With today's announcement, she has 'set the wheels in motion' for a run for the presidency. [=she has begun to run for president]
You could almost see the 'wheels' turning in his head. [=you could almost see him thinking about how to do something]
They hoped that the tax cuts would 'grease the wheels' of the economy. [=would help the economy work better]
(..) ..and that he stays there. Yes, sir. Come along, you. # O hear us when we cry to Thee... # ..for those in peril on the sea. - Why two steering wheels ? - We only use this near shore. Sir, another ice warning. This one's from the Noordam. Thank you, Sparks. Oh, not to worry. (..)1997 Titanic