What are the precautions for using a dual fuel tank switching valve?

[LeHadley]

Here are the specific precautions for using a dual fuel tank switching valve: 1. During winter startup: Use the diesel from the auxiliary fuel tank for supply. Only after the diesel in the main fuel tank has warmed up (typically when the engine coolant temperature reaches 60-70 degrees) and the wax at the fuel suction port has melted, can you press the switch to change the supply from the auxiliary fuel tank to the main fuel tank. At this point, the indicator light on the switch will illuminate, indicating that the engine is being supplied by the main fuel tank. 2. When parking for more than half an hour in winter: You must switch the diesel supply from the main fuel tank to the auxiliary fuel tank 2-3 minutes before turning off the vehicle's power. This ensures the fuel lines are filled with diesel, facilitating the next cold start. After switching, the indicator light on the switch will stop flashing and turn off, indicating that the engine is being supplied by the auxiliary fuel tank. At this point, you can turn off the vehicle's power. 3. If the switching valve was not changed to the auxiliary fuel tank before parking: If the vehicle cannot start after prolonged parking, you should heat the entire fuel line, including the engine's high-pressure fuel pump, diesel filter, and switching valve. Once the temperature rises, first switch to the auxiliary fuel tank position, then turn on the power. At this point, you can drive using the auxiliary fuel tank and switch back to the main fuel tank once the diesel meets the switching conditions.