What are the symptoms of a hand oil pump pressure relief?

[AniyahMarie]

Symptoms of a hand oil pump pressure relief include: 1. Difficulty in starting the vehicle; 2. Engine shaking; 3. Reduced fuel supply from the hand oil pump; 4. Negative pressure in the fuel tank. When there is air in the diesel engine's fuel line, such as when starting a new engine, the engine may fail to start. The diesel fuel pump only operates when the engine is running, so the hand oil pump is used to pump fuel from the tank into the fuel line. The hand oil pump is suitable for transporting various oils, such as heavy oil, diesel, and lubricating oil. When equipped with copper gears, it can also transport low flash point liquids. The various pump types of the hand oil pump feature simple and compact structures, are easy to use and maintain, and have good self-priming capabilities, eliminating the need to fill the pump with liquid before each use.