This International Standard applies to caravans and light trailers with a total loaded mass of less than or equal to 3.5 tonnes1'. It concerns vacuum braking equipment, compris ng one or two pipes, one for service braking, the other for replenis ing the vacuum reserve on the trailer.
NBN R 01-023-1979 history
1979NBN R 01-023-1979 Road vehicles - Caravans and light trailers - bouplings for vacuum braking Systems - Dimensional characteristics