Repair of diesel generator sets can be divided into minor repairs, medium repairs and overhauls. The minor repair and medium repair cycles are relatively short and the overhaul cycle is relatively long. When special circumstances occur in the diesel generator set, the customer should revise the unit in advance. If the following situations occur, the diesel generator set should be serviced:
1. the assembly is unable to operate, and the speed is large after acceleration, instability, abrupt changes in sound, and black smoke from the exhaust.
2. It is difficult to start the diesel engine of the generator set at normal temperature. During operation, the crankshaft bearing, connecting rod bearing and piston pin make knocking noises.
3. When the temperature of the diesel engine of the generator set is normal, the pressuresion of the cylinder does not reach 70% of the specified pressure.
4. The fuel consumption of the diesel engine of the generator increases significantly, and the phenomenon is black smoke.
5. The internal cylinder liner and piston ring of the generator set diesel engine are seriously worn, the ovality of the cylinder, the taper, the gap between the piston and the cylinder, and the ovality of the journal and connection of the crankshaft. The rod journal exceeds the specified limit.