V/Line G class

At the same time Australian National had placed an order with Clyde Engineering, Rosewater for 10 BL class locomotives, with an option for a further five. VicRail's chairman Alan Reiher, stepped in and negotiated for the five to be completed for the newly formed V/Line.[2][3] The new diesels had a much higher axle load than the smaller T and Y class diesels used on branch lines, with these lines either being upgraded to carry heavier trains or closed.[2] These were all delivered in late 1984.[4][5]

A second order was placed for ten further units that were more tailored to V/Line's requirements. The first five were built with standard gauge bogies being delivered via Sydney. Over the next few years members of the second batch would frequently swap gauges as needs dictated. In July 1986 through running without changing locomotives at Albury began with G class locomotives operating through to Sydney.[6] Two further contracts for eleven and seven broad gauge units had brought the fleet up to 33 by November 1989.[5][7] The first 15 were built at Clyde Engineering's, Rosewater factory with the balance built at Somerton.[8]

Although primarily intended for hauling freight services, they were also used on passenger trains such as the Intercapital Daylight and Sydney/Melbourne Express.[9] They rarely hauled broad gauge passenger trains.[10]

When National Rail commenced operating interstate services in the mid 1990s seven (517-520, 522, 523 & 525) were leased by V/Line pending the delivery of the NR class.[11][12]

The class were also used on the first privately operated train on government tracks in Australia, operated by SCT Logistics with V/Line locomotives and crews between Melbourne and Adelaide on 13 July 1995.[2] This was extended through to Perth from October 2000.[13]

All 31 were included in the sale of V/Line Freight to Freight Victoria in March 1999. On 26 November 1999, G517 and G518 were destroyed in a head-on collision at Ararat when an eastbound grain train collided with a stationary ballast train at 70 km/h.[10][14]

Freight Australia commenced a program of engine upgrades purchasing new engines for some of the G class, with the old engines being used to repower X class locomotives, later recoded the XR class.[15][16]

In the early 2000s Freight Australia was contracted to move freight between Melbourne and Sydney for CRT Group. The contract contained a clause that if Freight Australia was acquired by a competitor of CRT Group, 10,000 hp (7,500 kW) of locomotive power (calculated by the business CRT Group was offering Freight Australia) was to be transferred to CRT Group.[17] As a result, when Freight Australia was acquired by Pacific National in 2004 G516 & G534 were handed over to QR National along with X53 & X54.

A condition imposed by the Australian Competition & Consumer Commission on Toll Holdings taking control of Pacific National was that nine locomotives be sold to SCT Logistics.[18][19][20] This resulted in nine G class passing to SCT Logistics in February 2007.

By mid 2008 SCT Logistics had received new locomotives, and their G classes were sold to the Australian Wheat Board, Chicago Freight Car Leasing Australia and Southern Shorthaul Railroad.[5]

Pacific National's fleet operate on both the broad and standard gauges, with the latter often operating in New South Wales. G516 and G534 Linx Cargo Group

Auscision Models has announced a future project including G Class Mark 1 locomotives - G511, 512 in early V/Line orange/grey and Freight Australia green/yellow (and 512 only in Chicago Freight Car Leasing Australia blue/grey), 513 and 514 in late V/Line orange/grey, Specialised Container Transport red/white and Southern Shorthaul Railroad yellow/black, 515 in Freight Victoria green/yellow and in Chicago Freight Car Leasing Australia blue/grey.[22] The models are expected to be delivered either as DC, or for an additional charge they could be pre-fitted with DCC and Sound.

Austrains in 2014 released models of the G class locomotive retailing at about $300 per model, and originally intended to include the option of pre-fitted DCC and Sound for an additional $100.. The range included "G 220" in VR Blue and Gold, using the body shell of a Series 1 type; in V/Line the locomotives included G 511, 518, 523 and 531. Freight Australia locomotives included G 513, 521 and 539, and the Pacific National models include 532, 535 and 540.[23]

Powerline released models of the first two batches of G class locomotives in V/Line Orange in 1989, then with a new motor type in 1997. The first run included G 513, 515, 521 and 523 with a single motor, and 512, 514, 522 and 524. The second run had G 511, 513 with single motors and 512 with dual motors.[24]