| Indian locomotive class WDM-3 |
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| Type and origin |
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| Power type | Diesel |
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| Designer | Henschel |
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| Builder | Henschel |
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| Order number | 66/RSF/466/15 |
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| Serial number | 31300–31307 |
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| Model | DHG 2500 BB |
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| Build date | 1970 |
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| Total produced | 8 |
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| Specifications |
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Configuration:
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| • AAR | C-C |
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| • UIC | Bo-Bo |
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| • Commonwealth | Bo-Bo |
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| Gauge | 1,676 mm (5 ft 6 in) |
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| Wheel diameter | 1,400 mm (4 ft 7 in) |
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| Wheelbase | 1,092 mm (3 ft 7 in) |
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| • Engine | 1 |
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Length:
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| • Over couplers | 16.234 m (53 ft 3+1⁄8 in) |
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| • Over body | 14.8 m (48 ft 6+5⁄8 in) |
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| Width | 3.076 m (10 ft 1+1⁄8 in) |
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| Height | 4.235 m (13 ft 10+3⁄4 in) |
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| Axle load | 19,000 kg (42,000 lb) |
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| Loco weight | 76,000 kg (168,000 lb) |
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| Fuel type | Diesel |
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| Fuel capacity | 3,200 L (700 imp gal; 850 US gal) |
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| Lubricant cap. | 425 L (93 imp gal; 112 US gal) |
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| Coolant cap. | 425 L (93 imp gal; 112 US gal) |
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| Sandbox cap. | 2.5 L (0.55 imp gal; 0.66 US gal) |
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| Power supply | 110 V DC supply |
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| Prime mover | MD-108OZ |
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| RPM: | |
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| • RPM idle | 600 |
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| • Maximum RPM | 1,600 |
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| Engine type | V20 diesel |
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| Aspiration | Turbo-supercharged |
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| Cylinders | 20 |
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| Transmission | Diesel-hydraulic transmission |
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| MU working | 2 |
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| Loco brake | Air, Vacuum Hydrostatic braking |
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| Train brakes | Air, Vacuum |
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| Air tank cap. | 3,200 L (700 imp gal; 850 US gal) /min |
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| Compressor | 3,600 L (790 imp gal; 950 US gal) /min |
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| Exhauster | 14,000 L (3,100 imp gal; 3,700 US gal) /min |
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| Performance figures |
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| Maximum speed | 120 km/h (75 mph) |
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| Power output | Max: 2,500 hp (1,900 kW)
Site rated: 2,440 hp (1,820 kW) |
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Tractive effort:
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| • Starting | 22.0 t (22 long tons; 24 short tons) |
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| • 1 hour | 22.0 t (22 long tons; 24 short tons) |
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| • Continuous | 14.0 t (14 long tons; 15 short tons) |
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| Factor of adh. | 0.33 |
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| Career |
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| Operators | Indian Railways |
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| Numbers | 18515-18522 |
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| Locale | SCR |
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| Delivered | July 1970 |
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| First run | August 1970 |
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| Last run | 1990s |
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| Retired | 1995 |
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| Withdrawn | 1995 |
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| Scrapped | 1996 |
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| Disposition | All scrapped |
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The Indian locomotive class WDM-3 was a type of diesel-hydraulic locomotive that was developed by Henschel for Indian Railways in 1962. The model name "WDM-3" stood for broad gauge (W), Diesel (D), Mixed traffic (M) engine, 3rd generation (3). These locomotives were put into service between 1970 and 1971, and a total of eight were built between 1962 and 1970. However, they were decommissioned at Gooty in 1995 and are now retired from service.
These diesel-hydraulic locomotives were not related to the ALCO WDM-3A, despite their similar name.