| GE Dash 9 Series | 
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| | Specifications | 
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 | Configuration: 
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 | • AAR | C-C (C40-9, C40-9W, C44-9W, C-38AChe) B+B-B+B (Dash 9-40BBW)
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 | Gauge | 4 ft 8+1⁄2 in (1,435 mm) | 
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 | Trucks | GE HiAd | 
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 | Length | 73 ft 2 in (22.30 m) | 
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 | Fuel capacity | 4,600 US gal (17,400 L) (C40-9, C40-9W) 5,300 US gal (20,100 L) (C44-9W)
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 | Prime mover | GE 7FDL16 | 
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 | Engine type | 45° V16, four stroke cycle | 
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 | Aspiration | Turbocharged | 
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 | Alternator | GE | 
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 | Traction motors | GE | 
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 | Cylinders | 16 (C40-9, C40-9W, C44-9W) | 
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 | Transmission | Alternator, silicon diode rectifiers, DC traction motors | 
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 | Gear ratio | 6.984:1 | 
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| | Performance figures | 
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 | Power output | 4,000 hp (2,980 kW) (C40-9, C40-9W, Dash 9-BBW) 4,400 hp (3,280 kW) (C44-9W)
 5,100 hp (3,800 kW) (C-38AChe)
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| | Career | 
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 | Operators | See text | 
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 | Locale | North America, Australia, Brazil, China | 
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 | Disposition | Most still in service, many being rebuilt to AC44C6M | 
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The Dash 9 Series is a line of diesel locomotives built by GE Transportation. It replaced the Dash 8 Series in the mid-1990s, and was superseded by the Evolution Series in the mid-2000s. Dash 9 series locomotives are some of the most common in the United States.