The fuel injection pump is an important component of the diesel generator fuel supply system, and its working condition directly affects the power, economy, and reliability of the diesel generator. Proper maintenance is an important prerequisite for ensuring the normal operation of fuel injection pumps and extending their service life. The following "Ten Elements" teach you how to maintain the fuel injection pump of a diesel generator:
1, Properly maintain the accessories of the fuel injection pump.
The side cover of the pump body, oil dipstick, oil filling plug (respirator), oil overflow valve, oil pool screw plug, oil level screw, oil pump fixing bolt, etc., must be ensured to be intact and undamaged. These accessories play a crucial role in the operation of the fuel injection pump. The side cover can prevent the invasion of impurities such as dust and water, the respirator (with a filter) can effectively prevent oil deterioration, and the oil overflow valve ensures that the fuel system has a certain pressure and does not enter the air. Therefore, it is necessary to strengthen the maintenance of these accessories and promptly repair or replace them if any damage or loss is found.
2, Regularly check whether the amount and quality of oil in the fuel injection pump oil pool meet the requirements.
Before starting the diesel generator, the amount and quality of oil in the fuel injection pump should be checked (except for fuel injection pumps that rely on engine forced lubrication) to ensure that the oil quantity is sufficient and the quality is good. If the oil deteriorates due to mixing with water or diesel, it may cause early wear of the plunger and outlet valve components, resulting in insufficient diesel power, difficult starting, and in severe cases, corrosion and rust of the plunger and outlet valve components. Due to internal leakage of the oil pump, poor operation of the oil outlet valve, wear and tear of the oil transfer pump tappet and housing, and damage to the sealing ring, diesel oil can leak into the oil pool and dilute the oil. Therefore, it is necessary to replace the oil in a timely manner according to the quality of the oil. When replacing, the oil pool should be thoroughly cleaned to remove impurities such as oil sludge at the bottom of the oil pool, otherwise the oil will deteriorate again after not being used for a long time. The amount of engine oil should not be too much or too little. Adding too much oil to the governor can easily cause the diesel engine to "spin". Adding too little oil will also result in poor lubrication. The oil dipstick or oil level screw should be used as the standard. In addition, when the diesel engine is not used for a long time, it is necessary to check whether there are impurities such as water and diesel in the oil pool of the oil pump. If there are any, they should be replaced immediately. Otherwise, due to long-term storage, moisture can easily cause the plunger and oil outlet valve components to rust and get stuck, leading to scrapping.
3, Regularly check and adjust the fuel supply of each cylinder of the fuel injection pump.
Due to the wear and tear of the plunger and oil outlet valve components, diesel internal leakage can cause a decrease or uneven fuel supply to each cylinder, resulting in difficulty starting, insufficient power, increased fuel consumption, and unstable operation of the diesel engine. Therefore, it is necessary to regularly check and adjust the fuel supply of each cylinder of the fuel injection pump to ensure the full performance of the diesel engine power. In practical use, the fuel supply of each cylinder can be determined by observing the exhaust smoke of the diesel generator, listening to the engine sound, and touching the exhaust manifold temperature.