The Sri Lanka Railways M4 is a class of diesel-electric locomotive manufactured in Canada by Montreal Locomotive Works.

This was the longest locomotive in the Sri Lanka Railways previously.

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.

752 Point Pedro was painted in a special ICE (Intercity Express) livery.