What should I do if the lifting hydraulic cylinder and the tilting hydraulic cylinder of the electric hydraulic pallet truck move slowly

The hydraulic system is an important part of the electric hydraulic pallet truck. In the process of using the equipment, problems will inevitably occur in this part. Before understanding the example, we should roughly know that the hydraulic system includes The hydraulic system of the working device and the steering hydraulic system are divided into two parts. When checking the fault, it is necessary to eliminate the unreasonable factors in the design first, and then eliminate the factors that cause the failure of the descending speed limit valve and pipeline blockage based on experience.

After the engine speed of the electric hydraulic pallet truck is increased, the lifting hydraulic cylinder and the tilting hydraulic cylinder will move slowly. This is exacerbated as the engine revs increase, but the steering still works and the system can be heard humming regularly.

Then follow the steps to check item by item, so that you can find out whether there is any leakage in the electric pallet lift truck hydraulic cylinder. If there is an internal leak in the lifting hydraulic cylinder, hydraulic oil will flow out of the bleed plug. It is recommended to stick a metal rod close to the safety valve on the multi-way valve of the electric hydraulic pallet truck, and listen carefully for the sound of overflow. This can prove that insufficient oil pressure is not the main reason for the slow movement of the lifting hydraulic cylinder and the tilting hydraulic cylinder. . Touch the pump with your hand and feel the frequency of the vibration. If it changes according to the engine speed, we can easily hear the low sound of the pump. In this way, we can preliminarily determine whether the pump is faulty.

If the cause of the failure is analyzed from the perspective of insufficient flow, the main reason is that the pump is insufficient in oil supply. Based on the observations and the time the equipment has been used, we can confirm that the low pump speed in the electro-hydraulic pallet jack is not the cause of the malfunction. Therefore, the failure factor may be concentrated in the pump's insufficient oil suction.

According to this judgment, when we take out the oil suction pipe of the pump in the electric hydraulic pallet truck for inspection, it is easy to find that there are many filter meshes accumulated near the oil suction port of the pump. After cleaning the filter screen, re-install a new oil filter on the electric hydraulic pallet truck, and then test whether the equipment can resume normal operation.

The above is the solution to the slow movement of the lifting hydraulic cylinder and the tilting hydraulic cylinder in the electric hydraulic pallet truck.

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