Identification of diesel engine by three methods

According to the experience of some technicians and veteran technicians, the old and new levels of old diesel engines can be identified, and the methods of "asking", "two looking", "three tests" and "taking tests as the main method" can be adopted.

Q: that is to ask the diesel engine purchase time, use and sale reasons, repair and replacement of the major parts and components, the use of some of the problems, in order to have a more comprehensive understanding of the aircraft.

Two see: the first is to see whether the model is out of type, and then look at the appearance of the diesel engine from the old and new, and finally check whether the components are complete, whether or not damaged.

Three test: that is the test machine, the specific steps are:

1. under the sway of flywheel, such as no sound, no shaking, that gap has little crankshaft and bearing; rotating flywheel, such as no clicks between the crankshaft and connecting rod bearing wear is not serious.

The 2. cylinder crankshaft crank, when the demolition of decompression, decompression, such as the big rebound, rapidly rotating flywheel, illustrate the extent of wear small cylinder liner, piston, piston ring. At this point, the oil pressure meter readings should be no less than 1, or the oil pressure indicates that the red buoy will soon rise, and the hand pressure buoy should be strenuous.

3., starting diesel engine is relatively easy, exhaust colorless or light gray, steady speed, no noise, it shows that the diesel engine in good state of technology.

4. rotate the crankshaft, the fuel injection pump, fuel injection nozzle such as sound ringing, indicating piston pair and nozzle performance is good; if the gear chamber of the abnormal sound, indicating the gear wear is not serious

Through the above methods, generally can distinguish the advantages and disadvantages of the old diesel engine. In this way, the price of the old diesel engine is more accurate.