A fleet of excavators operated at an Australian mine were suffering long term successive failures of the hydraulic main pumps. Teardown of the damaged pumps indicated that contaminated fluid was entering the pumps from the suction side and causing damage. Additionally, false contamination sensor alarms were instigating the replacement of components up to 75% short of the component’s estimated life.

Following installation of the Mag-Shield®, the frequency of contamination sensor alarms and contamination sensors requiring physical cleaning has been reduced by 75%. Engineering at the trial site reported the following: “Oil analysis results were inconclusive. As shown by the image (below) there was a consistent covering of extremely fine particles on all surfaces, there was also a significant build up on the edges of the screens in the lower flow areas. It also shows that particles of the size caught by Mag-Shield® are not accurately reflected in oil sample reports.”