Max and Monty are two Devious and Troublesome Dump truck Twins.
They are numbered 15 and 16.
Plot:
Max and Monty were reckless, rude, devious and troublesome. Despite this, They were being good hearted when they are sternly scolded by Miss Jenny.
Appearances:
- Season 7: Stanley, Whiff, and The Troublesome Dumptrucks
- Season 8: A Challenge for the Controller, Tick-Tock-Jock (cameo) and The Almighty Alfie
- Season 11: Duncan in the Dumps (do not speak)
- Season 12: Greetings, Montague! (not named; do not speak), Scottish Blues (mentioned), Percy Gets a Promotion, Bulgy Takes the High Road (cameo) and The Mystery Train (cameo)
- Season 13: The Duke of Hazard (do not speak), Oliver's Fossil Fright and Ivo Hugh's Day at the Zoo (cameo)
- Season 14: James in a Jam (Max only, cameo)
- Season 15: Jock Beats the Clock (cameo) and The Island Of Misfit Engines (cameo)
- Season 16: Sweet Sixteen (cameo), Luke Dukes It Out (cameo) and Knock it Off, Stanley (cameo)
- Season 17: Hard to Handel (cameo), Oliver Confusion (cameo), Thomas' Crown Affair (cameo), and Para-Norman Activity (cameo)
Specials:
- Saving Pirate Ryan (Max only; Monty cameo)
