South African Class 32-000

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South African Class 32-000
No. 32-029 and 32-042 at Oudtshoorn,
22 September 2007
Type and origin
Power type Diesel-electric
Designer General Electric
Builder General Electric
Serial number 33722-33836
Model GE U18C1
Build date 1959-1961
Total produced 115
AAR wheel arr. 1-C+C-1
UIC class 1'C+C1'
Imperial class 1Co+Co1
Gauge 3 ft 6 in (1,067 mm) Cape gauge
Leading dia. 762 mm (30.0 in)
Wheel diameter 915 mm (36.0 in)
Wheelbase 15,246 mm (50 ft 0.2 in)
 • Bogie 4,927 mm (16 ft 2.0 in)
Pivot centres 8,128 mm (26 ft 8.0 in)
 • Over couplers 16,866 mm (55 ft 4.0 in)
Width 2,756 mm (9 ft 0.5 in)
Height 3,924 mm (12 ft 10.5 in)
Axle load 12,700 kg (28,000 lb)
 • Leading 10,160 kg (22,400 lb)
Adhesive weight 76,200 kg (168,000 lb)
Loco weight 96,520 kg (212,790 lb) max
Fuel type Diesel
Fuel capacity 4,300 litres (950 imp gal)
Prime mover Cooper-Bessemer FVBL-12
RPM range 400-1,000
 • RPM low idle 400
 • RPM idle 535
 • Maximum RPM 1,000
Engine type 4 stroke V12 diesel
Aspiration C-B ET13 turbocharger
Generator DC 10 pole GE 5GT-581C5
Traction motors Six GE 5GE-761A3 DC 4 pole
 • Rating 1 hour 600A
 • Continuous 590A @ 17 km/h (11 mph)
Gear ratio 92:19
MU working 3 maximum
Loco brake 6-SLAV-1 with vigilance control
Train brakes Westinghouse 6CDX4UC compressor/exhauster
Air reservoir cap 700 litres (150 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 SASKOP DS
Performance figures
Maximum speed 100 km/h (62 mph)
Power output:
 • Starting 1,475 kW (1,978 hp)
 • Continuous 1,340 kW (1,800 hp)
Tractive effort:
 • Starting 183 kN (41,000 lbf) @ 25% adhesion
 • Continuous 146 kN (33,000 lbf) @ 27 km/h (17 mph)
Factor of adh.:
 • Starting
 • Continuous 20%
Loco brakeforce 60% ratio @ 345 kPa (50.0 psi)
Operators South African Railways
SNCZ, Democratic Republic of the Congo
Consortium ARZ
Class Class 32-000
Number in class 115
Numbers 32-001 to 32-115
Delivered Nov 1959 to Nov 1961
First run 1959

The South African Railways Class 32-000 of 1959 was a diesel-electric locomotive.

Between November 1959 and November 1961, the South African Railways placed 115 Class 32-000 General Electric type U18C1 diesel-electric locomotives with a 1Co+Co1 wheel arrangement in service in South West Africa.[1]


The South African Class 32-000 type GE U18C1 diesel-electric locomotive was designed and built to South African Railways (SAR) requirements by General Electric (GE) and imported. They were numbered in the range from 32-001 to 32-115.[1]

Class 32 series[edit]

The Class 32 consists of two series, the high short hood Class 32-000 and the low short hood Class 32-200, both GE products and both with a 1Co+Co1 wheel arrangement. On the Class 32-000, the short hood end is the front. It has single station controls.[1]

The pony truck affair[edit]

In the United States of America, the South African Class 32-000 is credited with being a major factor in the demise of the American Locomotive Company (ALCO) and the rise of GE in the locomotive building business.[2]

In the late 1950s, South Africa, at the time one of the last bastions of steam traction, planned to embark on a massive dieselisation program. An SAR technical team was sent to Europe and to the United States to prepare an assessment of design alternatives, finalise specifications and compile a list of qualified bidders.[2]

In the United States, only ALCO, General Motors Electro-Motive Division (EMD) and GE were considered to be qualified bidders. The SAR was not very enthusiastic about two-stroke cycle engines and had a strong preference for ALCO's Model 251 engine and GE's transmission systems. As a prior supplier of steam locomotives for the SAR, ALCO appeared to be virtually assured of receiving the order.[2]

The SAR's tender for bid was issued in 1957, with two options:[2]

  • 115 1,800 horsepower (1,300 kilowatts) locomotives with a 1Co+Co1 wheel arrangement; or
  • 230 1,000 horsepower (750 kilowatts) locomotives with a Co+Co wheel arrangement
1Co bogie on no. 32-047

These units were intended for operation in South West Africa (SWA), now Namibia, under very light rail conditions which necessitated lighter axle loadings, which could not be achieved with conventional Co bogies under a heavy locomotive. General Steel Castings had a design on paper for a 1Co bogie (a Co bogie with an integral pony truck) which could be utilised by either ALCO or GE and which would enable the SAR's specification to be met for the heavier 1,800 horsepower (1,300 kilowatts) units.[2]

The SAR made it clear that, despite the two options afforded by the tender, its strong preference was for a 1Co+Co1 locomotive. However, the use of a pony truck was not universally accepted by ALCO's engineering management. The result was that ALCO bid on only the Co+Co option and lost out to GE, who had bid on both options.[2]

In South Africa, this virtually opened the floodgates for GE, since more than half of the SAR's vast diesel-electric locomotive fleet, which was acquired between 1959 and 1981, were GE products.[2]


South African Railways[edit]

Class 32-000 32-042 IDR.JPG

The Class 32-000 was designed specifically for service in SWA and most of them spent their entire SAR lives there. Between 1964 and 1976, several were also allocated to the Eastern Transvaal for service around Waterval-Boven.[3][4]

Of the original one hundred and fifteen locomotives, only five survived into the Spoornet era in the 1990s. In SWA they were replaced by the Class 33-400 during the 1980s. After being withdrawn from Spoornet service, a few were allocated to the National Collection, later the Transnet Heritage Foundation (THF), and some of these still saw occasional service as Outeniqua Choo-Tjoe excursion locomotives, based at George, Western Cape.[3]

Post SAR service[edit]

No. 32-013 at Nkana Mine, 30 September 1993

After withdrawal from SAR service, a large number of the Class 32-000 locomotives were sold to Zaire's Congo Railway (SNCZ), which became the SNCC after the country's name change to the Democratic Republic of the Congo.[3]

Three went to Consortium ARZ (CARZ), an Italian per-way contractor working in Zaire and later also in Zambia. Two went to Nchanga and three to Nkana, two of the copper mines in Zambia.[3]

The three locomotives at the Nkana Mine retained their SAR numbers whilst working at Nkana. No. 32-013 is depicted alongside, on the Nkana-Chibuluma miner's train at Nkana Mine Sidings in Zambia. The coaches behind it are second-hand Tata bus bodies, mounted on freight wagon frames and bogies. These were initially made for the Mulungushi Commuter train service in Lusaka, which was later taken over by Zambia Railways and renamed Njanji Commuter.

LEGE in Durban, who operates an active hire and overhaul business, owns two locomotives, numbers 32-070 and 32-084. Of these, no. 32-070 has been observed shunting in the Merewent Oil Refinery as late as 2014.[5]

Works numbers[edit]

The Class 32-000 builder's works numbers and disposition are listed in the table.


The main picture and the following photographs offer views of all sides of the Class 32-000 locomotive.


  1. ^ a b c 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. ^ a b c d e f g The American Locomotive Company - A Centennial Remembrance by Richard Steinbrenner
  3. ^ a b c d e f 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, 47, 67. 
  4. ^ Paxton, Leith; Bourne, David (1985). Locomotives of the South African Railways (1st ed.). Cape Town: Struik. pp. 138–139. ISBN 0869772112. 
  5. ^ SAR-L Yahoogroup message no. 47981 of 17 October 2014