Sri Lanka Railways M8
|This article needs additional citations for verification. (December 2014)|
Class M8 No. 846
|Type and origin|
|Builder||Diesel Locomotive Works|
|Model||M8 (WDM-2), M8A(?)|
|Build date||1995 onwards|
|Total produced||M8(8), M8A (2)|
|Gauge||1,676 mm (5 ft 6 in)|
|Wheel diameter||1,092 mm (3 ft 7 in)|
|Wheelbase||12.834 m (42 ft 1 1⁄4 in)|
|Length||17.12 m (56 ft 2 in)|
|Width||2.864 m (9 ft 4 3⁄4 in)|
|Height||4.185 m (13 ft 8 3⁄4 in)|
|Axle load||18,800 kg (41,400 lb)|
|Locomotive weight||112,800 kg (248,700 lb)|
|Fuel capacity||5,000 l (1,100 imp gal; 1,300 US gal)|
|Prime mover||ALCO 251-B|
|Engine RPM range||400 - 1000 rpm|
|Engine type||M8 V16 diesel
M8A V12 diesel
|Cylinders||M8 (16), M8A (12)|
|Cylinder size||M8 228 mm × 266 mm (8.98 in × 10.47 in)
|Maximum speed||120 km/h (75 mph)|
|Power output||M8(2,800 hp (2,100 kW))
M8A(2,200 hp (1,600 kW))
|Train brakes||Air, Vacuum|
|Operator(s)||Sri Lanka Railways|
|Number(s)||M8 (841-848), M8A(877,878)|
|Delivered||M8 (1996), M8A (2001)|
|Current owner||Sri Lanka Railways|
Sri Lanka Railways Class M8 is a class of Sri Lankan diesel-electric locomotive that was developed by Diesel Locomotive Works at Varanasi, India, in 1996. This class of locomotives was fitted with 2,800 hp (2,100 kW) V16 power units. This is used on both passenger and freight trains on Sri Lanka Railways. Currently[when?] this is the most powerful locomotive in Sri Lanka.
This locomotive is capable of hauling 20 carriages at once but usually not used to haul more than 18 carriages. Major problems that are seen in this class are maintenance difficulties and corrosion.
Two (877 & 878) short truck M8A locomotives were delivered in 2001. They were imported to use on Up country main line, but it was impossible to run them due to their wheel design[clarification needed]. M8A locomotives were built using 2,200 hp (1,600 kW) V12 power units.
M8 and M8A are not used on the Main Line above Navalapitiya and on the Kelani Valley Line but are operated on other lines. This locomotive is used when it need to pull much heavy load. Mainly used in flat lines like Northern Line, Trincomalee Line, Batticaloa Line and Coastal Line.
Depot for the M8s is Diesel Electric Locomotive Shed at Maradana.
Accidents and incidents
- M8A No. 878 was seriously damaged in an accident with a concrete mixing transport truck. Now in use.
Notes and references
- Hyatt, David. Railways of Sri Lanka.[full citation needed]