Injector maintenance
Check and adjust the oil supply of each cylinder of the injection pump regularly.
Due to the wear and tear of the plunger coupling and the oil valve coupling, the internal leakage of diesel will cause the oil supply of each cylinder to decrease or be uneven, resulting in the difficulty of starting the diesel engine, the lack of power, the increase of fuel consumption, and the instability of operation. Therefore, it is necessary to regularly check and adjust the oil supply of each cylinder of the injection pump to ensure the power of the diesel engine. In actual use, the amount of oil supplied by each cylinder can be determined by observing the exhaust smoke of the diesel generator, listening to the engine sound, and touching the exhaust manifold temperature.
Use standard high-pressure tubing.
Fuel injection pump in the oil supply process, due to the compressibility of diesel oil, the elasticity of high-pressure tubing, high-pressure diesel will form pressure fluctuations in the tube, the pressure wave transfer in the tube takes a certain time, in order to ensure that the cylinder oil supply interval Angle is consistent, the oil supply is uniform, the diesel engine works smoothly, the length and diameter of high-pressure tubing are selected after calculation. Therefore, when the high-pressure tubing of a cylinder is damaged, the tubing with standard length and diameter should be replaced. In actual use, due to the lack of standard tubing, use other tubing instead of considering whether the length of the tubing and the diameter of the pipe are the same, so that the length of the tubing and the diameter of the pipe are very different, although it can be used in an emergency, but it will lead to changes in the oil supply Angle and the amount of oil supply of the cylinder in advance, resulting in uneven work of the whole machine, so in use must use standard high-pressure tubing.
The sealing condition of the valve pair should be checked regularly.
The injection pump works for a period of time, and by checking the sealing condition of the oil valve, the wear of the plunger and the working condition of the oil pump can be roughly judged, which is conducive to determining the repair and maintenance method. During the inspection, unscrew the high-pressure tubing joint of each cylinder and pump oil with the hand pump of the oil pump, so that there is oil flow out of the tubing joint at the top of the injection pump, which indicates that the oil valve seal is poor (of course, such as the oil valve spring is broken), such as the poor seal phenomenon of multiple cylinders, you should thoroughly debug and maintain the injection pump and replace the couple.
Replace the worn plunger and the oil outlet valve pair in time.
When it is found that the diesel engine is difficult to start, the power is reduced, and the fuel consumption is increased, when the injection pump and the injector are still not improved by adjusting the injection pump and the injection valve, the injection pump plunger and the oil valve should be removed and replaced in time, such as the plunger and the oil valve are worn to a certain extent. The diesel engine starting difficulty, fuel consumption increase, lack of power and other losses caused by the wear of the coupling far exceed the cost of replacing the coupling, and the power and economy of the diesel engine will be significantly changed after the replacement, so it is necessary to replace the wearing coupling in time.
