The Caterpillar 140M Motorgrader in 1:50th scale was released by Norscot in 2009 with #55236.

Caterpillar 140M Motorgrader

The Caterpillar 140M Motor Grader represents a revolution in operational efficiency, visibility, service ease and overall productivity, setting the new standard and building on the legacy of high quality you can trust.

Building on the strong heritage of the H Series, the current M Series delivers multiple technological breakthroughs setting a new standard for motor graders. The H Series has been the industry standard in a variety of heavy construction, road building and governmental applications. The M Series continues this tradition, incorporating revolutionary, customer-driven enhancements by:

• Improving ease of operation and operator training time.
• Best-in-class operator station and unmatched visibility.
• Increasing productivity.
• Improving availability and decreasing maintenance time.
• Building on a legacy of superior quality.
• Base Power (all gears) Net: 138 hp to 259 hp.
• Displacement: 403 in3 to 677 in3.

On YouTube I found this nice Caterpillar 140M Motor Grader 3D Animation film I do not want to withhold:

Caterpillar 140M Motorgrader Specs AEHQ5731-02 (5-09)(PDF)