DLLA152PN009 Common Rail Diesel /Fuel Injector BOSCH Injector Nozzle

The reasons for the stuck fault of the fuel injector are as follows

1. The end of the oil pipe and the connecting bolts are stained with dust and impurities:

2. Improper handling and incorrect installation during maintenance and replacement of parts; 3. The fuel added is not clean, and the precipitated oil in the fuel tank and filter product is not drained before starting, so that the dirty fuel enters the fuel pump

4. There are carbon deposits and burning damage at the shoulders and feet of the fixed nut in the fuel injector; the sealing gasket is not flat; The temperature is too high, the heat load of the fuel injector increases, etc.;

5. The fuel injection pressure is not adjusted correctly: The fuel injection pressure adjustment screw is loose, the pressure regulating spring is broken, and the steel ball in the ejector rod is severely worn or even damaged, which may also cause the fuel injector to be stuck.

If the fuel injector is stuck, put the stuck fuel injector into diesel oil or engine oil to warm up, then take it out and wrap it with a cloth, then clamp the needle valve with hand pliers and slowly move it to move the needle valve from the needle Take it out of the valve body. Drop a small amount of clean engine oil into the needle valve body, and make the needle valve move repeatedly in the needle valve body until the needle valve can move freely in the needle valve body. If there are signs of burns on the sealing surface of the needle valve, it should be ground with abrasive paste. When grinding, pay attention to the amount of grinding paste and the grinding time. Install the cleaned needle valve assembly on the fuel injector and adjust the fuel injection pressure before it can be reused.