my ESPEE MODELERS ARCHIVE
California's Railroad to the U.S. 1861 - 1996
Brass Krauss-Maffei © John W. Rosser.
SP made many modifications over the years both internal and external trying to improve the reliability of these locos. Cooling was always a problem, one of the first modifications was to add sheet metal ducts to get cooler air from lower in a tunnel to the engine air intake grilles. See page 20 in SP Historic Diesels Vol.2 - Diesel-Hydraulic Locomotives - by Joe Strapac. All SP and DRGW units received these external ducts, they were later replaced with internal ducting and extra grilles appeared in the lower carbody below the portholes.
Other external modifications included:
Prototype photos on the Southern Pacific Krauss-Maffei ML-4000 will clarify some of the above text.
Detailed, custom painted and decaled Rivarossi ML-4000 from Ron Sikorski
Overland Brass information kindly supplied by John Ford.
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This document prepared and maintained by Richard.A.Percy.
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This document © 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008. Richard.A.Percy