L2V..."They loaded, chained the beast down, and then drove away on the highway without ever shutting the big D8 engine down?? What was that about?"
Got me! I guarantee that is not recommended operating procedure from Cat, LOL! Most likely they had dead or weak batteries and it would be hard to re-start. Those big 24V batteries for that thing are not cheap, and they don't sell'em at Sears or Wal-Mart. Or maybe the contractor was billing his customers by the hour based on machine hourmeter reading, LOL!