Inside the heart of a steam locomotive Well, maybe the boiler is the heart, but perhaps we can think of the firebox as where a locomotive gets her “life.” The famous Union Pacific No. 844 gets some off-season work done at the Steam Shop in Cheyenne, Wyoming, on March 25, 2013. Quite a bit of work is being done around the mud ring area of the firebox, among other things. Here, inside the seemingly cavernous firebox, some grinding work is being performed by a member of the Steam Shop crew.
