W3 was designed to attach two or more locomotives (Multiple Units). And the driver can control all locomotives from a single cab when using these locos Double Headed (2 locomotives attached together). W3 is the only diesel hydraulic locomotive which is capable of hauling Chinese carriages.The lifetime of Class W1 locomotives were limited to 20 years.
Nawalapitiya is a town in Central Province, Sri Lanka. It is in the Kandy District, Nawalapitiya holds a special place in locomotive transportation in Sri Lanka since it is one of the railway’s three transport division headquarters. Nawalapitiya Railway station is the second longest station in Sri Lanka.