In some special conditions (such as cold weather or dead battery) the diesel engine cannot start smoothly. But do you know the reason why the diesel engine cannot start smoothly? This article sorts out 6 common diesel engine failure problems for you. The end of the article, it also prepares you for how to start your diesel engine smoothly in an emergency.

6 types of malfunctions that cannot be started for diesel engines

  1. The filter element is clogged: the fuel used is not clean, the fine filter has not been replaced for a long time, or the coarse filter has not been cleaned for a long time, which will cause the fuel to be unable to be supplied normally and the diesel engine cannot be started. At this time, the fine filter and coarse filter should be replaced immediately.
  2. The oil circuit is not sealed: Due to the poor sealing of the oil circuit, after the diesel engine stops working for some time if the liquid level in the fuel tank is lower than the fuel pipe, the fuel in the fuel pipe will return to the fuel tank, causing the fuel to fail to be normal Supply so that the diesel engine cannot be started. This fault is easy to be found during the normal operation of the diesel engine and should be dealt with in time.
  3. The solenoid valve is damaged: if the solenoid valve is damaged and the frame cannot be restored to the oil supply position, the unit pump will always be in the flame-out position. In this regard, ignition can be achieved by removing the flameout solenoid valve; when flameout is required, manual flameout can be used. It should be noted that after removing the flameout solenoid valve, protective measures must be taken to prevent foreign objects from entering.
  4. The rack of the flameout solenoid valve is stuck and cannot be pulled back: Normally, when the flameout solenoid valve is energized, the rack should return to the fuel supply position. The simple way to check whether the rack is damaged is: to remove the flameout solenoid valve, use a screwdriver to move the rack to the rightmost position, which is the flameout position, hold it for 1 minute and then loosen it. If the rack returns, it means that the rack is OK, otherwise, There is a problem with the rack. At this time, add some oil for lubrication, and the diesel engine can be started after returning to the position; if it still does not work, you need to ask a professional to repair it.
  5. Unit pump wear: Take the Deutz 1013 diesel engine as an example. It only has 6 unit pumps for fuel supply. Due to the long use time, the unit pump plunger and even parts are worn out, and the pressure drop will cause fuel atomization. If it is not good, it will cause the diesel engine to fail to start. Especially in winter. Check if there is any problem with the unit pump. You can loosen a high-pressure fuel pipe between the unit pump and the fuel injector and then start the diesel engine. If there is fuel flowing out, the unit pump has a problem. The emergency method to deal with this problem is to use a starter fluid, which has obvious effects, but it cannot be used for a long time and should be replaced by professionals in time.
  6. Poor fuel quality: Poor fuel quality can also cause the diesel engine to fail to start. Due to the high wax content and impurities in the fuel produced by small refineries, the fuel is not easy to burn, and a layer of wax will form on the surface of the fuel when the temperature is low. Therefore, the diesel engine must use -10# or higher diesel oil in winter, and the fuel must be produced by a formal enterprise

What we should do before the accident?

To deal with the unexpected situation that the diesel engine cannot start, the best way is to prepare a Plan B for the smooth start of the diesel engine. I will introduce a kind of starting device called the best diesel engine starting emergency plan-spring starter.

Spring starters are also called spring starters, spring motors, and spring energy storage starters. It is a starter with a disc spring as the energy storage medium. It only uses human rotation to compress the spring, and then instantly releases torque and speed to the diesel flywheel to start the engine without energy consumption and emission pollution.

It is installed on the diesel engine in a standard way, without the need for batteries, compressed air tanks, or hydraulic drives, as well as control valves, cables, etc.

The spring starter adopts a cavity and transmission mechanism made of a special alloy. The unique and concise structural design prevents sparks or radiation during use. It has a firm and reliable structural performance and is suitable for spark-sensitive or difficult-to-implement equipment maintenance. occasion.

Although the spring starter is small, it has a very powerful energy. Cqstart’s spring starter is suitable for diesel engines with a displacement of 2-50L. No matter under any conditions, your engine can be guaranteed to start smoothly. If you want to learn more about spring starters. You can contact us and we will do our best to help you.