Indian locomotive class WDM-2

Specifications
Specifications
Configuration:;
• UIC	Co′Co′
• Commonwealth	Co-Co
Gauge	1,676 mm (5 ft 6 in)
Bogies	ALCO Asymmetric cast frame trimount
Wheel diameter	1,092 mm (3 ft 7 in)
Wheelbase	12.834 m (42 ft 1+1⁄4 in)
Length	17.12 m (56 ft 2 in)
Width	2.864 m (9 ft 4+3⁄4 in)
Height	4.185 m (13 ft 8+3⁄4 in)
Axle load	18,800 kg (41,400 lb)
Loco weight	112,800 kg (248,700 lb)
Fuel type	Diesel
Fuel capacity	5,000 L (1,100 imp gal; 1,300 US gal)
Prime mover	ALCO 251-B
RPM range	400 - 1,000 rpm
Engine type	V16 diesel
Aspiration	Turbo-supercharged
Traction motors	GE752, BHEL 4906 BZ and 4907 AZ
Cylinders	16
Cylinder size	228 mm × 266 mm (8.98 in × 10.47 in); bore×stroke
Transmission	Diesel-electric transmission
MU working	2
Train brakes	Air, Vacuum and Dual

Type and origin
Type and origin
Power type	Diesel
Builder	Alco, BLW
Model	DL560C
Build date	1962–1998
Total produced	WDM-2/A/B: 2,700

WDM-2
WDM-2
Power type
Type and origin
Power type	Diesel
Builder	Alco, BLW
Model	DL560C
Build date	1962–1998
Total produced	WDM-2/A/B: 2,700
Configuration:;
Specifications
Configuration:;
• UIC	Co′Co′
• Commonwealth	Co-Co
Gauge	1,676 mm (5 ft 6 in)
Bogies	ALCO Asymmetric cast frame trimount
Wheel diameter	1,092 mm (3 ft 7 in)
Wheelbase	12.834 m (42 ft 1+1⁄4 in)
Length	17.12 m (56 ft 2 in)
Width	2.864 m (9 ft 4+3⁄4 in)
Height	4.185 m (13 ft 8+3⁄4 in)
Axle load	18,800 kg (41,400 lb)
Loco weight	112,800 kg (248,700 lb)
Fuel type	Diesel
Fuel capacity	5,000 L (1,100 imp gal; 1,300 US gal)
Prime mover	ALCO 251-B
RPM range	400 - 1,000 rpm
Engine type	V16 diesel
Aspiration	Turbo-supercharged
Traction motors	GE752, BHEL 4906 BZ and 4907 AZ
Cylinders	16
Cylinder size	228 mm × 266 mm (8.98 in × 10.47 in); bore×stroke
Transmission	Diesel-electric transmission
MU working	2
Train brakes	Air, Vacuum and Dual
Maximum speed
Performance figures
Maximum speed	120 km/h (75 mph)
Power output	Max:2,600 hp (1,900 kW); Site rated:2,430 hp (1,810 kW)
Tractive effort	30.4 t (30 long tons; 34 short tons)
Factor of adh.	0.27
Operators
Career
Operators	Indian Railways
Numbers	16000-16887, 17100-17999, 18040-18079, 18112-18514, 18523-18900, 18903-18999
Nicknames	Jumbo, Prabal
Locale	All over Indian Railways
Delivered	1962
First run	1962
Retired	November 2023
Preserved	10

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.

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.

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