The fuel pump is a system used in diesel engines in the past. It used to be a mechanical governor sprinkler system. In cars with ECUs, a pump is now a mechatronic unit integrated with an electrical unit instead of a mechanical one. Also, the oil pressure pumped from the pump is generally 300 bars ~ 400 bars.
Fuel Filter
The fuel filter is one of the most important components of a diesel engine. In the human body, the kidneys are used to clean the fuel as well as the fuel filter and water separator. Used, but should be replaced at factory time