621 Wheel Tractor-Scraper
- Flywheel Power - Tractor/Scraper
- 304 kW (407 hp)
- Scraper Capacity - Heaped
- 24 yd³
- Top Speed - Loaded
- 33.5 mile/h
621K Wheel Tractor-Scraper
- Flywheel Power - Tractor/Scraper
- 304 kW (407 hp)
- Scraper Capacity - Heaped
- 24 yd³
- Top Speed - Loaded
- 33.5 mile/h
631K Wheel Tractor-Scraper
- Flywheel Power - Tractor/Scraper
- 570 HP
- Scraper Capacity - Heaped
- 34 yd³
- Top Speed - Loaded
- 34.7 mile/h
637K Wheel Tractor-Scraper
- Flywheel Power - Tractor/Scraper
- 570 HP
- Scraper Capacity - Heaped
- 34 yd³
- Top Speed - Loaded
- 34.7 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
- Tractor Engine
- Cat C18
- Flywheel Power - Tractor/Scraper
- 469kW (629 hp) / 353 kW (473 hp)
- Scraper Engine
- Cat C15