West Germany Black Forest Cuckoo Clock-One Day-Working-Needs Adjustment

West Germany Black Forest Cuckoo Clock-One Day-Working-Needs Adjustment. It ticks with the leaf swinging. The Pinecone weights in good order. One of the chains that makes the leaf swing seems to be stuck in a place. I know it can be moved, however I don't want to mess up the mechanism. So I will leave it to some one that knows how to work on cuckoo clocks.