Why doesn't the automatic closing function of the fuel filler cap work?
In order to move forward to your case, could you please kindly help us confirm the following information?
1. Check if there is any foreign matter
2. Please check whether the fuel tank is higher than the oil gun. In this case, the oil gun will also produce oil.
3. When the quantitative refueling mode of the tanker is completed, the fuel supply system of the tanker will stop and the oil gun will not automatically close, so the oil gun needs to be closed manually.
If it still doesn't work, the sensor inside the refueling nozzle may be broken. We will send the refueling gun to you and could you please kindly contact us at support@brearo.com