EMD G22C Series

EMD G22C Series

Taiwan Railway Administration EMD G22CU #R171 at Sincheng (Taroko) Station
Type and origin
Power type Diesel-electric
Builder Astarsa, Equipamentos Villares S.A., Electro-Motive Division, General Motors Diesel, Henschel & Sohn GmbH, MACOSA
Model G22CW, G22CU, G22CU-2, GL22C, GL22C-2
Build date February 1969 - August 2001
Total produced 220
AAR wheel arr. C – C
UIC class Co’– Co’
Gauge 4 ft 8 12 in (1,435 mm) or
3 ft 6 in (1,067 mm)
Driver dia. 40 in (1,016 mm)
Wheelbase 11 ft 11 in (3.63 m) between bolsters;
6 ft 6 in (1.98 m) between axles in each truck
Length 46 ft 6 in (14.17 m))
over the coupler pulling faces
Width 9 ft 3 in (2,819 mm) over the grabirons
Height 12 ft 6 1516 in (3,834 mm)
Loco weight 84 t (82.7 long tons; 92.6 short tons)
Fuel capacity 1,700–2,000 US gal (6,400–7,600 L; 1,400–1,700 imp gal)
Prime mover 12-645E
Aspiration Roots Blower
Cylinders V12
Performance figures
Maximum speed 65–93 miles per hour (105–150 km/h)
Power output 1,500–1,650 hp (1,120–1,230 kW)
Nicknames "Pup”
Locale Argentina, Brazil, Sri Lanka, Guinea, Liberia, Morocco, Mali, Nigeria, Pakistan, Peru, Senegal, Taiwan

The EMD G22 Series were first introduced in 1968 to replace the popular G12 along with various improvements. They carried a low per axle weight on their Flexicoil Type-GC trucks and were the first model series to have a low nose as a standard option as well.

The G22 series now carried a U or W suffix after the model designation to indicate the type of traction motors. A C indicated six axle trucks, while a 4 indicated A-1-A- trucks; although there never has been an indication of four axle A-1-A trucks until 1993.

The designations could apply to any kind of export locomotive design of EMD or another licensee of EMD as long as the electrical & mechanical gear was left unaltered.


With the introduction of the 645 engine for export models in 1967, the model designation numbers changed by adding 10. To meet customer demands of a six axle version of the popular G12, EMD created the GR12 which was slightly longer and taller to accommodate the six axle Type-GC trucks.

Although the orders lacked for the GR12 due to the weight and size of the locomotive, EMD revised and designed the lighter G22 series model to accommodate the Flexicoil Type-C truck and introducing the new EMD 645 series engine. With relocation of the batteries within the carbody and increasing the fuel tank capacity, the G22C series was the same length to that of its four axle counterpart, the G22. Production spanned longer than the four axle G22 version, but with smaller orders.

Several models were introduced:


G22CW In Sri Lanka - Class M6 Locomotive

The EMD G22CW was first introduced in 1969. Unlike its predecessor GR12, the G22CW now carried a CW suffix which indicated that this model had six axles (C) and traction motors that could fit from standard gauge rails to 5 ft 6 in (1,676 mm) gauge rails (W).

The G22CW found most of its popularity in Argentina and Sri Lanka, as the largest order were each placed by them with 15 units.

Production spanned from July 1976 to November 1990

GM G22CW orders
Builder Country Railroad Quantity Road numbers Notes
EVSA Peru Centromin 1 39 The only G22C built by Equipamentos Villares S.A.
EMD Peru Cerro de Pasco 1 38 The First G22CW built
ASTARSA Argentina Ferrocarriles Argentinos 40 7901 – 7940
Thyssen Henschel Sri Lanka Sri Lanka Railways 16 783 – 798 Imported to Sri Lanka in 1979. Still in operation.


Main article: EMD G22CU

The EMD G22CU first appeared in 1969. Designed mainly for the narrow gauge market, the G22CU now carried a CU suffix which indicated that this model had six axles (C) and traction motors that could fit from one meter gauge to 5 ft 6 in gauge rails (U).

The G22CU found most of its popularity in Pakistan, as older locomotives were being replaced.

Production spanned from February 1969 to June 1982.

EMD G22CU Orders
Builder Country Railroad Quantity Road Numbers Notes
EMD Chile Ferrocarril de Antofagasta a Bolivia 2 1410 – 1411 #1410 is the first G22CU built
EMD Mali Chemin de Fer du Mali 2 CC1671 – CC1672 1 meter gauge
EMD & ASTARSA Argentina Ferrocarriles Argentinos 96 7701 – 7720 built by General Motors; 7721 – 7796 Assigned to Ferrocarril General Belgrano; 7721 – 7796 built by ASTARSA
EMD Liberia National Iron Ore Co. Ltd. 2 28 – 29
EMD & GMD Pakistan Pakistan Railways 62 4801 – 4832, 4901 – 4930 4801 – 4832 built by EMD, 4901 – 4930 built by GMD
EMD Taiwan Taiwan Railway Administration 25 R151 – R175
MACOSA Brazil Viação Férrea do Rio Grande do Sul (RFFSA) 24 6201 – 6224 Built during the Brazilian Miracle era


Beginning on January 1, 1972, export locomotives now had the option to carry EMD Dash 2 electronics, adding the (-2) suffix to the locomotive model. Only Argentina and Taiwan purchased the G22CU-2.

Production spanned from March 1992 to August 2001

EMD G22CU-2 Orders
Builder Country Railroad Quantity Road Numbers Notes
EMD Argentina Belgrano Sur Line 5 MF701 – MF705
EMD Taiwan Taiwan Cement 6 R191 – R196
EMD Taiwan Taiwan Railway Administration 10 R181 – R190


When most second and third world railroads couldn’t operate standard EMD Locomotives due to their weight, EMD introduced the L suffix which indicated the locomotive had a lightweight frame. The locomotive designation was now changed to GL22C. However, as these locomotives had a much lighter frame, the application of the U or W suffixes no longer applied.

Production spanned from December 1971 to May 1977

EMD GL22C Orders
Builder Country Railroad Quantity Road Numbers Notes
Henschel & Son Mali Chemin de Fer du Mali 2 CC1681 – CC1682
EMD Nigeria Nigerian Railway Corporation 30 1126 – 1155
EMD Guinea Office National du Chemin de Fer de Guinée 2 CC1601 – CC1602
Henschel & Son Senegal Régie des Chemins de Fer du Senegal 2 CC1701 – CC1703
EMD Morocco Société Ferrite de Rif 2 1 – 2


Being the rarest of the G22C series, the GL22C-2 model combined a lightweight frame and the new EMD Dash 2 electronics.

Production was only for with the Queensland Rail being the sole purchaser.

EMD GL22C-2 Orders
Builder Country Railroad Quantity Road Numbers Notes
Clyde Engineering Australia Queensland Rail 24 2400 – 2423 2400 class
Clyde Engineering Australia Queensland Rail 18 2450 – 2467 2450 class
Clyde Engineering Australia Queensland Rail 38 2470 – 2507 2470 class



Only two general variations have been noticed during the G22C production.

Phase 1: Larger frame sill, air reservoir slung under skirting.

Phase 2: Smaller frame sill, air reservoir exposed, and two horizontal bars along intake grilles.

There have been various as-modifications on railroads as well, but are excluded due to various degrees of completion on the modification.


The G22CU/G22CW model is represented in HO Scale by Frateschi trains of Brazil. Due to the accommodation of the motor, the model is not entirely accurate.

See also


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