The Indian locomotive class WDM-2 is a class of diesel-electric locomotive that was developed in 1962 by American Locomotive Company (ALCO) for Indian Railways. The model name stands for broad gauge (W), Diesel (D), Mixed traffic (M) engine, 2nd generation (2). They entered service in 1962. A total of more than 2,700 WDM-2 was built at ALCO and Banaras Locomotive Works (BLW or DLW, as it was formerly Diesel Locomotive Works), Varanasi between 1962 and 1998, which made them the most numerous class of mainline diesel locomotive until its successor the WDM-3A.
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Quick Facts WDM-2, Type and origin ...
WDM-2 |
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WDM-2 18233 Kundan on display. |
Type and origin |
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Power type | Diesel |
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Builder | Alco, BLW |
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Model | DL560C |
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Build date | 1962–1998 |
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Total produced | WDM-2/A/B: 2,700 |
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Specifications |
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Configuration:
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• UIC | Co′Co′ |
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• Commonwealth | Co-Co |
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Gauge | 1,676 mm (5 ft 6 in) |
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Bogies | ALCO Asymmetric cast frame trimount |
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Wheel diameter | 1,092 mm (3 ft 7 in) |
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Wheelbase | 12.834 m (42 ft 1+1⁄4 in) |
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Length | 17.12 m (56 ft 2 in) |
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Width | 2.864 m (9 ft 4+3⁄4 in) |
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Height | 4.185 m (13 ft 8+3⁄4 in) |
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Axle load | 18,800 kg (41,400 lb) |
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Loco weight | 112,800 kg (248,700 lb) |
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Fuel type | Diesel |
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Fuel capacity | 5,000 L (1,100 imp gal; 1,300 US gal) |
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Prime mover | ALCO 251-B |
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RPM range | 400 - 1,000 rpm |
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Engine type | V16 diesel |
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Aspiration | Turbo-supercharged |
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Traction motors | GE752, BHEL 4906 BZ and 4907 AZ |
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Cylinders | 16 |
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Cylinder size | 228 mm × 266 mm (8.98 in × 10.47 in) bore×stroke |
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Transmission | Diesel-electric transmission |
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MU working | 2 |
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Train brakes | Air, Vacuum and Dual |
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Performance figures |
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Maximum speed | 120 km/h (75 mph) |
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Power output | Max:2,600 hp (1,900 kW) Site rated:2,430 hp (1,810 kW) |
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Tractive effort | 30.4 t (30 long tons; 34 short tons) |
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Factor of adh. | 0.27 |
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Career |
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Operators | Indian Railways |
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Numbers | 16000-16887, 17100-17999, 18040-18079, 18112-18514, 18523-18900, 18903-18999 |
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Nicknames | Jumbo, Prabal |
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Locale | All over Indian Railways |
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Delivered | 1962 |
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First run | 1962 |
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Retired | November 2023 |
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Preserved | 10 |
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Close
The WDM-2 is one of the most successful locomotives of Indian Railways serving both passenger and freight trains for over 60 years. A few WDM-2 units were exported to neighbouring countries like Sri Lanka and Bangladesh. Despite the introduction of more modern types of locomotives like WDG-4 and electrification, a significant number are still in use, both in mainline and departmental duties. As of November 2023, all WDM-2 units have been retired, with further examples in service as WDM-3A or WDM-2S.