This machine is a continuous-action surfacing tamper. It lifts, lines, and tamps the track, as well as dynamically stabilizes the rails so that trains can safely run at track speed over the track. This is the final piece of equipment in the tie gang.
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A pair of tampers work to ensure that the ballast is properly set, the ties are positions, and the rails are aligned and stabilized so that trains can run over the rails after new ties have been inserted under the tracks.
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