Hitachi EX5600 excavator
Mag-Shield® reduce false fluid contamination alarms in Hitachi EX5600 excavator
Challenges
An Australian mine operating a Hitachi EX5600 excavator was suffering long-term successive failures of the hydraulic main pumps due to contaminated fluid 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.
Solution
A MagShield® kit was fitted on one of several problematic excavators that were experiencing numerous repeat failures to provide immediate and effective filtration. As contaminated fluid circulates and returns to the hydraulic tank, ferrous material is captured by the MagShield®, preventing the spread throughout the entire system. This becomes particularly critical following repairs, as residual contamination is captured and prevented from recirculating and causing further damage.
Results
The performance of the Mag-Shield®, was monitored following installation. The frequency of contamination sensor alarms and the need for physical cleaning of contamination sensors has been reduced by 75%. Contamination removal post-failure will also be greatly improved. Engineering at the trial site reported the following: “Oil analysis results were inconclusive. As shown by the image (on the right), there was a consistent covering of extremely fine particles on all surfaces, and there was also a significant buildup 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.”
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