lifting the boom. The failure remains after the pipe is replaced, indicating that the failure is in the control valve or stick cylinder, and the principle of "easy before difficult" is followed. Disassemble and inspect the control valve rod. It is found that the valve rod is stuck in the retracted position of the piston rod. Shake it with a rubber head and a copper rod and take out the valve rod. It can be seen that there is shiny iron powder, and the connecting stick sinks rapidly. It was determined that the root cause of the fault was the strain of the cylinder barrel of the extended arm stick, which was confirmed after the inspection of the stick cylinder.

今天的内容就先为大家介绍到这里了，如果您在使用挖掘机加长臂时还有其它疑问，欢迎您拨打我公司售后电话咨询！也可以通过网站http://www.dybocheng.com了解更多使用内容，当然要知道改装有风险，不能随意进行改装！

This is the end of today's content. If you have any other questions when using the excavator extension arm, please call our after-sales telephone! You can also use the website http://www.dybocheng.com Learn more about the use of content, of course, we should know that the modification is risky, and we can not modify at will!