Fuel Injector Nozzle DLLA155S305C2

Disassembly and Inspection of Injector Head and Grinding Repair Skills of injector nozzle Coupling (part 4)

The matching requirements between the nozzle hole of the injector nozzle body and the small head of the injector nozzle are also very high, and the general clearance is 0.02-0.06mm. The nozzle hole of the injector nozzle body is too small (this situation will be found when the injector nozzle is selected), you can assemble the injector nozzle into the injector nozzle body, and then tap the injector nozzle lightly to make the small head of the injector nozzle stick out of the injector nozzle body flat. Then pull out the injector nozzle , cover the small end of the injector nozzle body with the center positioning piece, and insert the small end of the injector nozzle into the small hole of the injector nozzle body. Do this repeatedly until you get a little loose.

When the nozzle hole of the injector nozzle body is large, cover the small end of the injector nozzle body with a central positioning piece, and tap it with a 120° conical punch (Fig. 7, Fig. 8, Fig. 9).

The severity of the percussion should be determined according to the size of the hole, and then the injector nozzle should be put in until it can rotate. If the nozzle hole is small, it must not be knocked from the outside to the inside, otherwise the injector nozzle will rush out of the edge, resulting in poor atomization during use. Due to the different wear conditions of the small heads of the injector nozzle , there is no need to use a special punching tool for punching.

After trimming, the injector nozzle and injector nozzle body should be thoroughly cleaned before testing.