Byron is a large bulldozer with a big blade. He carries out bulldozing work along with leveling the ground.
In his first appearance, Byron was helping to clear room for new railway lines at the quarry. On Jack's first day, he scooted towards the bulldozer and eagerly wanted to help him. But Byron turned down the offer and conceitedly asked him to help Kelly.
When the machines were arguing about who was the most important, Byron replied to Jack that leveling the site was important because that was what he did. When Max and Monty's reckless behaviour caused a water supply pipe to burst, Alfie became trapped in thick mud. By using his blade, Byron rescued Alfie out off the mud to safety.
Byron the boisterous bulldozer with a big blade. He likes nothing better than showing the other machines on how to get the job done. He's very proud and doesn't like to waste his talents on jobs he feels are beneath his stature. Byron’s the envy of all the other vehicles...or, at least, he thinks he is. He has a booming voice and likes to work hard. Never the less, Byron is always enthusiastic, reliable and wise.
Byron is based on a Caterpillar bulldozer from the late 1930's.
Byron is painted yellow with a black cab. The number "18" is painted on the sides of his cab in yellow.
- Ryōichi Tanaka (Japan; sixth season only)
- Byron is one of the machines whose silhouette is pictured on the Pack's logo.
- Byron did not have his number in Robert Gauld-Galliers' original artwork.