What is an oil pump? The oil pump is a component used to increase the oil pressure and ensure a certain amount of oil supply, forcibly supplying oil to various friction surfaces. Internal combustion engines widely use gear and rotary oil pumps Gear type oil pumps have a simple structure, easy processing, reliable operation, long service life, high pump oil pressure, and are widely used. Rotary pumps have complex rotor shapes and are often pressed by powder metallurgy. This type of pump has the same advantages as gear pumps, but with a compact structure and small volume. What is an oil pump? How to replace the oil pump? Analysis of common faults in oil pumps: The function of an oil pump is to increase the pressure of the engine oil to a certain level and force it onto the moving surfaces of various engine components. The structure of oil pumps can be divided into two types: gear type and rotor type. Gear type oil pumps are divided into internal gear type and external gear type, with the latter generally referred to as gear type oil pumps. The application of oil pumps in internal combustion engines is increasing. Meanwhile, it also plays a certain role in engineering fields such as semiconductors, solar energy, LCD, etc. With the development of processing technology, automotive oil pumps - cycloidal rotor pumps - have been applied to sewing machines, especially for some models with fully enclosed automatic lubrication systems, such as overlock sewing machines and overlock sewing machines. The application field of oil pumps is very wide, and they play an important role in the process of use. The damage they may suffer is also relatively large. So, how should we replace the oil pump when it malfunctions? What is an oil pump? How to replace the oil pump? The common fault analysis of oil pump: The replacement method of oil pump is very simple. First, all the oil needs to be drained, the engine oil pan needs to be disassembled, and the oil pump assembly needs to be removed and replaced. It is important to understand the main causes of problems with the oil pump. Here, the editor of Xianji.com also introduces common faults of oil pumps: 1. Inflation. It refers to the oil pump that allows air bubbles and engine oil to pass through the engine together. After inflating the engine oil, its lubrication performance decreases, which can cause malfunctions. One phenomenon that occurs after oil inflation is that all hydraulic valve lifters make noise. 2. Casting fracture. The cracking of pump castings is usually caused by uneven installation of the pump. Installation personnel should read the precautions sheet attached to the purchased oil pump to master the necessary knowledge for installing the oil pump correctly. 3. The intermediate shaft is damaged. Particles of foreign objects (foreign objects falling off the valve stem seal, fragments of bearings, locking rings of valve lifters, and parts falling off plastic camshafts and sprockets) will enter the pump chamber through the suction screen. If there are large particles left between the gears or impellers, the pump will get stuck. At this point, the intermediate shaft may twist and break. 4. The pressure reducing valve is stuck. The fitting tolerance of the oil pump pressure reducing valve is very strict. If foreign objects enter the pump, it will cause the pressure reducing valve to get stuck. If the pressure reducing valve is stuck in the open position, it will cause low or no oil pressure. If the pressure reducing valve is stuck in the closed position, it often causes damage to the oil filter. When driving off-road, the pressure reducing valve on the V-6 engine of a Jeep often gets stuck in the closed position. This is due to the front axle cover causing the aluminum timing case cover of the oil pump assembly to bulge or sink, resulting in damage to the oil filter. 5. Gear or impeller wear. Abrasive particles (dirt, casting slag, processing residue, and wear particles) can scratch the impeller or gear. 6. The internal gap is too large. An increase in oil pump clearance will cause a decrease in oil pressure.