What precautions should I take in order to ensure the cardan shaft efficiency over time?

When an earth-moving machine is left unused for a long time and gets exposed to harsh weather, it is recommended to protect the cardan shaft from the atmospheric agents. Before starting to use the machine again, it is essential to lubricate the cross kits. A poor cardan shaft maintenance can lead to serious consequences on the ditcher transmission, which, in case of impact with a hard obstacle (such as stones or oversized roots) can be severely damaged (breaking of gears).