How to solve the problem of slow fuel dispensers?

When slow fuel dispensers occur, how to perform troubleshooting and maintenance promptly and effectively, ensuring the normal operation of the fuel dispenser has become an issue that requires in-depth discussion.



  • The dispenser turns on and off normally.
  • The metering of the tanker is normal.
  • The oil output is slow and the flow rate does not exceed 20~30L.
  • Adjusting the relief valve is ineffective.
  • Some machines vibrate greatly.

fuel station


1. Check whether the oil bottom valve is flexible.

If impurities enter the oil bottom valve or the bottom valve rotates inflexibly or is stuck, it may cause the oil pump to discharge oil slowly. In this case, the only way to replace the foot valve is to replace it.

2. Check whether the oil line of the oil tanker has a “bent” shape or high and low fluctuations.

At the highest point of the “bend” feature in the pipe, there is often oil and gas (because gas is less dense than oil), and it is difficult for a tanker to completely vent the gas in such a pipe because there is some gas in the pipe, which The flow cross-section of the drained oil circuit will be reduced, resulting in a slow speed of the tanker. If this happens during the summer, it may prevent the tanker from stimulating

3. Check whether the fuel pipe of the tanker is too long.

The standard distance between the tanker and the oil tank is 30m, and the longest distance should not exceed 50m. If the pipeline is too long, the oil dispenser will be slow to produce oil or even no oil will be produced, and the machine will vibrate greatly.

4. Check whether the filter is clogged.

Inside the tanker, there are at least three filtering devices. If any of the filters are clogged, it may cause the distributor to drain oil slowly and the machine to vibrate a lot. Some people often neglect cleaning 1 or 2 filters, causing the oil dispenser to refuel slowly or not produce oil.

5. Check whether the oil pump relief valve is normal.

The normal working state of the relief valve is that it is sealed when it is first started. When the pressure of the hydraulic system reaches a certain pressure, the relief valve will automatically open. If the relief valve does not seal when it should, it will cause the oil pump to discharge oil slowly. It will cause the oil pump to be unable to form negative pressure and the oil dispenser will not produce oil.

6. Check whether the oil outlet valve (or high-pressure valve or balance valve) can be opened flexibly.

Suppose there is foreign matter in the oil delivery valve. In that case, it will cause the oil delivery valve to open and close poorly, resulting in slow oil delivery or unstable flow of the tanker. The oil delivery valve needs to be cleaned.

7. Check whether the belt is normal.

If the belt is too loose or aged, it will cause the belt to slip when the motor rotates, the oil pump speed will be low, and the oil dispenser will slowly discharge oil.

8. Check whether the solenoid valve is normal.

The solenoid valve controls the size and flow of the refueling machine, and its function is to improve the accuracy of preset refueling. If impurities enter, it may cause the oil dispenser to discharge oil at a large flow rate slowly, or even slowly discharge oil at a small flow rate or even no oil is discharged. In this case, the machine often vibrates violently. The maintenance method is to clean or replace the solenoid valve.

9. Check whether the hose connector of the oil gun nozzle is blocked

The thinnest part of the hose connector of the oil gun nozzle may be clogged by a piece of rubber that has fallen off the inner wall of the hose, causing the oil nozzle to discharge oil slowly, but this is often overlooked.

In short, when slow fuel dispensers, we need to observe. We can always find the cause of the problem and find a way to solve it.

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