[Hydraulic knowledge] 10 reasons for the noise of hydraulic oil pumps and solutions

As one of the core power components of the hydraulic system, the hydraulic oil pump will immediately affect the normal operation of the hydraulic system once it fails. Noise is a common failure of hydraulic oil pumps during use, so how to quickly detect and eliminate it?

Fuel tank problem

1. The oil level of the fuel tank is too low: This can be seen through the hydraulic gauge, just add oil directly to the oil level line.

2. The viscosity of the oil is too high: This requires us to check the oil quality and select the viscosity of the oil according to the requirements.

3. The filter or oil suction pipe is blocked: as long as the filter element or oil suction pipe is cleaned and replaced with new parts, it can be solved.

4. The air hole of the fuel tank is blocked: only need to clean the air hole, the probability of this problem is very small.

5. The seal is not tight: check the sealing of the connection between the hydraulic oil pump and the oil suction pipe and the joint surface, and tighten it.

Oil pump problem

6. The oil pump sucks air: This problem is relatively common in newly installed oil pumps. We need to perform no-load operation first to remove the air.

7. The channel of the suction chamber of the oil pump is not smooth: at this time, we need to remove the pump and perform cleaning and inspection.

8. The internal parts of the bearing are severely worn: this is caused by long-term use or improper use. We need to disassemble the pump for repair or replacement.

Installation and use problems

9. Serious oil trapping: this can only improve the design and improve the unloading capacity.

10. Poor installation of the hydraulic pump: Poor coaxiality between the pump and the motor will cause abnormal noise. We must reinstall the pump to meet the technical requirements. 

The above is the method of rapid detection and elimination of noise and abnormal noise in the hydraulic oil pump.