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Troubleshooting

Rotary Vane Pumps

Issue – Lack of Vacuum in Tank:

  • Tank not closed or leaking
  • Collapsed hose: check wear and replace
  • Stuck automatic floating shut-off: put pump on pressure for a moment
  • Pump running backward after stopping: stuck or broken non-return valve (back-up valve)

Issue – Overheating:

  • Lack of oil
  • Wrong type of oil (See FAQ)
  • Cooling fins of casing plugged with dirt
  • Pump runs for too long WITHOUT air passing inside the pump (see manual)
  • RPM too high
  • Broken oil pump
  • Clogged oil line
  • Collapsed hose
  • Clogged filter or muffler

Issue – Pump not Turning:

  • Foreign material may be lodged in pump
  • Pump frozen up (winter conditions)
  • Vane or housing broken
  • Pump overheated

Liquid Ring Pumps

Issue – Unable to create vacuum:

  • Check water control valve
  • Check the water supply
  • Stop the pump and wait until the temperature has dropped to a sufficient level, or lower the temperature

Issue – Start-up power is too high:

  • Check the stop valves in the water supply for leakage

Issue – Noise during operation:

  • Increase the suction pressure or lower the temperature of the water

Issue – Leakage from bearing housing’s drain holes:

  • Stop the pump and contact the manufacturer