Diesel Injector Fuel Injector 0445110291 0445110447 Bosch

(4) During assembly, the injector cap tightly presses the upper end surface of the needle valve body and the lower end surface of the injector body through the supporting shoulder. The end of the needle valve is in the shape of an inverted cone pin, and the inverted cone pin is inserted into the needle valve In the nozzle hole of the body, an inverted cone annular gap is formed. When the needle valve is raised to spray oil, a positive cone mist oil beam can be formed, which greatly improves the spray quality. (5) During installation, in order to align the oil inlet hole of the fuel injector with the nut joint of the high-pressure fuel pipe, first connect the nut joint of the high-pressure fuel pipe with the bolt of the oil inlet hole of the fuel injector, and then tighten the nozzle evenly in 2 to 3 times. Oiler fixing bolts, and then tighten the high-pressure oil pipe nut joint. (6) The sealing gasket of the fuel injector must not be missing. The purpose of the sealing gasket is not only to prevent air leakage and play a sealing role, but also to ensure that the fuel injector has an optimal position, so that the diesel engine can obtain the best economy and power when it is working. If the sealing gasket is missing, the joint between the fuel injector and the fuel injector seat hole will not be well sealed, resulting in air leakage. If there is a sound of air leakage, remove the fuel injector to check whether the gasket is missing. Do not blindly tighten the nut of the fuel injector. If there is no gasket in the seat hole or the gasket has expired due to long-term use, it should be reinstalled or Replace with a qualified sealing ring. The specifications of the sealing ring have strict requirements. If the gasket is too thick or too thin, it will destroy the best working position and working performance of the injector.