Caterpillar offers partial wheel tractor-scraper power units designed for specialty machines that complement the traditional Cat® product line. These tractor-only configurations are available for purchase directly from Caterpillar OEM Solutions. They can be leveraged for a variety of final machines, including water pulls, elevating scrapers, lowboy trailer power units, and more. With improvements in productivity combined with enhancements in operator comfort and new safety features – Powered Access System and effective wet disc brakes – this machine offers high returns on time and investment.


Partial Scrapers

Cat 621 partial wheel tractor scraper

Tractor Engine
Cat® C13
Flywheel Power - Tractor
407 HP (304 kW)
Top Speed - Loaded
33.5 mile/h (53.9 km/h)

Cat 631 partial wheel tractor scraper

Tractor Engine
Cat® C18
Flywheel Power - Tractor
570 HP (425 kW)
Top Speed - Loaded
34.7 mile/h (55.8 km/h)

Cat 651 partial wheel tractor scraper

Tractor Engine
Cat® C18
Gross Power (SAE J1995)
637 HP (475 kW)
Top Speed - Loaded
34.9 mile/h (56.1 km/h)