Ever wonder what that noise in your hydraulic system is? Here are a few possibilities to consider:
- Cavitation. Check the pump for clogged or blocked air vents and intake lines. Follow manufacturer’s recommended viscosity for the pump.
- Dirty Filter. Periodically check all filters. Also match filter capacity to the pump.
- Pump is exceeding maximum rpm.
- System has air in it. Tighten suction line fittings to prevent air intake. Keep the reservoir full.( A tank is full at 90% of capacity)
- Pump parts are loose or worn.
- Fluid is contaminated. Check the quality of the fluid in your system. If water is present, oil is dirty, or if the oil smells burnt, drain and flush. Refill with new hydraulic oil.
- Vanes, valves or pistons are stuck. Use solvent to clean pump, as old fluid may gum up and cause sticking.
- Misalignment between pump & prime mover.
- Hose and fittings undersized. Flow restriction increases fluid velocity and creates noise. It may also cause over heating.