The Caterpillar 621K Wheel Tractor Scraper is released by Caterpillar in 2014 and refine the design of their “H” Series predecessors, which introduced features such as Sequence Assist and Load Assist that automate cycles. The “K” Series models build on the design of their “H” Series predecessors with new features, including high pressure steering, engine over-speed protection, tire spin reduction, differential lock engagement protection, machine/ground-speed control, and a payload-estimator system.

The Caterpillar 621K incorporate a number of additional enhancements: Advanced Cushion Hitch uses new software to dampen end-of-stroke movement of the load cylinder for a smoother ride; hydraulic-system refinement simplifies the bowl quick-drop function; draft arm overflow guards divert material away from bowl sides; Auto-Stall assists in quickly bringing the transmission to operating temperature for faster transitions from torque-converter drive; cab interiors feature a redesigned dash as well as visibility and operator comfort enhancements; maintenance improvements include an easier-to-service filter bank.

Specification highlights:

• Caterpillar C13 Acert Tier 4 Final/EU Stage IV Engine
• Net Power – ISO 9249: 407hp
• Maximum Gross Vehicle Weight: 80630.0 lb
• Scraper Bowl Capacity (Heaped): 24.0 yd3
• Maximum speed Forward: 1-8: 4.2 – 33.5 mph
• Rated Load: 57.610 lb
• Width of Cut: 10.3 ft