Class M4

MLW (Canada) Alco Bombardier MX620. This is the longest locomotive in the SL Roster. It was imported 1975 onwards. All units still operational. Can not go upcountry line beyond Nawalapitiya, since its bogie wheel base (11′ 2″) is exceeding 10′ 7″, standard for upcountry line. Normally it is not going beyond Polgahawela on main line.

  • Builder : Montreal Locomotive Works Canada
  • Imported : 1975
  • Weight : 93 tons (97)
  • Engine Model : MX-620
  • Power : 1750hp Alco Bombardier V12 12-251C3 (4 stroke) (originally 2000hp)
  • Maximum Speed : 104 kmph (limited to 65kmph)
  • Axle Arrangement : Co-Co
  • Bogie Wheel Base : 11′ 2″ (ie. distance between front and rear axle of a bogie)
  • Total number of locomotives = 14
  • Livery : Dark blue, Light blue, Silver and Yellow strip
    • Special ICE livery was on # 752 “Point Pedro”. Now normal livery.
Class M4 745
M4 # 745 “Ruwanweli”
Image courtesy Mr. Charith Dissanayaka
Number Name Remarks
743 Madhu
744 Sigiri
745 Ruwanveli
746 Namunukula
747 Kelani
748 Walawe
749 Dunhinda
750 Isurumuni
751 Diyaluma
752 Point Pedro
753 Samanala Dynamic Breaks Added
754 Menik Dynamic Breaks Added
755 Mahaweli Dynamic Breaks Added
756 Laxapana Dynamic Breaks Added
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