One of the well-known locomotives used for many years to haul the Taupo Totara Timber Company's log and freight trains between Mokai and Putaruru, photographed as it passed through Taupo some years ago, following abandonment by the Company of rail transport. For many years much of Taupo's freight came from Auckland; and was carried by the T.T.T. Company's trains from Putaruru to a siding between Oruanui and Mokai, thence coming to Taupo by motor-lorry. Manufactured by the Heisler Locomotive Co., U.S.A., the locomotives had a loaded weight of 30 tons, could climb grades of 1 in 20 and on the level pulled as heavy a load as an N.Z. Railway's K locomotive. They were the first locomotives in N.Z. to be fitted with turbine-driven lighting generators.

Taupo Times, Volume IV, Issue 181, 15 July 1955, Page 1

One of the well-known locomotives used for many years to haul the Taupo Totara Timber Company's log and freight trains between Mokai and Putaruru, photographed as it passed through Taupo some years ago, following abandonment by the Company of rail transport. For many years much of Taupo's freight came from Auckland; and was carried by the T.T.T. Company's trains from Putaruru to a siding between Oruanui and Mokai, thence coming to Taupo by motor-lorry. Manufactured by the Heisler Locomotive Co., U.S.A., the locomotives had a loaded weight of 30 tons, could climb grades of 1 in 20 and on the level pulled as heavy a load as an N.Z. Railway's K locomotive. They were the first locomotives in N.Z. to be fitted with turbine-driven lighting generators.