Scribd
Upload
1K views1 page

YDM4

The YDM-4 is a Co-Co diesel electric locomotive originally manufactured by Alco between 1961-1964 and later by DLW between 1968-1993. It has a maximum speed of 100km/h and is powered by a 1350/1200hp Alco 251B-6 or Alco 251D-6 engine. Some YDM-4 locomotives were exported by DLW to countries like Tanzania, Vietnam, and Bangladesh between 1976-2000.

Uploaded by

Atan Hasan
Copyright
© Attribution Non-Commercial (BY-NC)
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as DOC, PDF, TXT or read online on Scribd
1K views1 page

YDM4

The YDM-4 is a Co-Co diesel electric locomotive originally manufactured by Alco between 1961-1964 and later by DLW between 1968-1993. It has a maximum speed of 100km/h and is powered by a 1350/1200hp Alco 251B-6 or Alco 251D-6 engine. Some YDM-4 locomotives were exported by DLW to countries like Tanzania, Vietnam, and Bangladesh between 1976-2000.

Uploaded by

Atan Hasan
Copyright
© Attribution Non-Commercial (BY-NC)
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as DOC, PDF, TXT or read online on Scribd
You are on page 1/ 1

YDM4, YDM4ACo-Co diesel electrics originally from Alco (1961-1964), later manufactured by DLW (1968-1993). Alco model is DL535A.

Originally manufactured with only vacuum brakes and dynamic braking, no air brakes. Rated at 1350/1200hp. Max. speed 100km/h. YDM-4A are identical to YDM-4, except that they were supplied by MLW (1964). Some of the MLW locos do not have the 'A' suffix in the class designation. Ahmedabad was the main centre for these locos. A few were hauling local trains in the Secunderabad-Bodhan section in 1997, and are reported [8/00] to be working around Mysore, Villupuram, etc. Some from the Guntakal shed are still [7/02] hauling trains on the Pakala-Guntakal-Bellary route. Some are thought to be at Gandhidham after gauge conversion left Gandhidham - Palanpur an isolated MG line. DLW has exported some (15 each) of these to Tanzania and Vietnam (1976-1985), and to Bangladesh (2000?). The ones for Bangladesh were classed YDM-4BR and had dual cabs, a change achieved without modifying the length of the loco. This variant turned out later to have major cooling problems. Malaysian railways (KTM) acquired 39 used YDM-4's from IR in 1996. It is not clear if they were leased or sold. Of these, 14 were returned to India by 1999. In Malaysia they retained their IR road numbers (between 6352 and 6725).

Builders: Alco, MLW, DLW Engine: Alco 251B-6 (Alco/MLW), Alco 251D-6 (DLW); 6 cyl., 4-stroke, inline Transmission: Electric (DC-DC, in contrast to most other locos that were ACDC). Axle load: 12t. Bogies: Co-Co trimount. Fuel capacity: 3000l

Comparative Specifications

Diesel Locomotives
Class Year Maker Wheels Power Speed Weight (hp) (km/h) (tonnes) Starting TE Quantity (kg force) Serial Nos.

YDM- 1961- Alco / Co-Co 4 90 DLW

1400 (1300 net)

96

72

18935

572

60206049/61056129 (Alco) 61996258/62896769+ (DLW)

You might also like