The normal operation of the construction machinery fuel pump is the key to ensuring the stable operation of the engine. Doing a good job in the maintenance of the fuel pump can not only improve the work efficiency of construction machinery but also effectively extend the service life of the fuel pump and reduce maintenance costs. The following details the maintenance points and tips for extending the service life of construction machinery fuel pumps.
I. Regularly Replace the Fuel Filter
- Importance: The fuel filter is like the "guardian" of the fuel pump, which can filter out impurities, moisture, and dirt in the fuel. If the fuel filter is not replaced for a long time, these impurities will gradually accumulate, hindering the flow of fuel, increasing the working burden of the fuel pump, and leading to increased wear and even damage to the fuel pump. For example, in areas with high - sulfur fuel, the impurities in the fuel are more likely to cause damage to the fuel pump, and at this time, regularly replacing the fuel filter is particularly important.
- Replacement Cycle: Generally, the replacement cycle of the construction machinery fuel filter is every 500 - 1000 working hours. However, the specific replacement cycle should be adjusted according to the actual use situation. If the construction machinery often operates in harsh environments, such as in dusty construction sites or areas with poor fuel quality, the replacement cycle of the fuel filter should be appropriately shortened.
- Replacement Method: When replacing the fuel filter, first select a filter suitable for the construction machinery model. Then, during the replacement process, pay attention to closing the fuel valve first to avoid fuel leakage. After replacement, check whether the installation of the filter is firm and the sealing is good, and start the construction machinery to check whether the fuel system is working properly.
II. Keep the Fuel Clean
- Impact of Fuel Quality: Using clean and high - quality fuel is the basis for ensuring the normal operation of the fuel pump. Low - quality fuel may contain more impurities, moisture, and additives, and these substances will corrode and wear the internal components of the fuel pump. For example, moisture in the fuel will cause metal parts to rust, affecting the performance and service life of the fuel pump.
- Refueling Precautions: When refueling construction machinery, choose regular gas stations to avoid adding low - quality fuel. At the same time, pay attention to the cleanliness of the refueling environment and prevent dust, impurities, etc. from entering the fuel tank. Before refueling, it is best to clean the area around the fuel tank filler first to ensure the cleanliness of the refueling process.
- Use of Fuel Additives: Appropriate use of fuel additives can help clean the fuel system, reduce the generation of carbon deposits and impurities, and protect the fuel pump. However, pay attention to choosing reliable fuel additives and use them correctly according to the instructions to avoid damaging the fuel pump due to improper use.
III. Check and Maintain the Installation of the Fuel Pump
- Inspection of Installation Firmness: Regularly check whether the installation of the fuel pump is firm and whether each connection part is loose. During the operation of construction machinery, due to vibration, bumps, etc., the installation bolts of the fuel pump may become loose. Once the fuel pump is not installed firmly, it will vibrate during operation, which not only affects the normal operation of the fuel pump but also may cause the fuel pump to collide with surrounding parts and cause damage.
- Adjustment of Installation Position: Ensure that the installation position of the fuel pump is correct to avoid affecting the oil suction and oil supply effects of the fuel pump due to improper installation position. For example, the inlet of the fuel pump should be lower than the lowest fuel level in the fuel tank to ensure that the fuel pump can smoothly suck in fuel. If it is found that the installation position of the fuel pump has a deviation, adjust it in a timely manner.
- Inspection of Connection Pipelines: Check whether the connection pipelines between the fuel pump, the fuel tank, and the engine have cracks, aging, looseness, etc. For cracked or aged pipelines, replace them in a timely manner; for loose joints, re - tighten them. Whether the connection pipelines are normal is directly related to whether
