Class 040 YDA Diesel Locomotive

On the narrow gauge lines of in the center and west of Algeria, which account for more than one third of the national network's route mileage, SNTF operates two GM diesel types, Class 040 YDA forming the larger series.

Sub types
At the same time as the Class 040 YDA locomotives were supplied, GM delivered five standard gauge Co-Co versions of the GL18M model to SNTF. They are designated Class 060 WDK. Six examples of a more powerful turbocharged variant, Model GT18LC-2m (SNTF Class 060 YDD) were supplied by GM Canada in 1989.

Special features
A major operator of the GM traction, SNTF is the only user of the GL18M in its narrow gauge A1A-A1A configuration. That apart, this is a conventional GM product employing the proven 645E3 engine. The class forms the principal motive power on the railway's three unconnected west of Algiers, to Djelfa, from Ighilizane to Mahdia and from Tizi southwest to Bechar. Class 040 YDA handles both freight and passenger traffic.