EMD G22C Series

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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, GL22MC Build date February 1969 - August 2001 Total produced 410
Specifications Configuration: ​  • AAR C–C  • UIC Co′–Co′ Gauge 4 ft 8+1⁄2 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+15⁄16 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 EMD 12-645E Aspiration Roots blower Cylinders V12
Performance figures Maximum speed 65–93 miles per hour (105–150 kilometres per hour) Power output 1,500–1,650 hp (1,120–1,230 kW)
Career Nicknames "Pup” Locale Argentina, Brazil, Sri Lanka, Guinea, Liberia, Morocco, Mali, Nigeria, Pakistan, Peru, Senegal, Taiwan

The EMD G22C 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 C trucks, while a 4 indicated six-axle A1A trucks (only four of them powered); although there never has been an indication of A1A 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
• G22CU
• G22CU-2
• GL22C
• GL22C-2
• GL22MC

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

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.

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

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

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 Queensland Rail, who were the sole purchaser.

• New Zealand DF Class 30
• Togo Rail S.A CC class 1651 to 1653.

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. Due to the accommodation of the motor, the model is not entirely accurate.

• List of EMD locomotives
• List of GMD Locomotives
• EMD G22CU
• Brazilian Miracle
• RFFSA
• Astarsa

• Electro-Motive Division Export GM Models
• Astilleros Argentinos Rio de la Plata S.A. GM Export Models
• Material Y Construcciones S.A. GM Export Models
• Henschel und Sohn GmbH GM Export Models
• Equipamentos Villares S.A. GM Export Models
• General Motors Diesel Division Export Models
• Frateschi G22CU HO Scale Model
• GM G22CU Data Sheet Archived 2016-03-03 at the Wayback Machine
• EMD G22CU Article in Portuguese