1. The diesel engine runs when the engine oil is insufficient

At this time, due to insufficient oil supply, the oil supply to the surfaces of each friction pair will be insufficient, resulting in abnormal wear or burns.

2. Shut down suddenly with load or stop immediately after unloading the load suddenly

After the diesel engine generator is turned off, the circulation of the cooling system water stops, the heat dissipation capacity decreases sharply, and the heated parts lose cooling, which will easily cause the cylinder head, cylinder liner, cylinder block and other parts to overheat, cause cracks, or cause the piston to over-expand and get stuck in the cylinder liner. Inside.

3. Running under load without warming up after cold start

When the diesel generator is started cold, due to the high viscosity and poor fluidity of the oil, the oil supply of the oil pump is insufficient, and the friction surface of the machine is poorly lubricated due to lack of oil, resulting in rapid wear, and even failures such as cylinder pulling and tile burning.

4. After the diesel engine is cold-started, the throttle is slammed

If the throttle is slammed, the speed of the diesel generator will increase sharply, which will cause some friction surfaces on the machine to be severely worn due to dry friction. In addition, when the throttle is hit, the piston, connecting rod and crankshaft will undergo a large change in force, which will cause severe impact and easily damage the machine parts.

5. When the cooling water is insufficient or the temperature of cooling water and engine oil is too high

Insufficient cooling water of the diesel generator will reduce its cooling effect, and the diesel engine will overheat due to the lack of effective cooling and the overheated cooling water and high oil temperature of the engine oil will also cause the diesel engine to overheat.