 On the busy line from Krugersdorp via Zeerust to Mafeking, the Class 34-400 became the standard motive power.Some eventually joined the Class on the Sishen-Saldanha iron ore line, to haul export ore from the open cast iron mines at Sishen near Kathu in the Northern Cape to the harbour at Saldanha in the Western Cape.Here they ran consisted to electric locomotives to haul the 342 wagon iron ore trains.