Diesel Injector Fuel Injector 0445120239 Bosch for Cummins Engien

Troubleshooting and troubleshooting

(1) Feel the pulsation of the high-pressure oil pipe by hand when the engine is working. If the pulsation intensity is lower than the high-pressure fuel pipes of other cylinders, it is very likely that the fuel injection is bad. Use a wrench to loosen the high-pressure fuel pipe joint of the suspected cylinder to cut off the fuel. If the engine speed does not change, it means that the fuel injector of this cylinder is faulty and should be adjusted. school
(2) If the engine power drops obviously after replacing the diesel oil, there are black smoke from the exhaust pipe and other bad phenomena, it is proved that the poor atomization is caused by the poor quality of the diesel oil and should be replaced
(3) Remove the fuel injector from the cylinder and connect it to the high-pressure oil pipe, unscrew the pressure regulating screw cap and screw in the pressure regulating screw. It turns out that the fuel injection pressure is too low, it should be adjusted according to the specified pressure and the protective cap should be screwed on. The fuel injection pressure adjustment method should be adjusted on the fuel injector test bench. Install the fuel injector on the test bench evenly. Slowly press the handle of the test bench to the point where the pointer swings to the highest pressure when the injector starts to inject oil, which is the injection pressure of the injector. If the injection pressure does not meet the requirements, loosen the lock nut of the pressure regulating screw and turn it. Turn the pressure adjusting screw inward to increase the fuel injection pressure, and turn it outward to decrease the fuel injection pressure. If there is no test bench, the fuel injection pressure can be adjusted directly on the engine. Remove the fuel injector from the cylinder head and reinstall it. To the high-pressure fuel pipe (pay attention to tightening the nuts at both ends of the high-pressure fuel pipe) Put the throttle at the maximum position and turn the crankshaft quickly. First, lower the fuel injection pressure and then slowly increase it. When you hear the crisp sound of fuel injection, you can see the finely shattered handle of the spray. Put it at a distance of 33cm from the nozzle of the fuel injector. When you feel that the sprayed oil beam hits your hand strongly, it means that the fuel injection pressure basically meets the requirements. If the injection pressure is normal, disassemble and check whether the needle valve of the injector is stuck, whether the sealing surface of the valve body is worn or ablated, and whether the nozzle hole is enlarged or blocked by carbon deposits. should be repaired or replaced

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