Sri Lanka Railways M4

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Sri Lanka Railways M4
SL Colombo asv2020-01 img37 Maradana station.jpg
Type and origin
Power typeDiesel-electric
Builder Montreal Locomotive Works
Order numberM-6080
Serial numberM-6080-01 to M-6080-14
Model MX-620
Build date1975 onwards
Total produced14
Specifications
Configuration:
   UIC Co′Co′
Gauge 5 ft 6 in (1,676 mm)
Wheelbase Bogie: 11 ft 2 in (3,404 mm)
Length58 ft 3 in (17.75 m)
Loco weight93 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 speedDesign: 104 km/h (65 mph)
Service: 65 km/h (40 mph)
Power output1,750 hp (1,300 kW)
Career
Operators Sri Lanka Railways
Class M4
Number in class14
Numbers743–756
Official nameSee table
First run1975

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.

Contents

This was the longest locomotive in the Sri Lanka Railways previously. All units are still operational. On regular operation they are rarely used beyond Polgahawela on the main line (only with assistance from a dynamic brakes equipped locomotive on downhill), and are not used beyond Nawalapitiya. They used to travel on the full main line 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 (Intercity Express) livery.

Fleet

NumberNameNotes
743Madhu Air Brakes Added
744SigiriAir Brakes Added
745RuwanweliAir Brakes Added
746NamunukulaAir Brakes Added
747KelaniAir Brakes Added
748WalaweAir Brakes Added
749DunhindaAir Brakes Added
750IsurumuniAir Brakes Added
751DiyalumaAir Brakes Added
752Point PedroSpecial ICE livery was on this locomotive. Now normal livery.
753SamanalaImported with Dyn Brakes. Air Brakes Added
754MenikImported with Dyn Brakes. Air Brakes Added
755MahaweliImported with Dyn Brakes. Air Brakes Added
756LaxapanaImported with Dyn Brakes. Air Brakes Added

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