1. The orifice is blocked

The needle can be used for dredging, and the warp and weft shall be carefully cleaned after dredging. The large plane of the needle valve body has poor contact with the plane of the main body of the fuel injection nozzle, or the cylindrical surface of the needle valve is severely worn. If the large plane of the needle valve body is not in good contact with the plane of the main body of the fuel injection nozzle, chrome oxide can be coated on the flat plate for "8" shaped grinding; If the cylindrical surface of the needle valve is seriously worn, replace the needle valve couple in pairs.

2. Poor sealing

The needle valve and needle valve body are poorly sealed, resulting in poor atomization or oil dripping of the fuel injection nozzle.

This kind of fault can be coated on the sealing belt at the needle valve end with fine chrome oxide or toothpaste, but never on the cylindrical part, and then insert the needle valve into the needle valve body, knocking and rotating until it is tight. The grinding stone must wash away the chromium oxide or toothpaste.

3. There is air in the oil circuit

There is air in the oil circuit. Just exhaust the air in the oil circuit.

4. Abnormal oil supply

The fuel transfer pump needs to be overhauled. If the oil pipe joint leaks, try to connect it to prevent it from leaking.

5. Insufficient elasticity

The force of the piston spring is insufficient or the spring is broken. The spring should be replaced.

6. Piston worn

Piston wear affects oil supply. Replace the piston