Maintenance editor

The fuel injector should be checked and adjusted once when it works for about 700h. If the opening pressure is more than 1MPa lower than the specified value or the carbon deposit on the head of the needle valve is serious, the needle valve should be unloaded and put into the clean diesel oil. The carbon deposit should be scraped off with wood chips, and the injection hole should be dredged with fine steel wire. After installation, the injection pressure difference of each cylinder of the same machine must be less than 1MPa.
In order to make the diesel fuel injected into the cylinder by the injector can burn completely in time, the fuel supply time of the oil pump must be checked regularly. If the fuel supply time is too early, the vehicle will have difficulties in starting and knocking the cylinder; if the fuel supply time is too late, the exhaust will emit black smoke, the engine temperature will be too high, and the fuel consumption will increase.

The matching precision of the needle valve coupling parts of the injector is very high, and the diameter of the injection hole is very small. Therefore, the specified brand of clean diesel oil must be selected strictly according to the seasonal change, otherwise the injector will not work normally.
Do not collide with other hard objects or drop to the ground when cleaning the needle valve of fuel injector, so as to avoid bruise. When replacing the needle valve coupling parts of the injector, the new coupling parts should be soaked in hot diesel oil at 80 ℃ for about 10 s to fully dissolve the antirust oil, and then the needle valve in the valve body in clean diesel oil will be swayed back and forth in the valve body to thoroughly clean. In this way, the failure of sticking the needle valve due to the dissolution of anti rust oil during the operation of the injector can be avoided.