工程机械用柴油机经常在大负荷和高温下工作，如果机油压力过低，将导致润滑不良，造成零件早期磨损。因此，一旦发现机油压力偏低或突然下降时，应及时查明原因并予以排除。（１）机油调压阀卡住在机油滤清器底座上设有一调压阀，其阀芯与阀座是平面接触，接触面易被机械杂质 Engine diesel engines often work under heavy load and high temperature, if the oil pressure is too low, will lead to poor lubrication, resulting in early wear parts. Therefore, once the oil pressure is found to be low or sudden decline, should promptly identify the reasons and be excluded. (1) oil pressure regulator stuck in the oil filter base with a pressure regulating valve, the valve plug and the valve seat is in flat contact, the contact surface easily be mechanical impurities