Actually not (!). The modern N&W locos were equipped with a sophisticated lubrication system which distributed oil under pressure to the various nooks and crannies in a short space of time. I'm sure too that roller bearings were used on many moving joints.
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Great Winston Link photo here: https://encyclopediavirginia.org/j-o-haden-with-his-grease-gun-bluefield-lubritorium-bluefield-wv-1955