How to evaluate the quotation of second-hand generator sets

After summarizing years of unit experience, generator manufacturers have also summarized some reliable methods for estimating the price of second-hand diesel generator sets. The following diesel generator manufacturers will share this method with everyone. The method can adopt the method of first asking, second looking, and third testing, with testing as the main method. First question: It is to ask about the purchase time, purpose and reason of sale of the diesel generator set, the repair status and the main parts that have been replaced, and what problems there are in use, etc., so as to have a more comprehensive understanding of the machine. The second inspection is to see whether the model is an obsolete model, and then look at the condition of the diesel generator set from the outside, and check whether the parts are complete and whether there is any damage. Third test: Test the machine. The specific steps are: 1. Shake the flywheel up and down. If there is no sound or obvious shaking, it means that the gap between the crankshaft main journal and the bearing bush is not large; turn the flywheel. If there is no clicking sound, it means that the crankshaft connecting rod shaft The wear between the neck and the connecting rod shoe is not serious. 2. Decompress the cylinder and crank the crankshaft. When the decompression is removed, if the rebound force of the piston is large and the flywheel rotates rapidly, it means that the wear of the cylinder liner, piston and piston ring is small. At this time, the oil pressure gauge reading should be no less than 1 or the red oil pressure indicator float can rise quickly, and it should be laborious to press the float by hand. 3. It is easier to start the diesel generator set. If the exhaust is colorless or light gray, the speed is stable, and there is no noise, it means the diesel generator set is in good technical condition. 4. Rotate the crankshaft to make the fuel injection pump supply oil. If the fuel injection nozzle emits a crisp fuel injection sound, it means that the performance of the plunger pair and the fuel injection nozzle is good; if there is no abnormal sound in the gear chamber, it means that the wear of the gear is not serious. Use the above method. , generally can distinguish the quality of second-hand diesel generator sets. In this way, the price of the second-hand diesel generator will be more accurate.