South African Class 34-900
No. 34-926, in Spoornet’s orange era Blue Train livery, at Bellville Depot, Cape Town, 15 May 2010
Type and origin Power type Diesel-electric Designer General Electric Builder SA GE-DL Locomotive Group Serial number 41350-41379 Model GE U26C Build date 1980 Total produced 30
Specifications Configuration: ​  • AAR C-C  • UIC Co'Co'  • Commonwealth Co+Co Gauge 3 ft 6 in (1,067 mm) Cape gauge Wheel diameter 915 mm (36 in) Wheelbase 13,004 mm (42 ft 8 in) ​  • Bogie 3,188 mm (10 ft 6 in) Pivot centres 10,058 mm (33 ft 0 in) Length: ​  • Over couplers 17,982 mm (59 ft 0 in) Width 2,756 mm (9 ft 1 in) Height 3,962 mm (13 ft 0 in) Axle load 18,850 kg (41,560 lb) Adhesive weight 113,100 kg (249,300 lb) Loco weight 113,100 kg (249,300 lb) max Fuel type Diesel Fuel capacity 5,400 litres (1,200 imp gal) as built 7,000 litres (1,500 imp gal) modified Prime mover GE 7FDL-12 RPM range 450-1,050 ​  • RPM low idle 450  • RPM idle 535  • Maximum RPM 1,050 Engine type 4-stroke diesel Aspiration GE 7S14O8A1 turbocharger Alternator 10 pole 3 phase GE 5GT-A11C1 Traction motors Six GE 5GE-761A13 DC 4 pole ​  • Rating 1 hour 665A  • Continuous 655A @ 24 km/h (15 mph) Cylinders V12 Gear ratio 92:19 MU working 6 maximum Loco brake 28-LAV-1 with vigilance control Train brakes Westinghouse 6CDX4UC compressor/exhauster Air tank cap. 825 litres (181 imp gal) Compressor 0.039 m3/s (1.4 cu ft/s) Exhauster 0.155 m3/s (5.5 cu ft/s) Couplers AAR knuckle type E
Performance figures Maximum speed 100 km/h (62 mph) Power output: ​  • Starting 2,050 kW (2,750 hp)  • Continuous 1,940 kW (2,600 hp) Tractive effort: ​  • Starting 272 kN (61,000 lbf) @ 25% adh.  • Continuous 218 kN (49,000 lbf) @ 26 km/h (16 mph) Factor of adh.: ​  • Starting 25%  • Continuous 20% Brakeforce 60% ratio @ 345 kPa (50.0 psi) Dynamic brake peak effort 180 kN (40,000 lbf) @ 29 km/h (18 mph)
Career Operators South African Railways Spoornet Transnet Freight Rail Class Class 34-900 Number in class 30 Numbers 34-901 to 34-930 Delivered 1980-1981 First run 1980

The South African Railways Class 34–900 of 1980 is a diesel-electric locomotive.

In 1980 and 1981, the South African Railways placed thirty Class 34–900 General Electric type U26C diesel-electric locomotives in service.^[1]

The Class 34-900 type GE U26C diesel-electric locomotive was designed by General Electric and built for the South African Railways (SAR) by the South African General Electric-Dorman Long Locomotive Group (SA GE-DL, later Dorbyl). Thirty locomotives were delivered in 1980 and 1981, numbered in the range from 34-901 to 34-930.^[1][2][3][4]

As built, the GE Classes 34-000, 34-400 and 34-900 were visually indistinguishable from each other. The ex Iscor Class 34-500 loco­motives could be visually dis­ting­uished from the other series by the air conditioning units mounted on the cab roofs of most of them and initially, when it was still a feature unique to them, by their running board-mounted handrails.^[5]

At some stage during the mid-1980s, all Class 34-000, 34-400 and 34-500 locomotives had saddle filters installed across the long hood, mounted just to the rear of the screens on the sides behind the cab. Since then, Class 34-900 locomotives could be distinguished from the older models by the absence of the saddle filter.^[5]

As built, the Class 34-900 had a 5,400 litres (1,200 imperial gallons) fuel tank and interlinked bogies, while the Class 34-500 was delivered new to Iscor with a 7,000 litres (1,500 imperial gallons) fuel tank to cope with the lack of en route refueling points on the Sishen-Saldanha iron ore line. To accommodate the larger fuel tank, the inter-bogie linkage found on all other models was omitted on the Class 34-500.^[6]

To be usable on the iron ore line, Class 34-900 locomotives which ended up working there were modified to a similar fuel capacity. The inter-bogie linkage was removed and the fuel tank was enlarged by changing it from saddle-shaped to rectangular box-shaped. To maintain its lateral balance, a slab of metal was attached to each bogie in place of the removed linkage. In the second picture, the weld lines on the end of the enlarged fuel tank as well as the metal slab at the end of the bogie are visible.^[7]

Class 34-900 locomotives which are allocated to the Sishen-Saldanha Orex line are usually further modified by having removable running board-mounted handrails installed. All South African diesel-electric locomotives have their side handrails mounted along the upper edges of their long hoods. The ex Iscor Class 34-500s, however, came equipped with additional removable running board-mounted handrails. Since these handrails are slide-fit into brackets welded onto the running board, they are easily removed.^[1][5]

Beginning in 2010, some locomotives were equipped with electronic fuel injection and GE Bright Star control systems. On some of the first locomotives which were so modified, externally visible evidence of the modification is a raised middle portion of the long hood. All Bright Star-equipped locomotives emerged from this modification repainted in the Transnet Freight Rail livery.

Class 34-900 locomotives work on most mainlines and some branchlines in the central, western, southern and southeastern parts of the country. Some eventually joined the Class 34-500 on the 861 kilometres (535 miles) Sishen-Saldanha iron ore line to haul export ore from the open cast iron mines at Sishen in the Northern Cape to the harbour at Saldanha in the Western Cape.^[4]

On the Sishen–Saldanha Orex line, GE Class 34 series diesel-electric locomotives run consisted to Class 9E and Class 15E electric locomotives to haul the 342-truck iron ore trains. Each truck has a 100-ton capacity and the trains are at least 3.72 kilometres (2.31 miles) in length, powered by mixed consists of Class 9E and Class 15E electric and type GE U26C Class 34-000, 34-400, 34-500, 34-900 and, from 2012, type GE C30ACi Class 43-000 diesel-electric locomotives. In South Africa, mixed electric and diesel-electric consists are unique to the iron ore line.^[1][8][9]

Ore train about 100 kilometres (62 miles) north of Lamberts Bay

The Class 34-900 builder's works numbers are listed in the table.^[2]

All but seven Class 34-900 locomotives were delivered in the SAR Gulf Red livery with signal red buffer beams, yellow side stripes on the long hood sides and a yellow V on each end. In the 1990s many of the Class 34-900 units began to be repainted in the Spoornet orange livery with a yellow and blue chevron pattern on the buffer beams. In the late 1990s many were repainted in the Spoornet blue livery with outline numbers on the long hood sides. After 2008 in the Transnet Freight Rail (TFR) era, many were repainted in the TFR red, green and yellow livery.^[2][10]

The seven exceptions, numbers 34-924 to 34-930, were painted in the SAR Blue Train livery and took the place of the five SAR Blue Train liveried Class 34-000 locomotives, numbers 34-055 to 34-059 which were then all eventually repainted in Spoornet's orange livery. Some of the Class 34-900 locomotives, numbers 34-925 to 34-927, 34-929 and 34-930, were later repainted in Spoornet's orange era Blue Train livery, while the other two, numbers 34-924 and 34-928, received the Spoornet blue with outline numbers livery.^[2]

• 
  No. 34–911 in SAR Gulf Red and whiskers livery, Bloemfontein, 30 April 2013
• 
  No. 34–917 at Bellville, Cape Town, Western Cape, in Spoornet orange livery, 25 October 2007
• 
  No. 34–928 at Warrenton, Northern Cape, in Spoornet blue livery with outline numbers, 24 August 2007
• 
  "Bright Star" equipped no. 34–913 in Transnet Freight Rail livery at Addo, Eastern Cape, 13 July 2012

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