New South Wales 48 class locomotive

Specifications
Specifications
Configuration:;
• UIC	Co-Co
Gauge	4 ft 8+1⁄2 in (1,435 mm) standard gauge
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)
Axle load	4801–4885:; 12 long tons 6 cwt (27,600 lb or 12.5 t); 4886–48165:; 12 long tons 16 cwt (28,700 lb or 13 t)
Loco weight	4801–4885:; 74 long tons 0 cwt (165,800 lb or 75.2 t); 4886–48165:; 76 long tons 12 cwt (171,600 lb or 77.8 t)
Fuel type	Diesel
Fuel capacity	4801–4885:; 500 imp gal (2,300 L; 600 US gal); 4886–48165:; 700 imp gal (3,200 L; 840 US gal)
Lubricant cap.	116 imp gal (530 L; 139 US gal)
Coolant cap.	90 imp gal (410 L; 110 US gal)
Sandbox cap.	10 cu ft (0.28 m3)
Prime mover	Alco 6-251B
RPM range	375–1025
Engine type	Four-stroke Inline diesel
Aspiration	Turbocharged
Generator	4801–4845: ; General Electric 5GT 584; 4846–48165: Associated Electrical Industries TG 3602
Traction motors	4801–4885:; General Electric 761; 4886–48165:; Associated Electrical Industries 253 CT
Cylinders	6
Cylinder size	9 in × 10.5 in (229 mm × 267 mm)

Type and origin
Type and origin
Power type	Diesel-electric
Builder	AE Goodwin, Auburn
Serial number	Alco 83701–83720, 83816–83825, 84121–84135; Alco G-3387-01 to G3387-40; Alco G-3420-01 to G-3420-40; Alco G-6013-01 to G-6013-40
Model	Alco DL531
Build date	1959–1970
Total produced	165

NSW 48 class
NSW 48 class
	Transport Heritage NSW's 4807 leading the Picnic Train on a shuttle to Wollongong in June 2022
Power type
Type and origin
Power type	Diesel-electric
Builder	AE Goodwin, Auburn
Serial number	Alco 83701–83720, 83816–83825, 84121–84135; Alco G-3387-01 to G3387-40; Alco G-3420-01 to G-3420-40; Alco G-6013-01 to G-6013-40
Model	Alco DL531
Build date	1959–1970
Total produced	165
Configuration:;
Specifications
Configuration:;
• UIC	Co-Co
Gauge	4 ft 8+1⁄2 in (1,435 mm) standard gauge
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)
Axle load	4801–4885:; 12 long tons 6 cwt (27,600 lb or 12.5 t); 4886–48165:; 12 long tons 16 cwt (28,700 lb or 13 t)
Loco weight	4801–4885:; 74 long tons 0 cwt (165,800 lb or 75.2 t); 4886–48165:; 76 long tons 12 cwt (171,600 lb or 77.8 t)
Fuel type	Diesel
Fuel capacity	4801–4885:; 500 imp gal (2,300 L; 600 US gal); 4886–48165:; 700 imp gal (3,200 L; 840 US gal)
Lubricant cap.	116 imp gal (530 L; 139 US gal)
Coolant cap.	90 imp gal (410 L; 110 US gal)
Sandbox cap.	10 cu ft (0.28 m3)
Prime mover	Alco 6-251B
RPM range	375–1025
Engine type	Four-stroke Inline diesel
Aspiration	Turbocharged
Generator	4801–4845: ; General Electric 5GT 584; 4846–48165: Associated Electrical Industries TG 3602
Traction motors	4801–4885:; General Electric 761; 4886–48165:; Associated Electrical Industries 253 CT
Cylinders	6
Cylinder size	9 in × 10.5 in (229 mm × 267 mm)
Maximum speed
Performance figures
Maximum speed	75 mph (121 km/h) (Design speed) ; 100 km/h (62 mph) (TfNSW limit)
Power output	Gross: ; 1,050 hp (780 kW),; For traction: ; 950 hp (710 kW)
Tractive effort	Continuous: ; 4801–4885: 40,200 lbf (178.82 kN); at 8 mph (13 km/h); 4886–48165:; 42,500 lbf (189.05 kN); at 6.5 mph (10 km/h)
Operators
Career
Operators	NSW Department of Railways
Number in class	165
Numbers	4801–4805, Bruce, 4807-48165
First run	September 1959
Preserved	4803, 4807, 4821, 4822, 4833, 4872
Current owner	Graincorp, Greentrains, Junee Railway Workshop, Pacific National, RailCorp, Southern Shorthaul Railroad
Disposition	96 Scrapped, 53 Operational, 12 Stored, 6 Preserved, 1 Under Overhaul

The 48 Class is a class of diesel locomotives built by AE Goodwin, Auburn for the New South Wales Department of Railways between 1959 and 1970. Once the most ubiquitous locomotive in New South Wales, Australia, it is based on Alco frames and prime movers, using General Electric (later Associated Electrical Industries) electrical equipment. The South Australian Railways 830 and Silverton Rail 48s classes are of a very similar design.