WDM-2

The WDM-2 is IR's diesel workhorse and can be found over the entire railway network. The first units were imported fully built from the American Locomotive Company in 1962. Since 1964, it has been manufactured in India by the Diesel Locomotive Works, Varanasi.

The WDM-2A is a variant of the original WDM-2. These units have been retro-fitted with air brakes, in addition to the original vaccuum brakes. The WDM-2B is a more recent loco, built with air brakes as original equipment.

The WDM-2 locos have a max. speed of 120km/h, restricted to 100km/h when run long hood leading. The gear ratio is 65:18.

Techinical Specs:

   * Builders: Alco, DLW
   * Engine: Alco 251-B, 16 cylinder, 2600hp (2430hp site rating) with Alco 710/720/?? turbocharger. 1000rpm max,                     400rpm idle; 228mm x 266mm bore/stroke; compression ratio 12.5:1. Direct fuel injection, centrifugal pump cooling system (2457l/min @ 1000rpm), fan driven by eddy current clutch (86hp @ engine rpm 1000).
   * Governor: GE 17MG8 / Woodwards 8574-650.
   * Transmission: Electric, with BHEL TG 10931 AZ generator (1000rpm, 770V, 4520A).
   * Traction motors: GE752 (original Alco models) (405hp), BHEL 4906 BZ (AZ?) (435hp) and (newer) 4907 AZ (with roller bearings)
   * Axle Load: 18.8 tonnes, total weight 112.8t.
   * Bogies: Alco design cast frame trimount (Co-Co) bogies 
   * Starting TE: 30.4t, at adhesion 27%.
   * Length over buffer beams: 15862mm.
   * Distance between bogies: 10516mm.