Frank

Frank is a large combine harvester whose behavior closely resembles a bull. He guards the tractors at night while they sleep, and attempts to get Mater and Lightning McQueen when he finds that they are tractor tipping.

Bio
Frank is a hard-working combine harvester. He spends his days in the fields harvesting, threshing, and cleaning grain; then it's off to oversee the tractors' work for the rest of the afternoon. When Mater and Lightning McQueen are tractor tipping, Frank angrily chases them out of the Tractor Pasture.