The needle valve of the fuel injector burns to death
The main reasons that cause the fuel injector needle valve to burn are:
(1) Incorrect assembly method
(2) There is dirt in the fuel oil circuit
Diesel contains too many impurity particles, which is the main reason that the needle valve of the fuel injection nozzle burns. The fuel filter used in the engine generally can only filter out impurities larger than 0.05 mm. Obviously, the filtering ability is not too strong. If the fuel filter element is ruptured at this time, the upper and lower felt pads of the filter element are missing or damaged, so that part of the fuel enters the fuel injection pump directly, and the dirt may enter the fuel injection nozzle and block it.