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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.┬áCheck 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.