Downer EDI Rail GT42CU AC

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Pacific National PN002 & Queensland Rail 4046 under construction at EDi Rail, Maryborough in November 2004
Type and origin
Power type Diesel-electric
Builder EDi Rail, Maryborough
Model Electro-Motive Diesel GT42CU AC
Build date 1999-2005
Total produced 62
 • UIC Co'Co'
Gauge 1,067 mm (3 ft 6 in)
Length 20.8 m (68 ft 3 in)
Width 2.85 m (9 ft 4 in)
Height 3.87 m (12 ft 8 in)
Loco weight 120 t (120 long tons; 130 short tons)
Fuel type Diesel
Prime mover Electro-Motive Diesel 710G3B-ES2
Engine type V12 Diesel engine
Alternator Electro-Motive Diesel TA12-QBE/CA7C (4000 class)
Traction motors Siemens 1TB 2622
Cylinders 12
Cylinder size 11.63 L (710 cu in)
? x ?
Loco brake Dynamic
Train brakes NYAB/Knorr CCB II
Performance figures
Maximum speed 100 km/h (62 mph)
Power output 2,460 kW (3,300 hp)
Tractive effort 460 kN (100,000 lbf)
Operators Pacific National
Queensland Rail
Number in class 62
Numbers 4001-4049
Delivered 23 October 1999
Current owner Aurizon
Pacific National
Disposition 62 in service

The GT42CU AC is a model of diesel electric locomotives manufactured by EDi Rail, Maryborough between 1999 and 2005 under licence from Electro-Motive Diesel, for use on narrow gauge railways in Queensland.


In March 1998 Queensland Rail ordered 38 GT42CU ACs from Clyde Engineering.[1] They were the first locomotives ordered from Clyde Engineering after its takeover by Evans Deakin Industries and were built at the latter's Maryborough factory.[2]

Designated the 4000 class, the first was delivered in October 1999.[3] After an extensive evaluation process the first entered service in May 2000 with all in service by May 2001.A further 11 were ordered in March 2003 and entered service in 2004/05.[4][5]

They are primarily used on the Blackwater and Moura coal networks, and on phosphate trains between Mount Isa and Townsville. All were included in the transfer of Queensland Rail's freight business to QR National in July 2010.[6]

In February 2004 Pacific National ordered 13 GT42CU ACs to commence operations in Queensland. Designated the PN class, they entered service in 2005 and are used on intermodal services on the North Coast line between Brisbane and Cairns.[4][7][8][9][10]

The design evolved into the GT42CU ACe which has different computer system and traction motors.


Operator Class Number in class Road numbers Built
Aurizon 4000 49 4001-4049 1999-05
Pacific National PN 13 PN001-PN013 2005

Related Development[edit]


  1. ^ "QR Orders AC Drive Locomotives and New Coal Wagons" Railway Digest April 1998 page 11
  2. ^ "Narrow Gauge Big Power - QR's 4000 Class GT42CU Locomotives" Railway Digest May 1998 page 13
  3. ^ "QR's 4000 class AC Traction units" Railway Digest December 1999 pages 26, 42
  4. ^ a b Oberg, Leon (2010). Locomotives of Australia 1850s-2010s. Kenthurst: Rosenberg Publishing. p. 428. ISBN 9781921719011. 
  5. ^ 4000 Class Railpage
  6. ^ EDI/EMD 4000 Class Queensland's Rail Interest Group
  7. ^ Pacific National looks north Railway Gazette 1 February 2004
  8. ^ New Technology for the Queensland Rail Network Archived 10 November 2013 at the Wayback Machine. Pacific National
  9. ^ EDI/GM PN Class Queensland's Rail Interest Group
  10. ^ PN Class Railpage