Not your average dump trucks, Max and Monty are part of the Thomas & Friends Wooden Railway System.

Max is No. 15 and Monty is No. 16.  These twin dump trucks think they know everything about construction, and cause havoc by their reckless nature.  They like to bully the smaller machines in the yard, but eventually they always get their comeuppance.  Max and Monty are designed to work on and off track.  Slide their fuel tanks to lift their truck beds.  As seen in "On Site With Thomas" and "Thomas' Trusty Friends" videos.