A brief description of the operating model MR14
1. The unit can operate only when the bridge is placed on a fixed support and is attached to the chains.
2. When charging the main hydro-system valve to be opened.
3. On the driving device:
with a load of not more than 10km / h
without load of not more than 20km / h.
T.B.
https://youtu.be/kHEsef1XfAg