美国Century 643—H型4300马力液力传动内燃机车(图1)是美国Alco公司与西德Krauss—Maffei工厂合作,由Alco公司制造的。这是美国自己制造的第一批液力传动内燃机车,共三台,已于1964年交付南太平洋铁路使用。机车上装有两台Alco 251C型12缸柴油机,液力传动装置的型号是Voith L830rU,根据美国铁路要求,机车在气温华氏60度时, The United States Century 643-H 4300 horsepower hydraulic diesel locomotive (Figure 1) is the United States Alco Corporation and West Germany Krauss-Maffei factory, manufactured by Alco. This is the first batch of three hydraulically driven diesel locomotives manufactured by the United States and delivered to the South Pacific Railway in 1964. Locomotive equipped with two Alco 251C 12-cylinder diesel engine, hydraulic transmission model is Voith L830rU, according to the United States Railway requirements, the locomotive at a temperature of 60 degrees Fahrenheit,