TU8 diesel locomotive  TU8 () – Soviet, later Russian diesel locomotive for gauge . Diesel locomotive TU8 () is used for transportation & shunting services on narrow-gauge railways with a track gauge ranging from to . The TU8 was developed in 1987 – 1988 at the Kambarka Engineering Works to replace the ageing locomotive classes TU6A (). The cab is equipped with efficient heat-system, refrigerator, radio-set and air conditioning. The diesel locomotive TU8 (ТУ8) has been used as the basis of three other locomotives: