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]
(..) That's my boat. I have a feeling if we head due east, we'll find some shrimp. So take a left. - Take a left! - Which way? Over there! They're over there! - Get on the wheel and take a left. - OK. Gump, what are you doing? Take a left! Left! That's where we're going to find those shrimp, my boy! (..)1994 Forrest Gump