The main faults that affect the diesel engine can not work are mainly due to the failure of the oil supply system to supply oil. The fault mainly lies in the interruption of the oil supply, that is, the obstruction of the oil supply circuit, mainly the “air resistance”, “water resistance” and “water resistance” “Material resistance”, collectively known as “three resistance”. And “resistance” can be divided into “foreign body blocking” and “ice resistance” two cases, “ice resistance” mainly occurs in the northern cold season, and “foreign body blocking” is relatively rare. People to exclude the “three resistance” as the basic operation of troubleshooting, as long as no “three resistance”, fuel supply, diesel engine will be able to work. So the exclusion of “three resistance” is very important.

To determine whether the diesel engine “three resistance”, the best way to check from the Baotou North Mercedes-Benz accessories fuel injection pump at the opening of all high-pressure tubing, a person playing the engine to drive diesel and fuel pump operation, a person to observe the high-pressure pump out of the valve Of the oil situation, you can easily distinguish between the three blocked plug situation.

If you can normally open the oil and open the engine before the work is unstable, you can determine the “water resistance”, mainly in the diesel water too much to make the engine work is not stable or can not work; if a large number of bubbles and open before the engine can not work Or work very unstable, can be judged as “air resistance”, mainly because there is “gas” exists so that the engine can not work; if no oil or oil is rare when a “foreign matter blocked” in the winter can be judged For the “ice resistance”, mainly foreign matter or ice clogged into the oil pipeline, so that the engine is unstable or can not work.

(1) Air resistance and exclusion methods. When the oil valve to take the bubble, to determine the engine fuel supply air resistance occurs, you can continue to play the motive, until the pipeline in the air row so far, indicating that the pipeline is not damaged, the engine can work properly. If the process of playing in the motive, there is always a gas discharge, that is, where the oil pipeline leak. Elimination of air resistance is to find the leak site, do a good job to eliminate leakage, and then remove the air in the system.

If the gas in the oil line is due to the weather is very hot and low pressure, so that the fuel molecules evaporate the formation of fuel vapor and block the pipeline, this is a special case, people called high temperature resistance, then another matter The

(2) resistance and exclusion method. When the check out the oil valve, found no oil or less oil, you can determine the resistance. Check the parts of the resistance, the method can be used to continue to check the pump, when pulling the handle when the pump handle a lot of resistance, you can focus on checking from the fuel tank to the oil pump between the pipeline, the plug may be fuel tank fuel The inlet of the pipe, the foreign matter in the fuel tank clogs the inlet port, the plugging part may be the fuel filter, the impurities in the fuel or the glue will clog the filter; if the hand pump feels the resistance, Focus on checking the fuel line from the hand pump to the high pressure pump, the clogging site may occur in the fuel fine filter.

Check the centrifugal oil fine filter work is normal way is to suspend the engine when the diesel engine to continue to rotate when the “buzzing” sound. If the longer duration is working properly sound, such as hear the sound of rotation, that is, a failure occurred.

Check the ice resistance when it must be in the cold winter, suspected diesel in the water. Ice resistance occurred in the pipeline and pipe joints, the situation is more complex, warm lines, melting ice. Pipeline naturally smooth, do not have to find the exact location of icing.

When the exclusion of resistance, should also thoroughly clean the fuel supply system, and even clean the fuel tank. In order to prevent resistance, fuel tank should pay attention to long-term filling clean fuel, but it is not easy.

(3) water resistance and exclusion methods. When the diesel engine is not stable enough to run, there is a fire phenomenon, even in the course of a sudden shutdown, you can determine the phenomenon of diesel engine congestion; observe the exhaust pipe will find the exhaust continued to smoke white smoke, you can receive from the exhaust pipe or Dripping more generally can determine the diesel engine water resistance failure.

Water resistance for the fuel supply system in the presence of water, fuel tank in the water, especially the bottom of the water may be a lot. Such as the confirmation of the occurrence of water resistance, the fuel tank should be the bottom of the water and fuel release, continue to play the engine to start the engine to see if the water resistance can be ruled out; if not ruled out, should let go of all the remaining fuel, and thoroughly clean Baotou North Benz Accessories fuel tank and fuel supply, replace the fuel filter (core), and then pay attention to add anhydrous clean fuel, and remove the fuel system into the water may be.

Water resistance of the performance is more complex, and the combustion chamber leakage and other diesel engine difficult to distinguish. For example, the cylinder pad damage leak into the combustion chamber, the water is also discharged from the exhaust pipe, diesel engine work the same instability. According to the degree of leakage and the number of different cylinders, displacement is not the same; diesel engine work conditions are not the same. So to apply the experience, according to Baotou North Mercedes-Benz accessories engine use time, commonly used conditions, media consumption and many other factors to judge.