A loader implement includes a support mast that is provided with a mounting area for a front loader arrangement. The loader implement includes a roll-over protective assembly that is coupled to one of the other or both of the loader implement, or support mast. The protective assembly can be selectively pivoted between a raised protective position wherein it extends over an operator's platform and a lowered non-protective position, wherein it extends forward of the operator's platform. So as to prevent the loader arrangement from being used without the benefit of the protective assembly in its protective position, the mounting area for the loader arrangement is blocked by the protective assembly when the latter is in its non-protective position and is not cleared to permit the mounting of the loader arrangement until the protective assembly is moved to its protective position.