Indian locomotive class WDM-4

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WDM-4 locomotive.jpg
Type and origin
Power typeDiesel
BuilderElectro-Motive Diesels
ModelGT16; SD-24
Build date1962
Total produced72
 • UICCo-Co, Co'Co'
Gauge1,676 mm (5 ft 6 in)
BogiesFlexicoil Mark I cast steel
Loco weight112,800 kg (248,700 lb)
Fuel typeDiesel fuel
Engine typetwo-stroke V16 diesel
TransmissionDiesel electric
Train brakesVacuum
Performance figures
Maximum speedRestricted: 120 km/h (75 mph)
Running: 130 km/h (81 mph)
Rated: 140 km/h (87 mph)
Tested: 145 km/h (90 mph)
Power output2,600 hp (1,900 kW)/
2,430 hp (1,810 kW)
Tractive effort28,200 kgf (276,548 N; 62,170 lbf)
OperatorsIndian Railways
Numbers18000-039, 18080-18111
LocaleNorthern Railway
Preserved2 (#18001, #18086)

The class WDM-4 is the fourth class of India's wide-gauge (W), diesel-fueled (D) and mixed-load (M) series, capable of hauling both freight and passenger trains. Despite the classification, it was never seen hauling freight trains. It is not known as to why IR decided to allot 4th class instead of 3rd as there was no WDM-3 at the time. This was India's first EMD locomotive, designated as GT16. [2] These were the fastest locomotives in India till the arrival of WAP-3. It does not come under the standard diesel classification system of IR. Similar to WDM-2, it could only haul 9 coaches. So for 18 coach Rajdhani Express, there used to be 2 locos of this class. One of them #18001, is preserved at National Rail Museum, Delhi. The gap in road numbers is due to the units delivered in Pakistan. #18004, #18022, #18098 and #18107 were purchased by IRCON International and sent to Bangladesh for construction work. These were withdrawn due to over-ageing. These in the end hauled passengers on Dehradun - Moradabad - Lucknow - Varanasi - Mughalsarai - Buxar - Patna - Howrah sections.[3]

Technical specifications[edit]

Hauling capacity 2,400 tonnes (2,400 long tons; 2,600 short tons)
Governor Woodwards

Trains hauled by WDM-4[edit]

Sheds Holding WDM-4[edit]


The very first unit #18001 is preserved at National Rail Museum and another unit from the second batch #18086 is preserved plinthed at Lucknow (Alambagh) Diesel Locoshed.

See also[edit]


  1. ^ "IRFCAspecs".
  2. ^ "".
  3. ^ "IRFCA".