Tractor smoke abnormal fault causes and troubleshooting methods?

Tractor smoke abnormal fault causes and troubleshooting methods:

Tractor engine smoke abnormalities are common failures, such as timely exclusion, will become more and more serious, which not only affects the engine power, but also affects the economy and reliability, but also cause serious pollution of the atmosphere.

One, the reasons for the emission of white smoke and exclusion method

Engine exhaust gray-white exhaust, that part of the fuel due to low temperature, poor atomization of oil and gas, fuel can not be burned in time to exclude from the exhaust pipe, the reasons for this phenomenon and exclusion methods are as follows: (1) the injection time is too late, the injector spraying with a drip. Injector pressure is too low, poor atomization, in the machine temperature is too low to burn in the form of white smoke is discharged. Treatment is to correct the injection time, check and adjust the injection time conditions. (2) cylinder pressure is insufficient, due to cylinder liner, piston ring set up wear, as well as poor valve sealing, caused by the engine just started white smoke, and then with the rise in cumulative temperature, into light black smoke or black smoke, the treatment method is to replace the worn cylinder liner, piston ring or correct the valve, valve seat ring. (3) water in diesel fuel, such as the engine after starting gray smoke, with the rise in cumulative temperature gray smoke still exists, it may be diesel fuel water, the treatment method is, every day before the start of the tank drain valve open, the sediment and water exclusion.

Second, the reasons for the emission of blue smoke and elimination methods

The reason for the emission of blue smoke is that the combustion chamber has an excessive amount of oil in the combustion caused. The reasons for this phenomenon and elimination methods are as follows: (1) the oil sump with excessive oil, too much oil, with the high-speed operation of the crankshaft splash to the cylinder wall, and run into the combustion chamber. The method of elimination is to stop the machine for about 10 minutes, check the oil scale, the excessive oil exclusion. (2) Cylinder liner, piston ring assembly wear is serious, the clearance is too large. The result will cause a large amount of oil to run into the combustion chamber combustion, accompanied by increased crankcase exhaust gas. The way to deal with this is to replace the worn parts in time. (3) Piston ring loss of function. If the piston ring elasticity is insufficient, by the carbon stuck in the ring groove, or ring mouth in the same straight line, or the oil ring back to the oil hole blockage, will lead to oil into the combustion chamber combustion, the phenomenon of blue smoke emissions. The way to deal with this is to remove the piston ring, remove the carbon, rearrange the ring buckle, and replace the assembly if necessary. (4) Excessive valve and catheter clearance. Oil in the rocker arm chamber during air intake enters the combustion chamber in large quantities and burns. The way to deal with this is to replace the worn valves and ducts in time. (5) the reasons for the emission of blue smoke, such as oil is too thin, oil pressure is too high, the engine is not well broken in, will cause oil combustion and blue smoke. Import pump Valve

Three, the reasons for the emission of black smoke and elimination methods

The phenomenon is due to incomplete combustion of fuel and produce. Black smoke, often accompanied by a decline in engine power, exhaust gas temperature is too high, the water temperature is too high, which leads to wear and tear of several parts of the engine, affecting the engine life. The causes of this phenomenon and elimination methods are as follows: (1) insufficient intake air or intake pipe blockage. In order to find out the cause should be the following checks: whether the air filter is blocked; whether the intake pipe is leaking; whether the turbocharger is damaged. (2) Improperly adjusted valve lash valve seal ring with poor contact. The valve lash, valve spring and valve seal ring band should be checked. (3) Uneven or excessive supply to each cylinder of the high-pressure oil pump. Resulting in unstable speed, intermittent black smoke, should be adjusted to make it balanced or within the prescribed range. (4) The injection is too late, the injection advance angle should be adjusted. (5) Injector work or damage, should be removed for maintenance. (6) Cylinder liner, piston ring assembly wear serious. When this occurs, the piston ring seal is not tight, the cylinder air pressure drops, resulting in the diesel engine can not be fully combusted and black smoke, and the engine power drops drastically, and in severe cases in the load, the engine will automatically stall. Wear parts should be replaced.

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