ALCO DL531

Alco DL531

Specifications
Configuration:
• UIC	Co-Co
Gauge	1,067 mm (3 ft 6 in) 1,435 mm (4 ft 8 ¹⁄₂ in) 1,600 mm (5 ft 3 in)
Wheel diameter	40 in (1,016 mm)
Length	Over headstocks: 44 ft 3 in (13.49 m) Over coupler pulling faces: 48 ft 5 in (14.76 m)
Width	9 ft 9 in (2.97 m)
Height	14 ft 0 in (4.27 m)
Loco weight	74 long tons 0 cwt (165,800 lb or 75.2 t)-76 long tons 12 cwt (171,600 lb or 77.8 t)
Fuel type	Diesel
Fuel capacity	500 imp gal (2,300 l; 600 US gal)-700 imp gal (3,200 l; 840 US gal)
Prime mover	Alco 6-251B
RPM range	375–1025
Engine type	Four-stroke diesel
Aspiration	Turbocharged
Generator	General Electric 5GT 584 Associated Electrical Industries TG 3602
Traction motors	General Electric 761 Associated Electrical Industries 253 CT
Cylinders	Inline 6

Career
Operators	New South Wales Government Railways South Australian Railways Silverton Tramway
Number in class	212
Numbers	4801-48165 830-873 27-29
First run	September 1959
Preserved	4801, 4803, 4805, 4807, 4821, 4822, 4833, 866
Current owner	Genesee & Wyoming Australia Graincorp Greentrains Junee Railway Workshop Pacific National RailCorp

Specifications
Configuration:
• UIC	Co-Co
Gauge	1,067 mm (3 ft 6 in) 1,435 mm (4 ft 8 ¹⁄₂ in) 1,600 mm (5 ft 3 in)
Wheel diameter	40 in (1,016 mm)
Length	Over headstocks: 44 ft 3 in (13.49 m) Over coupler pulling faces: 48 ft 5 in (14.76 m)
Width	9 ft 9 in (2.97 m)
Height	14 ft 0 in (4.27 m)
Loco weight	74 long tons 0 cwt (165,800 lb or 75.2 t)-76 long tons 12 cwt (171,600 lb or 77.8 t)
Fuel type	Diesel
Fuel capacity	500 imp gal (2,300 l; 600 US gal)-700 imp gal (3,200 l; 840 US gal)
Prime mover	Alco 6-251B
RPM range	375–1025
Engine type	Four-stroke diesel
Aspiration	Turbocharged
Generator	General Electric 5GT 584 Associated Electrical Industries TG 3602
Traction motors	General Electric 761 Associated Electrical Industries 253 CT
Cylinders	Inline 6

Career
Operators	New South Wales Government Railways South Australian Railways Silverton Tramway
Number in class	212
Numbers	4801-48165 830-873 27-29
First run	September 1959
Preserved	4801, 4803, 4805, 4807, 4821, 4822, 4833, 866
Current owner	Genesee & Wyoming Australia Graincorp Greentrains Junee Railway Workshop Pacific National RailCorp

The Alco DL531 is a model of railroad locomotive manufactured and operated in Australia.

A total of 212 were manufactured between 1959 and 1970 by American Locomotive Company licensee AE Goodwin, Auburn.

The New South Wales Government Railways purchased 165 48 class between 1959 and 1970. They were the largest class of diesel locomotives purchased and operated services on all lines in New South Wales.

The South Australian Railways 830 class were purchased in batches between 1959 and 1970 and operated services throughout South Australia on the narrow, standard and broad gauge lines. In the early 1980s some were transferred to AN Tasrail.

The Silverton Rail purchased three narrow gauge examples for use on the Silverton Tramway line around Broken Hill.

Mass withdrawals began in the 1990s but as at February 2014 about 90 remained in use.