Onslow railway

The Onslow railway, owned by WEZCO and operated by it's Australian subsidiary WEZCO Pilbara Ore, is a private rail network in the Pilbara region of Western Australia for the purpose of carrying iron ore.

Rolling stock
To operate construction trains, WEZCO purchased a withdrawn shunter. It was overhauled at and shipped from the  to  in May 1968. To haul the iron ore trains, five engines were purchased (100-105), two being built in  and three by  in. All had been retired by 1987 with one preserved on a plinth at Hedland Yard.

From March 1970-December 1972, 36 locomotives were built by  and then  in. By 1992, all had been withdrawn. Six were sold to the and exported to, serving the iron ore-hauling railway in northeastern  for several years.

In 1982, 10 locomotives built by,  arrived in two shipments from. The F40PH engines were used on local passenger routes and to transport mining crews to different locations. The F40PH's hauled former  that were converted to standard gauge by,. Five with withdrawn in 1996 and in August 1997 were sold to and exported to the United States. After being leased to, three were sold to Ferrocarriles de Puerto Rico, and the remaining two were briefly leased to the before being sold to WNY Runner in 2006. The remaining five still with WEZCO continue operating to this day.

In 1989, five engines built in,  by  were delivered, joining the F40PH's on commuter and employee transport duties.

In 1993, six former  locomotives were purchased and were rebuilt by  at  into F40PHL-2A locomotives. These supplemented the F40PH and F59PH engines on the commuter trains and employee transport trains.

In 1996, 17 engines were delivered in one shipment from Erie, Pennsylvania.