CAT631E Good Condition with service history. Low hours. Single engine, air conditioned cabin.
The 631E came standard with a four-stroke 3408 turbocharged V-8 engine which generated 450 flywheel horsepower and propelled the fully loaded scraper up to 30 mph. This included a direct-injection CAT fuel system with individual, adjustment-free injection pumps, variable injection timing and water jacket aftercooling. A 24-volt electric starting system with an ether starting aid was included for use in harsh temperatures. An electric monitoring system oversaw critical functions of its operation.
Tractor and scraper together weighed 95,000 pounds when empty, but over 171,000 pounds when its 75,000 (~31 cubic yds) capacity load was maxed. The scraper could cut as deep as 17.2” with a blade width of nearly 11.5’ giving it substantial ability to remove and relocate large amounts of top soil. They were frequently utilized to level and/or flatten areas that were turned into housing developments, parking lots, and shopping malls.
