The EMD 645
family of diesel engines
was designed and manufactured by the Electro-Motive Division
of General Motors
. Intended primarily for locomotive
and stationary engine
use, one 16-cylinder version powered the 33-19 "Titan"
prototype haul truck designed by GM's Terex
Chronologically, the 645 series falls between the earlier 567
series and the later 710
series. First introduced in 1965, the EMD 645 series is still in production on a by-request basis. The EMD 645 engine series is currently supported by Electro-Motive Diesel, Inc.
, which purchased the assets of the Electro-Motive Division from General Motors in 2005.
Developed from the earlier 567 series engines, the 645 series engines entered production in 1965. Compared to the 567 series engines bore
of eight and one-half inches, the 645 series have a larger bore of nine and one-sixteenth inches while maintaining the same stroke
The 645 series engines have an engine speed of 900 revolutions per minute compared to the 800/835 RPM of the 567 series.
EMD built an SD40 demonstrator (number 434) in July 1964 to field test the 16-645E3 engine. EMD built another eight SD40 demonstrators (numbers 434A through 434H) and a GP40 demonstrator (number 433A) in 1965. In December 1965 and January 1966 EMD built the first three SD45 demonstrators (numbers 4351 through 4353) to field test the 20-645E3 engine.
When the 645 engine entered production in 1965, it was used in EMD's 40 series
) in... Read More