裝載機在工作過程中，如果機油的壓力低于0.2 MPa，應立即停機查找原因，待排除故障后方可繼續工作，否則會釀成燒瓦、拉缸等重大機械事故。現將山東裝載機機油壓力過低的主要原因介紹如下。Shandong loader in the work process, if the oil pressure is lower than 0.2 MPa, should immediately stop to find out the reasons, troubleshooting before it can continue to work, otherwise it will lead to the tile burning, cylinder and other major mechanical accident. The main reason for the low oil pressure of Shandong loader is introduced as follows.

1.發動機溫度過高。若裝載機發動機溫度過高，不但加速機油老化、變質，也容易使機油變稀，導致油壓下降。Engine temperature is too high. If the Shandong loader engine temperature is too high, not only to accelerate the aging of the engine oil, deterioration, but also easy to make oil thinning, resulting in decreased oil pressure.

2.曲軸與連桿軸承配合間隙過大。發動機長期使用后，曲軸與連桿軸承的配合間隙會逐漸增大，裝載機的機油壓力也隨著下降。Crankshaft and connecting rod bearing clearance is too large. Long term use of the engine, the crankshaft and connecting rod bearing clearance will gradually increase, the oil pressure of the Shandong loader also decreased.

3.機油濾油器堵塞。當機油因濾油器堵塞而不能流通時，設在濾油器底座上的安全閥就被頂開，機油便不經過濾而直接進入主油道。如果安全閥的開啟壓力調得過高，濾油器被堵塞時，安全閥就不能及時打開，于是機油泵壓力升高，內漏增加，裝載機主油道供油量減少，引起油壓下降。Oil filter plug. When the oil is blocked because of the oil filter and can not flow, the safety valve is arranged on the base of the oil filter, and the oil can be directly entered into the main oil pump without filtering. If the pressure is too high to open the safety valve, the oil filter is blocked, the safety valve can not be opened, so the pump pressure increases, the internal leakage increases, Shandong loader main oil reduced oil supply, caused by pressure drop.

4.機油散熱器或管路漏油。機油散熱器及管路漏油，會使油壓下降。裝載機的管路若被臟物堵塞，也會因阻力增大而使油的流量減少、油壓下降。Oil radiator or oil leakage. Oil radiator and pipeline leakage, will make the oil pressure drop. If the pipe is clogged by dirt, the Shandong loader will reduce the flow of oil and reduce the oil pressure due to the increase of resistance.

5.油壓傳感器失靈或油管堵塞。若油壓傳感器失靈，或由主油道至油壓傳感器的油管因污垢積聚而流通不暢時，裝載機的油壓表將顯示機油壓力下降。Oil pressure sensor failure or tubing blockage. If the oil pressure sensor is out of order, or the oil pipe from the main oil path to the oil pressure sensor is accumulated and the circulation is not smooth, the oil pressure gauge of the Shandong loader will display the oil pressure drop.

6.機油牌號不對或質量不合格。不同型號的發動機須添加不同的機油，裝載機同種機型在不同的季節也應采用不同牌號的機油。如果機油牌號不對，發動機運轉時會因機油黏度太低而加大泄漏量，從而使油壓降低。Incorrect grade or quality of oil. Different types of engines must be added with different oil, the same type of Shandong loader in different seasons should be used in different grades of oil. If the engine oil is not right, the engine will run because the oil viscosity is too low and increase the leakage, so that the oil pressure to reduce.

7.裝載機的調壓閥設定壓力偏低。如果調壓閥設定油壓低，機油就不能有效地輸送到各潤滑部位，從而發生機械故障。如果油壓過高，就會增加油耗，給機油泵和潤滑部位增加負荷，損壞油路密封件并引發機油泄漏。Shandong loader pressure regulating valve set pressure is low. If the setting pressure of the pressure regulating valve is low, the oil can not be effectively delivered to each lubricating part, and the mechanical failure occurs. If the oil pressure is too high, it will increase fuel consumption, oil pump and lubricating parts to increase the load, damage to the oil seal and lead to oil leakage.