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Common faults and maintenance of hydraulic power unit

Common faults and maintenance of hydraulic power unit

Nowadays, the application range of hydraulic power unit is getting wider and wider. In practical application, the working performance of hydraulic power unit often directly affects the running state of the whole system. Therefore, we need to take certain measures to ensure its flexible operation during use.

For various abnormal problems encountered during use, the cause of the problem should be analyzed in time, and solutions should be found. For example, if it is found that the motor of the hydraulic power unit does not rotate, or is reversed, it is necessary to check the wiring problem. If it is reversed, it can be solved by transposing the wires.

Another common situation is that during the operation of the hydraulic power unit, the motor can be started normally, but the oil cylinder does not rise or does not rise or stops erratically.

Why is there such a situation? The reason can be considered from six aspects:

1. The hydraulic oil in the fuel tank is not in place, and the oil is added to the position 30 to 50 mm away from the oil port as required;

2. If there is gas in the oil cylinder or oil pipe, remove the oil pipe and then install it;

3. The wiring of the reversing valve wire is wrong, causing the reversing valve to fail to achieve the application function, and the oil returns from the reversing valve to the fuel tank. It is necessary to check whether the wiring of the reversing valve is correct;

4. The pressure regulation of the pressure regulating valve is too small. At this time, it should be increased first, and then adjusted to a suitable pressure;

5. The reversing valve or manual valve is not closed, remove it for cleaning or replacement; 6. The seal of the oil outlet of the gear pump of the power unit is damaged, remove and replace the seal.

Post time: Jun-27-2022