What are the general categories of reasons for an oil pump failing to deliver oil?
2 Answers
The reasons for an oil pump failing to deliver oil when started are as follows: 1. Poor assembly or reverse rotation of the oil pump. 2. Air entering due to an unsealed oil pump casing. 3. Leakage caused by an unsealed suction pipe system. 4. Blockage of the suction pipeline. 5. Unsealed packing gland of the oil pump. 6. Clogged oil filter or failure of the suction check valve. 7. Insufficient oil in the tank. The troubleshooting methods are as follows: 1. Inspect and repair the oil pump. 2. Clean and repair the oil filter, suction valve, and suction pipeline. 3. Eliminate all unsealed parts to prevent air leakage. 4. Use the oil filling method to expel air from the suction pipe and oil pump. 5. Maintain a certain oil level in the tank.
I've encountered fuel pump failures several times, which can be summarized into three main categories: The most common issue is the fuel pump itself malfunctioning, such as severely worn pump cores leading to complete failure, or burnt-out motors causing immediate shutdown. Fuel system problems are also frequent, like gasoline filters clogged solid, fuel lines crushed and deformed, or suction pipes in the fuel tank blocked by debris. Electrical issues are not uncommon either – a faulty fuel pump relay, blown fuse, short circuit, or poor contact can all lead to fuel supply interruption. Last time my car broke down on the road, it was because the fuel pump filter screen got completely clogged with debris, causing the fuel supply to drop to zero. For vehicles over three years old, I recommend checking the fuel pump condition during every maintenance service, as a failure will leave your car completely immobilized.
