RWS Market: Diesel shunting locomotives

Express Service is the Eastern European leader in offering new shunting locomotives. Bulgaria based company has developed several series of diesel and battery powered shunters that cover most industrial, in-yard or even light train service duties.

MDD 5 diesel shunting locomotive

The newest, largest and most powerful MDD5 shunting locomotive was developed, engineered and manufactured at the locomotive plant in Ruse. It is one of the largest and most technologically advanced machines ever produced in Bulgaria.

MDD 5 дизельный маневровый локомотив


  • Total power – 960kW
  • Wheelset arrangement  – B’- B’
  • Pulling force at the start – 240kN
  • Nominal weight – 72t
  • Fuel consumption at idle speed – 2.6 l/h
  • Engine Environmental Compliance – Stage V
  • Remote control

MDD 4 diesel shunting locomotive

MDD 4  meets all medium shunting requirements. It is powered by a 400kW Tier 4F engine thus the loco is the most eco-friendly diesel shunter in Europe.

MDD 4 дизельний маневровий локомотив

It is homologated in Switzerland, Italy and Bulgaria and could obtain permission in most EU administrations. Locomotive is extremely economic with idle fuel spending of just 2l/h. Its mass is 42 tons and is optionally radio remote controlled. Of course – it is the most affordable loco of its class amongst all European competitor models.

Gauge 1435mm
Transmissions type hydrodynamic
Axle arrangement                                           B
Power of the engine403 kW
Emissions standard Stage IV Final
Max. speed 60/30 km/h
Length over buffers 9340 mm
Width 3000 mm
Height 4080 mm
Wheelbase 4700 mm
Tara weight 41 t
Wheel dia. new / worn 920 / 860 mm
Starting effort 135 kN
Brakes Axle mounted discs
Operating temperatures (-30) to (+50) C˚
Min. curve radius 80 m.

MDD 3 diesel shunting locomotive

MDD 3 diesel shunting locomotive is the smallest two-axle shunter. It is powered by two synchronized diesel engines that deliver 300kW of power. Due to a good choice of gearboxes, vehicle top speed could be adjusted between 15 and 60km/h thus customers select the optimal tractive effort.

MDD 3 дизельний маневровий локомотив

These locos are quite flexible not only in terms of top speed – their mass is adjustable from just 20 tons for metro and urban rail projects to 36 tons for heavy industrial shunting works. Hauling capacity is up to 1600 tons. This model is homologated in Ukraine, Kosovo, Macedonia but it is generally intended to perform in-yards at industrial sites, ports, factories.

Gauge 1435mm
Wheelset arrangement                                 B (two axles)
Diesel engines 2×150 kW CAT
Speed regulation Electronic
Dimensions UIC 505-1 (see drawing)
Wheelbase 4700 mm
Tara weight.28 t
Top speed 60 km/h
Wheels profile UIC 510-2
Min. continuous speed 15 km/h
Min. curve radius 60 m.
Max. allowed slope4,20%
Max. traction force 120 kN
Wagons brake UIC 540, 541, 542 and 544
Operating temperatures (-30) to (+40) C˚

Express Service OOD
DZS, Ruse 7011, Bulgaria
Tel. +359 88 7412838

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