The locomotives have pulse output control, DC wheelset drive with traction motors and joint coupling and transmission. Škoda Pars performs main repairs on these drives. This particularly means completely removing all units from the engine room and repairing and replacing them with more modern ones.
The modernization can improve the speed of the locomotive to 140 km/h by installing master control, including displays on the engineer’s panel for cooperation with the coaches it controls via WTB communication, adding fire alarms, electronic tachographs, telerail for remote data transmission, automatic speed control, and bridging emergency brakes or automatic train control. A new train controller, train radio, information system, including a display panel and camera system, can also be installed.
