Some of the photographs originate from exploitation manual written by A. Radosavljević, T. Kožulj and Lj. Bečejac, issued by Želnid publisher, Belgrade.

641-class diesel-electric locomotives was built by Ganz MAVAG (Budapest) since 1960. They are mostly used as switchers or infrequently for freight service.

Technical data: Wheel arrangement B'o-B'o, 441 kW (600 hp), max. speed 80 km/h.

642-class diesel-electric locomotives was fabricated by Brissonneau et Lotz (France) and Đuro Đaković (Slavonski Brod), since 1960. They are mostly used for short distance freight and passenger service.

Technical data: Wheel arrangement B'o-B'o, 606 kW (825 hp), speed 80 km/h.

Another photo of 642-class engine.

643-class diesel-electric locomotives as 642-class, was fabricated by Brissonneau et Lotz (France) and Đuro Đaković (Slavonski Brod), since 1967. The only difference is diesel engine of 680 kW at 643-class.

Another photo of 643-class engine.

644-class locomotives is Macosa type G22U with 1500 hp. It was used by former SFRY railroads.

Diesel-electric locomotive of 645 class was built by GM-EMD in 1981, originally designated as GT22HW. These engines was used for passenger service only.

Technical data: Wheel arrangement (A1A)'-(A1A)', 1845 kW, speed 124 km/h.

661-class Diesel-electric locomotives built by GM-EMD, in the period 1960-1972. Originally it is GM-DD G16CW with 1454 kW (1950 hp) and C'o-C'o wheel arrangement. It was used for the freight and passenger service. Max. speed is 124 km/h.

Diesel locomotive of the same 661-class.

Diesel-electric locomotiveof the 662-class, produced in Đuro Đaković factory, used in former SFRY railroads.

Technical data: C'o-C'o wheel arrangement, with 1270 kW (1650 hp), max. speed 120 km/h.

664-class is build by General Motors Electro-Motive Division, and originally is GM-DD G26CW. It was produced from 1972, until 1985. Firstly it was used for freight service only, while nowadays is used for passenger service.

Technical data: C'o-C'o wheel arrangement, with 1640 kW (2200 hp), max. speed 124 km/h.

Same locomotive of 664-class.

Abandoned Canadian built MLW MX626 diesel locomotive of the 665 class. It has C'o-C'o wheel arrangement, V12 ALCO
251 engine with 2600 hp and max speed of 120 km/h.

Few of them was on service at Yugoslavian rails, but neither one is in use today. 

GM-EMD diesel locomotive accepted for the "Blue Train" used by Josip Broz Tito, in his frequent travels. Originally it is JT22CW-2, with C'o-C'o wheel arrangement, 1845 kW (2475 hp), and max speed of 122 km/h. It was produced in 1978.

667 class was represented with just two Russian built locomotives used in former SFRY railways. Nowadays is used in FYR of Macedonia. The photograph was mounted by the courtesy of Philip Wormald

Diesel locomotive named "Sutjeska", also used for the "Blue Train". Originally it is German V300 modell built in 1958. Locomotive was developed from V200 type, and specially designed after Yugoslavian order. Notable difference is C'o-C'o wheel arrangement at V300. As far as we know only four engines of these type was built, and three of them (named "Sutjeska", "Neretva" and "Kozara") served for the "Blue Train".

709-class is Diesel-hydraulic switcher, built in Czech republic. It has unusual B wheel arrangement, .

734-class is Diesel-hydraulic V60 Switcher, built in Germany.

Technical data: C wheel arrangement, with 511 kW (695 hp), max. speed 60 km/h.

The first diesel locomotive of 741-class produced by MIN Niš. Small series of these locomotives was built between 1971-1975.

Diesel locomotive of 742- class produced by MIN Niš. Small series of 742 locomotives was built in period 1971-1975.

Technical data: B'-B' wheel arrangement, with 1215 kW, max. speed 110 km/h.

Russian built diesel-hydraulic switcher, produced by LIZ in 1977.

Technical data: B'-B' wheel arrangement, with 882 kW (1200 hp), max. speed 80 km/h.

Diesel locomotive built by Đuro Đaković factory, former SFRY, nowadays in Croatia.

760 mm narrow gauge diesel locomotive built by Đuro Đaković at late sixties.

Standard gauge diesel maintain unit..

It is not a loco, but it's on rails, and it's diesel.