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 field.