The fuel dispenser starts normally, but the nozzle does not dispense fuel. Are you also troubled and don’t know the cause? If something goes wrong and you can’t find a solution, you can take a look here. If you are also troubled by the following problems, try to solve them. However, I also remind everyone that if it involves professional operations that you don’t understand well, it is better to ask relevant professionals to operate them.
The motor rotates in reverse or the transmission V-belt is loose or broken.
1. Adjust the power phase sequence and swap any two live wires of the fuel tanker power switch;
2. Adjust the tension wheel or replace the V-belt.
Oil-gas separator failure
1. The filter of the fuel dispenser is seriously clogged. The filter should be cleaned to remove debris;
2. The oil discharge valve of the oil and gas separator is stuck and cannot be opened, causing the fuel dispenser to not discharge oil. During maintenance,
the oil outlet valve should be removed, cleared of debris, and then reassembled so that it can move up and down freely.
3. The float of the oil and gas separator enters the oil or falls off, causing the high pressure to be unable to form in the high-pressure chamber,
and also causing the fuel dispenser to not discharge oil. Disassemble the upper cover gasket of the oil and gas separator, take out the oil float,
replace it with a new one, and reinstall the oil float.
4. The upper cover pressure pad of the oil and gas separator is damaged, causing the high-pressure chamber to communicate with the normal pressure chamber, causing high pressure to form in the high-pressure chamber and preventing the fuel dispenser from discharging oil. Solution: Smooth the joint between the upper cover and the cavity with sandpaper, replace the upper cover pressure pad with a new one, and tighten the screws diagonally evenly.
5. The filter pad or spring seat pad of the oil and gas separator is damaged. Solution: Replace the damaged gasket;
6. The cone valve of the oil and gas separator is not closed tightly.
Solution: Remove the oil outlet valve, remove debris, and reinstall it so that it can move up and down freely; stretch the spring to increase its elasticity.
Vane pump failure
1 .The vane pump relief valve cannot be closed
2. Because foreign matter (broken shrapnel, etc.) is stuck between the valve core and the valve seat of the overflow valve, the oil always circulates internally in the pump and cannot flow out. During maintenance, the valve core should be removed and the foreign matter in the valve seat should be removed;
3 . Since the vanes and shrapnel in the pump run at high speed with the rotor for a long time, they will wear and break due to fatigue, causing the internal leakage of the vane pump to increase. In severe cases, it may even lose its oil-pumping function. During maintenance, debris and damaged vanes in the pump should be removed. , shrapnel, replace with new ones, and then reinstall;
4 .If the pump pad at the joint surface of the vane pump and the oil-gas separator is broken down or installed backward, it can also cause the high-pressure chamber and low-pressure chamber of the vane pump to be connected, causing the vane pump to lose its oil discharge function;
The vane pump rotor and rotor shaft are loose, causing the pump shaft to idle. At this time, the rotor or vane pump needs to be replaced for maintenance.
There may be many reasons why the fuel dispenser starts normally but the nozzle does not discharge oil. It needs to be carefully checked and investigated one by one. According to the information provided in the article, the above are some solutions that may cause the nozzle to not produce oil. I hope it can help you.