|
Vehicle description:
The 744.7 locomotive was the product of a comprehensive upgrade of the original 740 class and is designed for medium-heavy shunting and track service, primarily in industry. It is a cab-behind-engine locomotive with a single turret cab near the rear end of the unit with AC/DC power transmission and an EDB. The following parts from the original locomotive have been retained: the bogie assembly, underframe, main air reservoirs and fuel tank. The cab and hoods, including internal fittings, have been entirely reworked.
A new 970 kW Caterpillar 3508 DI-TA diesel engine, flange-coupled to a Siemens Drásov 1FC2 454 traction alternator, has been flush-mounted in the underframe, allowing the hood to be lowered and a superb-visibility turret cab (with large windows and forward-sloping windshield) to be installed. A new cooling block has been located in front of the engine.
At the forward end of the front hood there is a pneumatic block containing most of the locomotive’s pneumatic equipment. The short rear section contains the switchboard and the EDB resistor, including fan units. The 744.7 locomotive is fitted with a 1,020 kW inclination/gradient and stopping EDB and an electronically controlled automatic and direct-acting pneumatic brake. The DAKO air brake is dual system. The locomotive is operated using an NES electronic digital control system. The locomotive is equipped with effective wheelslip protection, a vigilance device and electronic speedometer, pulse sanding and wheel flange lubrication.
|
News: