621 Partial Wheel Tractor-Scraper
- Tractor Engine
- Cat® C13
- Flywheel Power - Tractor
- 407 hp
- Top Speed - Loaded
- 33.5 mile/h
621 Wheel Tractor-Scraper
- Flywheel Power - Tractor/Scraper
- 304 kW (407 hp)
- Scraper Capacity - Heaped
- 24 yd³
- Top Speed - Loaded
- 33.5 mile/h
631 Partial Wheel Tractor-Scraper
- Tractor Engine
- Cat® C18
- Flywheel Power - Tractor
- 570 hp
- Top Speed - Loaded
- 34.7 mile/h
651 Partial Wheel Tractor-Scraper
- Tractor Engine
- Cat® C18
- Gross Power (SAE J1995)
- 637 hp
- Top Speed - Loaded
- 34.9 mile/h
651 Wheel Tractor-Scraper
- Tractor Engine
- Cat® C18
- Flywheel Power - Tractor/Scraper
- 469kW (629 hp)
- Scraper Capacity - Heaped
- 44 yd³
657 Wheel Tractor-Scraper
- Flywheel Power - Tractor/Scraper
- 469kW (629 hp) / 353 kW (473 hp)
- Tractor Engine
- Cat® C18
- Scraper Engine
- Cat® C15
657 Wheel Tractor-Scraper
- Tractor Engine
- Cat® C18
- Flywheel Power - Tractor/Scraper
- 469kW (637 hp) / 353 kW (479 hp)
- Scraper Engine
- Cat® C15

