South African Class 34-400

South African Class 34-400

No. 34-401 at Kaalfontein, Gauteng, 7 October 2009
Type and origin
Power type Diesel-electric
Designer General Electric
Builder SA GE-DL Locomotive Group
Serial number 38623-38722
Model GE U26C
Build date 1973-1974
Total produced 100
Specifications
AAR wheel arr. C-C
UIC class Co'Co'
Gauge 3 ft 6 in (1,067 mm) Cape gauge
Wheel diameter 915 mm (36.0 in)
Wheelbase 13,004 mm (42 ft 8.0 in)
  Bogie 3,188 mm (10 ft 5.5 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 0.5 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) mod.
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 Elliott H-581 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 reservoir cap 825 litres (181 imp gal)
Compressor cap 0.039 m3/s (1.4 cu ft/s)
Exhauster cap 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% adhesion
  Continuous 218 kN (49,000 lbf) @ 26 km/h (16 mph)
Factor of adh.:
  Starting
25%
  Continuous 20%
Loco 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
Kenya Railways
Sheltam
Sasol
Blue Circle
Transnet Freight Rail
Class Class 34-400
Number in class 100
Numbers 34-401 to 34-500
Delivered 1973-1974
First run 1973

The South African Railways Class 34-400 of 1973 is a diesel-electric locomotive.

Between April 1973 and November 1974, the South African Railways placed one hundred Class 34-400 General Electric type U26C diesel-electric locomotives in service.[1]

Manufacturer

The Class 34-400 type GE U26C diesel-electric locomotive was designed by General Electric (GE) and built for the South African Railways (SAR) by the South African General Electric-Dorman Long Locomotive Group (SA GE-DL, later Dorbyl). One hundred locomotives were delivered between April 1973 and November 1974, numbered in the range from 34-401 to 34-500.[1][2][3]

Class 34 series

GE and GM-EMD designs

The Class 34 locomotive family consists of seven series, the GE Classes 34-000, 34-400, 34-500 (also known as 34-400 ex Iscor) and 34-900, and the General Motors Electro-Motive Division (GM-EMD) Classes 34-200, 34-600 and 34-800. Both these manufacturers also produced locomotives for the South African Classes 33, 35 and 36.[1]

Distinguishing features

As built, the GE Class 34-000, 34-400 and 34-900 locomotives were visually indistinguishable from each other. The Class 34-500 locomotives could be visually distinguished from the other series by the air conditioning units mounted on their cab roofs and initially, when it was still a feature unique to them, by their running board mounted handrails. 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 behind the cab on the sides. Since then Class 34-900 locomotives could be distinguished from the older models by the absence of the saddle filter.[4][5][6]

Modifications

Fuel capacity

As built, the Class 34-400 has 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, in order to cope with the lack of en route refuelling points on the Sishen-Saldanha iron ore line. To facilitate the larger fuel tank, the inter-bogie linkage, found on all other models, had to be omitted on the Class 34-500.[7]

In order to be usable on the iron ore line, Class 34-400 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 below, 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.[8]

Standard 5,400 litre fuel tank
Enlarged 7,000 litre fuel tank

Running board mounted handrails

Class 34-40 locomotives which are allocated to the Sishen-Saldanha Orex line, are often 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]

Since c. 2009, other mainline diesel-electric locomotive types also emerged from the Koedoespoort Transwerk shops with running board mounted handrails, after major overhauls.[9]

Electronic control system

Beginning in 2010, some locomotives were equipped with electronic fuel injection and GE "Brite 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.

Service

South African Railways

GE Class 34-400s 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, near Kathu in the Northern Cape, to the harbour at Saldanha in the Western Cape.[3]

On the Sishen–Saldanha Orex line, GE Class 34 series diesel-electric locomotives run consisted to Class 9E or Class 15E electric locomotives, to haul the 342 wagon iron ore trains. Each wagon 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 GE U26C Class 34-000, 34-400, 34-500, 34-900 and, from 2012, 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][10][11]

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

Leased and sold

Eleven Class 34-400s were leased to the Kenya Railways for some years, regauged to 1,000 mm (3 ft 3 38 in) and renumbered in the range from 9501 to 9511. They were returned to Spoornet in April 2002.[2]

Several Class 34-400s were sold into industry. No. 34-429 went to the Douglas Colliery near Witbank as no. D10. Five went to Sasol at Trichardt near Secunda and two to Blue Circle Cement at Lichtenburg.[2]

No. 34-426, with the bodywork removed, is used for apprentice training at the Germiston diesel depot.[2]

Works numbers

The Class 34-400 builder’s works numbers and known deployment are listed in the table.[2]

Illustration

The main picture shows no. 34-401 in Spoornet blue livery with outline numbers. Other liveries which were applied to Class 34-400 locomotives are illustrated below.

References

  1. 1 2 3 4 5 South African Railways Index and Diagrams Electric and Diesel Locomotives, 610mm and 1065mm Gauges, Ref LXD 14/1/100/20, 28 January 1975, as amended
  2. 1 2 3 4 5 Middleton, John N. (2002). Railways of Southern Africa Locomotive Guide - 2002 (as amended by Combined Amendment List 4, January 2009) (2nd, Dec 2002 ed.). Herts, England: Beyer-Garratt Publications. pp. 38, 40–41, 45–46.
  3. 1 2 Paxton, Leith; Bourne, David (1985). Locomotives of the South African Railways (1st ed.). Cape Town: Struik. pp. 140–141. ISBN 0869772112.
  4. 34-434 with saddle filter, 23 September 2009
  5. 34-435 without saddle filter, March 1982
  6. 34-440 with saddle filter, 15 October 2009
  7. Information received from John Nicholas Middleton
  8. Shosholoza Meyl’s 34-102 with running board handrails
  9. Actom Divisions News, 22 July 2010
  10. Information supplied by Orex train crew members
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