One maintenence technique: all the pipe joints were welded, to contain steam at numbers like 1500F and 1500 PSI. That sort of steam is corrosive and will literally dissolve steel. Once in a while a welded pipe seam would develop a pinhole, which might or might not be audible.
To detect such a leak, one would get a long broomstick and wave it around all the welded joints. The indication of a leak is that the invisible steam jet would cut off the end of the stick. It would cut a person in half too.
Diesels are immensely easier to maintain compared to high-pressure steam.
Low pressure steam and pistons, like on Liberty ships, were fairly simple and easy to maintain, but very inefficient.
The Titanic was a turbine but parts of the movie were filmed on the SS Jeremiah O'Brien, our local ancient Liberty ship that still goes out into the Bay now and then. The pistons are very dramatic compared to a turbine casing.