Farmers in the purchase of old diesel engines, the following methods to identify, generally can buy a more satisfactory diesel engine.

1, rotate the crankshaft, the oil pump, such as fuel injection nozzle issued crisp sound, indicating the plunger and the nozzle performance is still good, such as gear chamber without abnormal sound that gear wear is not serious.

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

3, the cylinder pressure, rotate the crankshaft, when lifting decompression, such as piston rebound is large, rapidly rotating flywheel, it indicates that the degree of less wear cylinder sleeve, a piston and a piston ring, which is reading should be not less than 1Mpa or the oil pressure indicator red buoy can quickly rise the oil pressure gauge, pressure should be laborious hand buoy.

4, start the diesel engine is relatively easy, exhaust colorless or light gray, stable speed, no noise, indicating that the diesel engine in good technical condition.