Article · Wikipedia archive · Last revised Aug 2, 2026

PKP class ST40

PKP Class ST40 is a new class of cargo diesel-electric locomotives used by the PKP LHS broad-gauge division and various Polish private operators, designated 311D or 311Da by its manufacturer, Newag. The class is a heavily reconstructed Soviet M62, using only the underframe. The body is new, the main engine is a General Electric GE 7FDL12. Original engines were also modernised, as ED118 A GE. The class is much more economical and modern than a basic M62. The body has external walkways instead of an internal passage connecting the cabs. The first locomotive was modernised in 2007. As of April 2025, there were 48 class 311D completed, of which 27 are broad gauge 311Da units for PKP LHS, where they are designated ST40s.

Last revised
Aug 2, 2026
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Citations
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Wikipedia ↗
PKP ST40/Newag 311Da
PKP LHS ST40s-09
Type and origin
Power typeDiesel
BuilderNewag Poland
Model311Da
Build date2007-
Specifications
Configuration:
​
 • UICCo-Co
Gauge1,520 mm (4 ft 11+27⁄32 in) (PKP LHS)
1,435 mm (4 ft 8+1⁄2 in) (other operators)
Length17.55 m
Width2.95 m
Height4.62 m
Fuel typeDiesel
Engine typeGE 7FDL 12 EFI
Traction motorsGE ED 118A
Cylinders12
TransmissionDiesel-Electric
MU workingYes
Loco brakeAir
Train brakesAir
Safety systemsSHP
Performance figures
Maximum speed100 km/h
Power output2,133 kW (2,860 hp)
Career
OperatorsPKP LHS/KB/PCC Rail
Number in class27 (PKP LHS)
5 (Kolej Bałtycka)
15 (DB Cargo Polska)
Nicknames"Batman", "Darth Vader", "Robocop", "Transformer"
First run2007
Dispositionin service

PKP Class ST40 is a new class of cargo diesel-electric locomotives used by the PKP LHS broad-gauge division and various Polish private operators, designated 311D (standard gauge) or 311Da (broad gauge) by its manufacturer, Newag. The class is a heavily reconstructed Soviet M62 (PKP ST44), using only the underframe. The body is new, the main engine is a General Electric GE 7FDL12. Original engines were also modernised, as ED118 A GE. The class is much more economical and modern than a basic M62. The body has external walkways instead of an internal passage connecting the cabs. The first locomotive was modernised in 2007. As of April 2025, there were 48 class 311D completed, of which 27 are broad gauge 311Da units for PKP LHS, where they are designated ST40s.

Specification

The locomotive is a modernisation of the popular Soviet locomotive M62 (ST44), which can be noticed by the chassis structure and carriages. The drive unit has been completely changed by installing a more efficient engine by the General Electric company which is placed in one place together with the main generator, compressor and fan. The most visible change is the complete change of the structure, the internal passageway between the cabins, having a driver's cab at each end and that the train has transitions outside with the jetties. By using the graft this has improved access to the engine. The front of the locomotive has been changed, giving a new look. The cabin has a new design and provides better working conditions.

Service

The first locomotives were built in 2007.

Country Owner User Type Designation Number
units 		Source
Poland PKP LHS 311Da ST40s 27 1
Akiem DB Cargo Polska 311D 311D 15
Akiem CTL Logistics 311D 311D 3
Akiem Colas Rail Polska 311D 311D 2
Total: 47 23
References

References

  1. "Newag dostarcza lokomotywy 311Da do PKP LHS przed terminem" (in Polish). Retrieved 2018-08-02.
  2. Railcolor News (2022-03-09). "[Data] Newag and GE Transportation 311D/311Da". Railcolor News. Retrieved 2022-03-18.
  3. Nicolas Biały (2017-08-21). "[PL] Modernization time; more 311Da for PKP LHS". Railcolor News. Retrieved 2022-03-18.
Sources

Sources

  • Pokropiński, Bogdan (2009). Lokomotywy spalinowe produkcji polskiej. Warsaw: WKiL. ISBN 978-83-206-1731-3.
External links