What Helps Quiet a Whining Hydraulic Pump?

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Hydraulic pumps refer to mechanical devices that move or displace liquid to convert mechanical energy into hydraulic energy. Hydraulic pumps can develop operational problems that can lead to a discernible whining noise, which may indicate a serious system problem. Fortunately, this noise can be quieted via a few simple troubleshooting techniques.

Relief Valve Check

  • Hydraulic pumps typically include a relief valve, or valve that opens and closes to control the pressure in a hydraulic system. Oil buildup or other sediment in the relief valve can hamper its ability to close properly, thereby enabling higher pressure to pass through the system, resulting in a whistling noise. Cleaning the relief valve with a damp cloth typically corrects the problem.

Intake Restriction

  • Foil, flashing or other objects lodged in the hydraulic pump’s inlet, or opening that allows hydraulic fluid into the pump, can restrict the pump’s intake and result in a whining noise. Cleaning out or removing any obstructions at the pump’s inlet should eliminate the whining.

Oil Moisture

  • Leaks in one or multiple hydraulic lines can allow air or moisture to mix with hydraulic oil. This added air can result in a high-pitched whine while the hydraulic pump is in operation. Replacing the damaged lines should resolve the whining issue and restore optimum function to the pump.

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  • Photo Credit hydraulic machine image by Heng kong Chen from Fotolia.com
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