The Collaborative International Dictionary of English v.0.48:

Wrecking \Wreck"ing\,
   a. & n. from Wreck, v.
   [1913 Webster]

   Wrecking car (Railway), a car fitted up with apparatus and
      implements for removing the wreck occasioned by an
      accident, as by a collision.

   Wrecking pump, a pump especially adapted for pumping water
      from the hull of a wrecked vessel.
      [1913 Webster]