This Liebherr 984 was customized for Clairton Slag (CSI) located in Pittsburgh, PA.  Used primarily for salt and mulch handling, it is also used with another attachment to unload wire. 
Click here for a testimonial from CSI

 
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Liebherr 984 - Overview

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Custom built stick and boom

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8 ft. cab elevation

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6 yd. clamshell bucket