Tags: Locomotive.
Southern Pacific Company’s MM-2 class of steam locomotives was Southern Pacific’s (SP) only class of 2-6-6-2 locomotives ordered and built as cab forward locomotives. They were built in 1911 by Baldwin Locomotive Works and entered service on SP beginning September 19 1911. By 1914 they had all been upgraded with an additional leading axle making them 4-6-6-2 locomotives. They reclassified their MM-2 as AM-2. This was done to improve handling at speed.