Why the diesel generator set will suddenly stall

Diesel generator sets suddenly stalled during operation, will greatly affect the output efficiency of the unit, serious will also delay the process of production, bringing huge economic losses, so what is the reason for the diesel generator set suddenly stalled?

A. automatic flameout occurs when the speed gradually reduces the sound of diesel generator operation and exhaust smoke color is not abnormal phenomenon.

The main reason is that the diesel fuel inside the tank is used up, may be the fuel tank switch open.

Or the tank vent, fuel filter and fuel pump is blocked.

Or the oil circuit is not sealed into the air, resulting in "air resistance" (before the flameout accompanied by unstable speed phenomenon) this time to check the low-pressure oil circuit, first check the fuel tank, filter, fuel tank switch, fuel pump is not blocked, lack of oil or switch is not open, etc., and then loosen the air screw on the injection pump, press the fuel pump button, observe If there is no oil flowing out, the oil circuit is blocked, and if there are bubbles in the oil flowing out, there is air in the oil circuit, so check and exclude it section by section.

B. When the automatic flameout, the operation is continuously unstable, and there is an abnormal knocking sound.

The main reason is that the piston pin is broken, the crankshaft is broken, the connecting rod bolt is broken or loosened, the valve catch spring, the valve locking piece is off, the valve rod or valve spring is broken, causing the valve to fall off, etc.

Diesel generator operation once found when the unit appears in this condition, to immediately stop to check, so as not to cause a major mechanical accident, can be sent to a professional repair point to do a comprehensive inspection.

C. diesel generator automatic flameout, the speed will slowly reduce, unstable operation, white smoke from the exhaust pipe

The main reason is that there is water inside the diesel, cylinder gasket damage, or automatic decompression is damaged. Need to replace the cylinder gasket, adjust the decompression mechanism.

D. There is no abnormality before the automatic flameout, then suddenly flameout.

The main reason is that the plunger or injector needle valve is stuck, the plunger spring or pressure spring is broken, the injection pump manipulation tie rod and its connected pin fall off, the injection pump drive shaft and the active disc after the fixed bolt is loosened, the key on the shaft is sheared flat due to looseness, resulting in the drive shaft or active disc sliding, so that the drive shaft can not drive the injection pump work.

The above four points are a few common reasons for diesel generator set stalling, users need to be based on different situations, the corresponding reasons for the investigation, as soon as possible to eliminate the unit failure, to promote the normal work of the unit.