Candy coloured 7318 shunts Grafton yard in January 1986
Type and origin
Power type
Diesel-hydraulic
Builder
Walkers Limited, Maryborough
Model
G.H. 700
Build date
1970-1973
Total produced
50
Specifications
Configuration:
• AAR
B-B
• UIC
B'B'
Gauge
4 ft 8+1⁄2 in (1,435 mm) standard gauge
Wheel diameter
40 in (1,016 mm)
Wheelbase
26 ft 6 in (8.08 m)
Length
Over headstocks: 36 ft 0 in (10.97 m), Over buffers: 39 ft 4 in (11.99 m)
Width
9 ft 3 in (2.82 m)
Height
13 ft 6 in (4.11 m)
Axle load
12 long tons 5 cwt (27,400 lb or 12.4 t)
Loco weight
49 long tons 0 cwt (109,800 lb or 49.8 t)
Fuel type
Diesel
Fuel capacity
500 imp gal (2,300 L; 600 US gal)
Lubricant cap.
Engine: 42 imp gal (190 L; 50 US gal), Transmission: 58 imp gal (260 L; 70 US gal), Final drive: 3.25 imp gal (14.8 L; 3.90 US gal)
Coolant cap.
80 imp gal (360 L; 96 US gal)
Sandbox cap.
10 cu ft (0.28 m3)
Prime mover
Caterpillar D379 series B
RPM range
550-1400
Engine type
Four-stroke V8 diesel
Aspiration
Turbocharged
Cylinders
8
Cylinder size
6.25 in × 8 in (159 mm × 203 mm)
Transmission
Voith L4r4U2, with Gmeinder Type GM170/EHA/469 and GM170/E/327B final drives
Performance figures
Maximum speed
40 mph (64 km/h)
Power output
Gross: 700 hp (522 kW), For traction: 650 hp (485 kW)
Tractive effort
Continuous: 25,000 lbf (111.21 kN) at 5.4 mph (8.69 km/h)
Career
Operators
NSW Department of Railways
Number in class
50
Numbers
7301-7350
First run
5 October 1970
Preserved
7307, 7320, 7321, 7324, 7329, 7335, 7344, 7350
Current owner
Invicta Sucrogen Mackay Sugar Plane Creek Sucrogen Proserpine Mill
Disposition
15 in service, 8 preserved, 16 stored, 11 scrapped
The 73 class is a diesel-hydraulic locomotive built by Walkers Limited, Maryborough for the New South Wales Department of Railways between 1970 and 1973.
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