Ask about the old diesel engine acquisition time, use and reasons for the sale, ask about the past repairs, what major parts have been replaced, ask what the problem is in use, so that the old diesel engine has a more comprehensive understanding of the system. Second look, look at the old diesel engine signs and appearance. Look at which factory production, when the factory, distance existing for how long; look at the appearance of paint is peeling off, the Ministry of whether the defect, the model is eliminated and so on.
Judging the old diesel engine's old and new degree from the sign and the appearance. Three tries, carries on the test machine. The old diesel engine is inspected carefully by rocking the crankshaft, flipping the flywheel and starter.
The test machine is a very important step, the specific inspection steps are as follows:
1. Shake the crankshaft so that the nozzle is supplied with oil.
If the nozzle issued a crisp sound, the nozzle and plunger pair performance is good, such as the wheel room without "wow" and other abnormal sound, it shows that the gear wear is not serious.
2. Flip the flywheel up and down, such as no noise, indicating the gap between the spindle stem and the bush is not big.
3. Turn the flywheel, so that the piston close to the next stop point, and then sway the flywheel around, such as no "Da Da" sound, indicating that the rod shaft between the stem and tile wear is not serious.
4. The cylinder decompression, shake the crankshaft, when the removal of decompression, such as the piston rebound force, the flywheel rapid rotation, indicating the cylinder, piston, piston ring wear less. When shaking the crankshaft, the oil pressure gauge should be no less than 1 or oil instructions red mark can quickly rise, under pressure should be laborious.
5. Starter Machine. If easy to start, smoke colorless or light gray, stable speed without noise, indicating that the old diesel engine technical situation is good.
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