Sri Lanka Railways M4

Class M4 No. 745 Ruwanweli

Type and origin
Power type	Diesel-electric
Builder	Montreal Locomotive Works
Order number	M-6080
Serial number	M-6080-01 to M-6080-14
Model	MX-620
Build date	1975 onwards
Total produced	14

Specifications
UIC class	Co′Co′
Gauge	5 ft 6 in (1,676 mm)
Wheelbase	Bogie: 11 ft 2 in (3,404 mm)
Length	58 ft 3 in (17.75 m)
Loco weight	93 long tons (94 t; 104 short tons)
Fuel type	Diesel
Prime mover	ALCO 251C3
Engine type	4 stroke V12 diesel
Cylinders	12
Loco brake	Air, Vacuum, Dynamic (Some vary)

Performance figures
Maximum speed	Design: 104 km/h (65 mph) Service: 65 km/h (40 mph)
Power output	1,750 hp (1,300 kW)

Career
Operators	Sri Lanka Railways
Class	M4
Number in class	14
Numbers	743–756
Official name	See table
First run	1975

The Sri Lanka Railways M4 is a class of diesel-electric locomotive manufactured in Canada by Montreal Locomotive Works. Fourteen of the manufacturers' model MX-620 were imported in 1975.

This was the longest locomotive in the Sri Lanka Railways previously. All units are still operational. Normally they are not used beyond Polgahawela on the main line. Usually not going upcountry now. But have gone there regularly until the previous decade.

They are painted in a livery of dark blue, light blue, silver with yellow striping; although No. 752 Point Pedro was painted in a special ICE livery.

Fleet

Number	Name	Notes
743	Madhu	Air Brakes Added
744	Sigiri	Air Brakes Added
745	Ruwanweli	Air Brakes Added
746	Namunukula	Air Brakes Added
747	Kelani	Air Brakes Added
748	Walawe	Air Brakes Added
749	Dunhinda	Air Brakes Added
750	Isurumuni	Air Brakes Added
751	Diyaluma	Air Brakes Added
752	Point Pedro	Special ICE livery was on this locomotive. Now normal livery.
753	Samanala	Imported with Dyn Brakes. Air Brakes Added
754	Menik	Imported with Dyn Brakes. Air Brakes Added
755	Mahaweli	Imported with Dyn Brakes. Air Brakes Added
756	Laxapana	Imported with Dyn Brakes. Air Brakes Added

Gallery

A M4 Locomotive At Galle Station

Class M4 at Peradeniya Junction

References

"Class M4 Locomotive". www.ceylonrailway.com.
Hughes, Hugh (1996). Indian Locomotives: Part 4 – 1941–1990. Harrow, Middlesex: The Continenetal Railway Circle. ISBN 0-9521655-1-1.

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

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

^ indicates narrow (2 ft 6 in/762 mm) gauge stock

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