Four-axled machines in standard railway vehicle design, with or without material car. The sturdy frame construction takes account of the special requirements made by lifting and lining forces on heavy permanent way designs. Two-axled bogies ensure smooth running. Efficient work units and measuring systems guarantee that an exact and long-lasting track geometry is produced. The frame is made of shaped sections, rolled profiles and steel sheets, produced using the most up-to-date welding methods.
Two independent action tamping units are mounted directly in front of the rear bogie. The sub-frames are laterally displaceable, which permits automatic centering of the units over the rails during work in curves. The two heavy-duty tamping units work according to the well-proven non-synchronous uniform pressure tamping principle. Force equilibrium between the tine pairs, directional vibration in the squeeze direction and the ideal vibration frequency of 35 Hz guarantee completely uniform tamping. Two two-sleeper tamping units with a total of 32 tamping tines for tamping two sleepers per tamping cycle.
Hydraulically powered sleeper-end consolidators are mounted level with the tamping units or the rear bogie. During tamping these fill up the empty gap occurring at the ends of the sleeper during the lining process. This permits optimum fixation of the track in lifted and lined position.
The two well-proven roller lifting and lining units lift and line the track in one operation. The units have a total of four roller-lifting clamps. The distribution of the lifting forces and the exact centering of the units over the rails prevent the occurrence of tilting moments and any excessive wear on rail fastenings. For transfer travel the units are lifted and locked. At the start of work they are lowered onto the track and remain there during the entire work process.
The front cabin houses the operating and monitoring controls for the lining and leveling system as well as necessary controls for the transfer travel. The cabin is reached by side steps and sliding doors. In the rear cabins all the controls for transfer travel are available. Moreover, the operating and monitoring controls for controlling and monitoring the work units are clearly laid out. The cabin is reached by side steps and sliding doors. Both cabins are equipped with large safety glass windows. A good view during work and transfer travel is assured. An intercom system between the two cabins is fitted in standard design. Extensive soundproofing and vibration dampening achieve the high level of working comfort. There is an end-to-end roof between the two cabins.