Class 36 (200) Diesel Shunters, 36-237 & 36-220, are pictured here at one of the entrances to the Bayhead Yard/s - the largest railway goods receiving and dispatching yard in Durban. With reference to Col. André Kritzinger's Wikipedia reference articles again, a total of 101 of these Class 36 (200) shunting locomotives, "equipped with two station controls for bi-directional operation", were placed in service between 1980 and 1984. They were built by General Motors South Africa, as Type SW1002.
Photos taken in the Durban area, from the PRASA / Metrorail yards just North of Durban Station to Rossburgh Station including the Bayhead yards and along the Esplanade, Maydon Wharf and around Durban Harbour.