[1] The entire locomotive was created after an implementation project at Sulzer AG, the then Bukarester Lokomotivwerke 23.

Another variant of the LDH 125 was the LDE 125 series, units of which were built from 1977 with the same design but using diesel-electric transmission.

[1] The locomotives were used in marshalling yards and on industrial railways on a variety of routes with medium transport needs and along steeply-graded routes, where they replaced numerous steam locomotives there, especially the CFR series 230 and the CFR series 50.

For example, Alstom offered a conversion variant in which the old Sulzer diesel engines were replaced with newer units using the same hydrodynamic power transmission.

As these conversion measures proved their worth, other vehicles were converted at Remarul and given the Class 82 designation.

[4][5] The locomotive is equipped with two hoods of different lengths and an off-center driver's cab that extends over the entire width of the chassis.

The 6 LDA 28 is a six-cylinder, four-stroke diesel engine, which developed 920 kW (1230 hp) at 750 rpm, was originally used as the drive system.

The motor drives the hydraulic transmission via a flexible coupling, licensed from Voith in St. Pölten.

This transmission, which consists of two converters, shifts automatically depending on the engine torque and speed.

Originally, locomotives for passenger train service were equipped with an oil-fired boiler, but were later upgraded with an electric heating system.