Two members of the Union Pacific steam team work on UP 4014 during a scheduled stop at Medicine Bow, WY. I am by no means a steam expert as I grew up in the diesel era, so I do not know precisely what is being down here. However, the crew has oil (or grease) and a funnel, so I assume they are greasing up some of the components. If you know for sure, please feel free to leave a comment!
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