Fuel injector working 700h or so should be checked and adjusted once. If the opening pressure is lower than the specified value of 1Mpa or the needle valve head carbon deposit is serious, the needle valve should be discharged into the clean diesel oil with wood chips to scrape the carbon deposit, dredge the spray hole with fine steel wire, and debug 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 can be completely burned in time, it is necessary to check the fuel supply time of the oil pump regularly. If the fuel supply time is too early, the vehicle will have difficulties in starting and cylinder knocking. Oil supply time is too late, will lead to black smoke exhaust, machine temperature is too high, fuel consumption rise.

The injection needle valve coupling parts of the high precision, and the injection hole aperture is very small, so it must be strictly in accordance with the seasonal changes of the selection of clean diesel, otherwise the injector can not work normally.

When cleaning the injector needle valve couple, it shall not collide with other hard objects, nor make it fall to the ground, so as to avoid bruising.