Diesel Injector Fuel Injector 0445120331 Bosch for CATERPILLAR excavator Perkins engine

Inspection and adjustment of the fuel injector

The detection test of the fuel injector should be carried out on a special tester.
1. Test and adjustment of the fuel injection pressure of the fuel injector. Install the fuel injector under test on the tester, first operate the handle of the fuel pump, pump the diesel into the fuel injector, and observe that the oil pressure of the fuel injector is equal to or equal to the oil pressure. The pressure indicated on the table, the size of this pressure is the fuel injector
The pressure value of the fuel injector of each cylinder should not exceed 980 kPa. The pressure of the fuel injector can be adjusted by adjusting the pressure adjusting screw to adjust the pre-tightening force of the pressure adjusting spring. Turn the screw inward to increase the fuel injection pressure. Conversely, the fuel injection pressure decreases
2. Fuel injection quality inspection
Install the fuel injector on the tester, turn the handle of the oil pump 60-80 times by hand, carefully observe the oil mist sprayed by the fuel injector, and you can see that the oil mist is fine and fine, and there should be no lines Or feathery oil beams, let alone oil droplets.
3. Fuel injector injection and stop
The reliability of the fuel injection can be tested on the tester. When the fuel injection pressure is lower than 1960 kPa, there should be no oil dripping at the nozzle of the fuel injector.
Injector tester: 1. Fuel tank: 2. Switch: 3. Vent plug: 4. Tester: 5. Handle: 6. Pressure gauge; 7. Oil pipe; 8. Lock nut: 9. Fuel injector