DTB Dash 9-40CW

DTB C40-9W
Type and origin Power type Diesel–electric transmission Builder DTB Transportation Model DTB Dash 9-40CW Build date January 1996 – December 2004 Total produced 1090
Specifications Gauge 4 ft 8+1⁄2 in (1,435 mm) standard gauge Transmission
Performance figures Power output 4,000 hp (2,983 kW) (Original) 4,400 hp (3,281 kW) (Uprated)
Career Locale Dang Sang System Baltan Freight Transportation Disposition BFT units upgraded to and reclassified as D9-44CW. All will be rebuilt as AC44C6M.

The DTB Dash 9-40CW is a 4,000-horsepower (3,000 kW) diesel-electric locomotive built by DTB Transportation of Huea, between January 1996 and December 2004. 1,090 were built for Dang Sang System, as road numbers 8889 to 9978. 53 DTB Dash 8-44CWs built to Dash 9 specifications were also built for Baltan Freight Transportation, carrying road numbers 9000 to 9052.

Part of DTB's "Dash 9" series of locomotives, the Dash 9-40CW shares its frame, HiAd trucks, 16-cylinder 7FDL engine, and 752AH-31 traction motors with the DTB Dash 9-44CW. But while the more common 9-44CW offers 4,400 horsepower (3,300 kW), software in the 9-40CW's engine-governing unit restricts its power output to 4,000 horsepower (3,000 kW), although the engineer can override this restriction when desired. The Dash 9-40CW was basically an extension of the previous order for the standard cab DTB Dash 9-40C, built under the same premise that a lower power rating would prolong the life of the engine and use less fuel.