Sri Lanka Railways M10

Class M10 is a mainline diesel-electric locomotive built by Diesel Locomotive Works, India, which is the largest diesel-electric locomotive manufacturer in India,[2] for Sri Lanka Railways and constructed in 2012.[3] M10 is similar in appearance to DLW WDM3D but specifications are somewhat different. This is one of the longest locomotive types in Sri Lanka.[4] These Locomotives are for the Sri Lanka Railways as part of the ongoing Northern Railway reconstruction project.[3]

Class M10
Class M10 No.915 locomotive With Yal Devi train at Kurunegala railway station.
Type and origin
Power typeDiesel Electric
BuilderDiesel Locomotive Works, India
Total producedM10 - 3, M10A - 6
Gauge5 ft 6 in (1,676 mm)
Wheel diameter1,092 mm (3 ft 7 in)
Length18,650 mm (61 ft 2 14 in)
Width2,950 mm (9 ft 8 18 in)
Height4,077 mm (13 ft 4 12 in)
Axle load19.5 Tons
Loco weight117 Tons
Fuel typediesel
Fuel capacity5,000 L (1,100 imp gal; 1,300 US gal)
Prime moverALCO 251 B-16
Engine type4 Stroke V12 diesel
AlternatorBHEL TA 10102FV
TransmissionElectric AC/DC
MU workingYes
Loco brakeAir, Dynamic
Train brakesAir, Vacuum
Performance figures
Maximum speed120 km/h (75 mph)[1]
Power output2,300 hp (1,700 kW)
BrakeforceIRAB-1 System
ClassClass M10
Number in classM10 - 3, M10A - 6
LocaleSri Lanka
Delivered8 March 2012
First run2012
Current ownerSri Lanka Railways


Class M10 locomotives were introduced in 2012 numbered 915, 916, 917. These were used mainly on freight and oil trains. They have also been used irregularly on passenger services. M10 locomotives were also used for ballast trains in the construction work of the rail lines to Talaimannar and Kankasanthurei.

Class M10A

Another 6 locomotives were imported in 2012 were named under M10A class numbered 941 on wards. This is a technical variant of original M10 locomotive. On 20 September 2013, an M10A locomotive was successfully sent on trial to Kandy, the first time they were sent on the up country line.


This class was used for the construction work of Talaimannar and Kankasanthurei railway lines. After extending the northern line to Jaffna and beyond, M10s were used for passenger services including Yal Devi on the northern line.

See also


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