Rotate the crankshaft to supply fuel from the fuel injector . If the fuel injector emits a crisp sound, it indicates that the performance of the fuel injector and the plunger pair is still good; if there is no abnormal noise such as " whipping " in the wheel chamber , it indicates that the gear wear is not serious. Pull the flywheel up and down, if there is no noise, it indicates that the gap between the crankshaft main shaft and the bearing bush is not large. Flywheel turn pull the piston approaches the bottom dead center, and from side to side of the flywheel, without " da da " sound, indicating a link between the wear shoe with a stem is not serious. Decompress the cylinder and sway the crankshaft. When the decompression is removed, if the rebound force of the piston is large, the flywheel rotates rapidly, indicating that the degree of wear of the cylinder, piston, and piston ring is small. When cranking the crankshaft, the pointer of the oil pressure gauge should be no less than 1 or the red mark of the oil instruction can rise quickly, and the hand pressure should be laborious. Start the machine. If it is easy to start, the exhaust is colorless or light gray, and the speed is stable and no noise, it shows that the technical condition of the old diesel engine is good. Remarks: During the testing process of diesel generator set, it is best to operate and track changes in data such as air pressure and oil pressure in the diesel generator controller . Therefore, the stability of the quality of the diesel generator controller and the humanization of the design are very demanding.
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