Pump Repair

Typical Pumps we repair are:

  • Submersible Wet Well and Submersible Dry Well Sewage Pumps
  • Vacuum Pumps
  • Positive Displacement Pump
  • Geared Pumps
  • Air Blowers
  • Multistage Pumps
  • Drainage Pumps

We repair all Manufacturer's including,but not limited to:


We have designed and built our own Pump Test Facility.We can test pumps up to and including the following duties

  • 40bar
  • 400L/sec
  • 160Kw

We use two underground tanks linked to each other over and underground.We use a 160Kw Variable Speed Drive as Power Supply and measure Flowrate and Pressure,thereby generating a Performance Curve.



The Problem

The pump had failed in service on Friday 17th of July due to severe wear on the Pump coupling,Pump shaft,and Motor Drive shaft.Neither the Pump shaft or Motor shaft were repairable,therefore rendering both pump and motor irrepairable.A direct replacement pump was not available from Grundfos,as the pump was deemed obsolete.The equivalent offered was approx 300mm longer in length,AND had a delivery time of 6 weeks+.

The Task

MSD advised that pipework modification would be very difficult and very expensive,due to the location of this pump.Therefore priority must be to ensure the replacement pump fits within the existing pipework.Second,production would be affected if this pump was not back in place by Saturday 1ST August.

The Solution

With no practical option available from Grundfos,we selected and sourced a replacement Motor from FRANKLIN,(Available from stock in Germany and arranged overnight shipping).We selected and sourced a replacement Pump Section by WILO in Germany which was built in 3 Days and also shipped overnight.

Materials on the original Grundfos Pump were:

Materials: Pump: Stainless steel Pump: DIN W.-Nr. 1.4401 Pump: AISI 316 Impeller: Stainless steel Impeller: DIN W.-Nr. 1.4401 Impeller: AISI 316 Motor: Stainless steel Motor: DIN W.-Nr. 1.4539 Motor: AISI 904 L Sleeve: Stainless steel Sleeve: DIN W.-Nr. 1.4401 Sleeve: AISI 316 Rubber: E/FKM

All materials on the new pump and motor therefore had to be a minimum of Stainless Steel 1.4401 or better.

Both Pump and Motor had arrived in our workshop by Wednesday 29th of July.When assembled,the replacement pump was approx. 110mm longer than the original pump.On the booster discharge,there was a pipe fitting which had some free lenght available.By shortening this lenght to the minimum, we achieved an overall length short enough to fit within the existing shroud.The only other modification we had to complete was the new Pump Section had a DN65 Threaded Outlet.Fortunately,we were able to transfer the original DN80 Pump Outlet on to the new Pump Section.

The Result

Pump was collected by MSD Friday 31st July,and was commissioned successfully by MSD on Saturday 1ST August

Damaged Motor Shaft
Damaged Motor Shaft
Damaged Pump Coupling
Damaged Pump Coupling
Damaged Pump Shaft
Damaged Pump Shaft
Modified Discharge Sleeve
Modified Discharge Sleeve
Original Discharge Sleeve
Original Discharge Sleeve
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