Tunnel loader due to the mining loader in the process of working, if the oil pressure is lower than 0.2MPa, for the operator, it should stop immediately to find out the cause, until troubleshooting can continue to work, tunnel loader model is complete, mining small forklift, otherwise it will lead to tile burning, cylinder pulling and other major mechanical accidents. What are the causes of low oil pressure?

机油泵停转或泵油量不足：机油泵的驱动齿轮与驱动轴的固定销断裂或配合键脱落，以及机油泵吸入异物而将泵油齿轮卡住，都会使机油泵停止运转，机油压力也随之降为0。

If the oil pump stops running or the pump oil quantity is insufficient: the fixed pin of the drive gear and the drive shaft of the oil pump is broken or the matching key falls off, and the oil pump sucks foreign matters and blocks the oil pump gear, the oil pump will stop running and the oil pressure will drop to 0.

曲轴与连杆轴承配合间隙过大：如果发动机长期使用后，曲轴与连杆轴承的配合间隙会逐渐变大，机油压力也随着下降。

The clearance between crankshaft and connecting rod bearing is too large: if the engine is used for a long time, the clearance between crankshaft and connecting rod bearing will gradually increase, and the oil pressure will also decrease.

机油滤油器堵塞：当机油因滤油器堵塞而不能流通时，设在滤油器底座上的稳定阀就被顶开，机油便不经过滤而直接进入主油道。如果稳定阀的开启压力调得过高，隧道装载机图片//企业矿山，滤油器被堵塞时，稳定阀就不能及时打开，于是机油泵压力升高，内漏增加，主油道供油量减少，引起油压下降。

Oil filter blockage: when the oil cannot flow due to the blockage of the oil filter, the stabilizing valve on the base of the oil filter will be pushed open, and the oil will directly enter the main oil passage without filtering. If the opening pressure of the stabilizing valve is adjusted too high, and the oil filter of the tunnel loader is blocked, the stabilizing valve can not be opened in time. As a result, the oil pump pressure increases, the internal leakage increases, and the oil supply quantity of the main oil passage decreases, resulting in the decrease of oil pressure.

回油阀损坏或失灵：若回油阀弹簧疲劳软化或调整不当，阀座与的配合面磨损或被脏物卡住而关闭不严时，回油量便明显增加，主油道的油压也会随之下降。

The oil return valve is damaged or out of order: if the spring of the oil return valve is fatigued and softened or improperly adjusted, the mating surface between the valve seat and the valve seat is worn or stuck by dirt, and the valve is not closed tightly, the oil return volume will increase significantly, and the oil pressure of the main oil passage will also decrease.

隧道装载机此外，如果矿用装载机的调压阀设定油压低，机油就不能有用地输送到各润滑部位，从而发生机械故障。如果油压过高，就会增加油耗，给机油泵和润滑部位增加负荷，损坏油路密封件并引发机油泄漏。

In addition, if the set oil pressure of the pressure regulating valve of the mine loader is low, the oil can not be effectively delivered to the lubrication parts, resulting in mechanical failure. If the oil pressure is too high, it will increase the oil consumption, increase the load to the oil pump and lubrication parts, damage the oil seal and cause oil leakage.