Sri Lanka Railways M8 - Misplaced Pages

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Class M8

Class M8 No. 846

Type and origin
Power type	Diesel
Builder	Banaras Locomotive Works
Model	M8 (WDM-2), M8A(?)
Build date	1995-2001
Total produced	M8(8), M8A (2)

Specifications
Configuration:
• UIC	Co'Co'
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)
Loco 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
RPM range	400 - 1000 rpm
Engine type	M8 V16 diesel M8A V12 diesel
Aspiration	Turbo-supercharged
Cylinders	M8 (16), M8A (12)
Cylinder size	M8 228 mm × 266 mm (8.98 in × 10.47 in) M8A?
Train brakes	Air, Vacuum

Performance figures
Maximum speed	120 km/h (75 mph)
Power output	M8(2,800 hp (2,100 kW)) M8A(2,200 hp (1,600 kW))
Factor of adh.	0.27

Career
Operators	Sri Lanka Railways
Numbers	M8 (841-848), M8A(877,878)
Locale	Sri Lanka
Delivered	M8 (1996), M8A (2001)
Current owner	Sri Lanka Railways
Disposition	active

Sri Lanka Railways Class M8 is a class of Sri Lankan diesel-electric locomotive that was developed by Banaras 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.

Performance

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.

Sub classes

M8A

Left:Class M8A, Right:Class M8

Two (877 & 878) short truck M8A locomotives were delivered in 2001. They were imported to use on Upcountry main line, but it was impossible to run them due to their wheel design of HAHS bogie without equaliser beams. M8A locomotives were built using 2,200 hp (1,600 kW) V12 power units.

Current operation

M8 and M8A are not used on the Main Line above Nawalapitiya 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. Since the accident, the locomotive has been repaired and put back into service.

Notes and references

Hyatt, David. Railways of Sri Lanka.

^ "Class M8". Sri Lanka Railways Info Page. 18 September 2012. Retrieved 22 August 2014.
"Mainline Diesel-Electrics". Model Railroad Club of Sri Lanka. Retrieved 22 August 2014.

External links

Article about Class M8 locomotive

v t e Locomotives and railcars of Sri Lanka
Steam locomotives	A1 A2 A3 B1 B2 B3 B4 B5 B6 B7 B8 B9 B10 C1 D1 D2 D3 E1 F1 F2 F3 H1^ J1^ J2^ K1^ L1^
Diesel-electric locomotives	G1 G2 M1 M2 M3 M4 M5 M6 M7 M8 M9 M10 M11
Diesel-hydraulic locomotives	P1^ N1^ N2^ W1 W2 W3 Y Y1
Steam railcars	R1 R2 R3 R4 V1^ V2^
Diesel railcars	T1
Diesel multiple units	S1 S2 S3 S4 S5 S6 S7 S8 S9 S10 S11 S12 S13 S14
^ indicates narrow (2 ft 6 in / 762 mm) gauge stock

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