Indian locomotive class YDM-1

The Indian locomotive class YDM-1 is a class of diesel-Hydraulic locomotive that was developed in 1954 by North British Locomotive Company (NBL) for Indian Railways. Its class designation denotes a metre gauge (Y) diesel (D) mixed traffic (M) locomotive of the 1st generation (1). They entered service in 1955. A total of 20 YDM-1 locomotives was built between 1954 and 1956, which made them among the first metre-gauge main-line diesels.

The YDM-1 served both passenger and freight trains for over 46 years. As of January 2020, all 20 locomotives have been withdrawn from service with 3 locomotives being preserved at various location around India.

History These locomotives originally called 'DY' class was imported from North British Locomotive Company (NBL) to haul goods and passenger rakes in Western Railways particularly around Gandhidham due to of scarcity of water for steam locomotives. These are among the first Metre Gauge main-line diesels locomotives of India.

The YDM-1 class locomotives are the survivors from the second batch of North British diesel locos supplied in 1955. They were homed at a specifically made Diesel shed in Gandhidham. CLW replaced the engines on these with Maybach engines around 1975. Western Railways phased these locos out in the end of the 1990s (December 1999) from mainline service and from shunting duties in Ajmer on 15 February 2001. YDM-1 6002 came at NRM from Wankaner in August 2003 after renovation at Ajmer Loco Workshop.

Specification

+Original NoNo 3001 to 3020Maker's Name & NoNorth British; Locomotive Co. Glasgow, UK, 27507BuildersNorth British LocomotiveEnginePaxman V12 RPHXL II, 625/580 hp replaced by Mak/CLW L6 6M 282 A(K), 700 hpTransmissionVoith hydraulic with Cardan shaft drive to bogiesYear Built1954Gear BoxDavid Brown, UKWheel ArrangementB-BHauling Power10,977 kgTare Weight42 TonnesGauge1 MetreCostRs. 4,85,209/- (Capital Head)RemarksFitted with Automatic, Vacuum & Air Brake SystemFirst TripFrom Gandhi Dham to PalanpurLast Serviceworked for Kandla Port and Naliya etc.

Preserved Examples A total of three YDM-1 locomotives have been preserved all over India. ClassManufacturerLoco NumberPrevious shedNameLiveryLocationrefYDM-1NBL6002GandhidhamOrange with twin black stripesplinthed at National Railway Museum, Delhi (NRM)https://www.irfca.org/apps/locos/show/217?list_type=preserved YDM-1RNBL6008GandhidhamLight blue/red/dark bluePreserved at Regional Rail Museum, Chennai. https://www.irfca.org/apps/locos/show/223?list_type=preserved YDM-1NBL6012GandhidhamNavy blue with yellow stripePreserved at Regional Rail Museum, Chennai. https://www.irfca.org/apps/locos/show/230?list_type=preserved

Former shed

Gandhidham (GIM): All the locomotives of this class has been withdrawn from service.

Indian locomotive class YDM-1

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