The injector is a high-precision precision device, which has high requirements on dynamic flow range and anti-clogging performance. Therefore, it is more important for the maintenance of the injector. Now we understand the maintenance work of the injector:
The injector should be checked and adjusted once every 700 hours. If the opening pressure is lower than the specified value of 1Mpa or the head of the needle valve is severely carbonized, the needle valve should be unloaded into the clean diesel oil and scraped with carbon chips. The fine steel wire should be used to clear the nozzle hole and be installed after commissioning. It is required that the injection pressure difference of various cylinders of the same Jiqi must be less than 1Mpa.
In order to allow the fuel injected into the cylinder of the injector to be completely burned in time, the oil supply time of the oil pump must be checked regularly. If the fuel supply time is too early, the vehicle will have difficulty in starting up and knocking the cylinder. If the oil supply time is too late, the exhaust will emit black smoke, the machine temperature will be too high, and the fuel consumption will rise.
The matching precision of the needle part of the injector is extremely high, and the orifice diameter is very small. Therefore, the clean diesel oil must be selected in strict accordance with the seasonal changes, otherwise the injector will not work normally.
Do not collide with other hard objects when cleaning the needle valve of the injector, or drop it to the ground to avoid bruising and scratching. When replacing the needle valve of the injector, the new part should be put into the hot diesel oil of 80 °C for about 10s, so that the anti-rust oil is fully dissolved, then the needle valve is twitched back and forth in the valve body in the clean diesel. Wash thoroughly, in order to avoid the failure of the needle valve due to the melting of the rust preventive oil during the operation of the injector.