SJ type J with driving wheels 1.3 m diameter for mixed traffic use, built Atlas, Motala and Nohab, 1914–1918. SJ type SB with driving wheels 1.75 m diameter for passenger use, built Motala 1917, one preserved. It was in service until 1970 and has been preserved in the Bavarian Railway Museum. Usage Austria įor the private TAG, which operated the railway line from Schaftlach to Tegernsee, the 2-6-4T steam locomotive TAG 8 was built in 1942, using wheels from DRG Class E 79. The earliest known example also originated in South Africa, the Pretoria-Pietersburg Railway's 55 Tonner of 1898. They have been less successful on express passenger trains. Tank engines with the 2-6-4T wheel arrangement were produced for many different railway systems worldwide and were mainly used for freight and suburban passenger working. The latter were the first known tender locomotives in the world to be built with this wheel arrangement. In 1902, more were placed in service, but built with the 2-6-4 wheel arrangement. The first engines of the class were modified 2-6-2 Prairie locomotives which were equipped with two-axle trailing bogies. The earliest known example was the South African Class 6Z, designed by Cape Government Railways (CGR) Chief Locomotive Superintendent Hazlitt Beatty in 1901. With only a few known exceptions, the Adriatic wheel arrangement was usually used on tank locomotives, for which various suffixes to indicate the type of tank would be added to the wheel arrangement, for example 2-6-4T for an engine with side-tanks. This arrangement is commonly called Adriatic. Under the Whyte notation for the classification of steam locomotives, a 2-6-4 locomotive has two leading wheels, six coupled driving wheels and four trailing wheels.

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